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Effect of Zircon Addition on Properties of Corundum Porous Materials
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作者 CHEN Haonan LIU Xin +3 位作者 ZHANG Shiming LI Ying WANG Di JIA Quanli 《China's Refractories》 CAS 2024年第1期7-13,共7页
This paper aims to improve the corrosion resistance of dispersive purging plugs.White fused corundum particles and fine powder,α-Al_(2)O_(3) micropowder,Cr_(2)O_(3) micropowder,Guangxi clay and zircon powder were use... This paper aims to improve the corrosion resistance of dispersive purging plugs.White fused corundum particles and fine powder,α-Al_(2)O_(3) micropowder,Cr_(2)O_(3) micropowder,Guangxi clay and zircon powder were used as the main raw materials.The mass ratio of white fused corundum particles and fine powder was fixed at 85:15,and 0,1%,2%,or 3%(by mass)of zircon fine powder was added to replace the same amount of white fused corundum fine powder.The corundum porous material was prepared by the particle stacking pore-forming method at 1650℃for 3 h.The effect of the zircon addition on the properties and microstructure of porous materials was investigated.The results show that:after adding zircon,the permeability of the porous material increases,the cold and hot strengths increase obviously,and the expansion rate after firing decreases.When the addition of zircon is 2%,the comprehensive performance of the specimen is optimal with the smallest linear change rate and the highest permeability. 展开更多
关键词 porous materials zircon fines purging plug PERMEABILITY
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Mechanism of anti-arterial thrombosis of Dahuangzhecong Fang screened by Ti-Al intermetallic compound porous material 被引量:2
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作者 万玲 王战义 +6 位作者 魏星 李佶阳 钟广伟 段晓鹏 贺福元 江垚 王东生 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第12期3156-3160,共5页
The mechanism of antithrombotic of Dahuangzhechong Fang separated and purified by Ti-Al intermetallic compound porous material (TAICPM) was researched. Dahuangzhechong Fang, which was isolated and screened by TAICPM, ... The mechanism of antithrombotic of Dahuangzhechong Fang separated and purified by Ti-Al intermetallic compound porous material (TAICPM) was researched. Dahuangzhechong Fang, which was isolated and screened by TAICPM, was used to oral rats. At the end of study, their blood and thrombus were collected. The results show that TAICPM with the pore size of 1-5 μm can screen Dahuangzhechong Fang well. Dahuangzhechong Fang can increase 6-keto-PGF1α, lower content of TXD2 and platelet. Dahuangzhechong Fang has good effect to resist arterial thrombosis. 展开更多
关键词 Ti-Al intermetallic compound porous materials Dahuangzhecong Fang arterial thrombosis isolated Chinese medicine
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Theoretical prediction of effective elastic constants for new intermetallic compound porous material 被引量:2
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作者 苏淑兰 饶秋华 贺跃辉 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第4期1090-1097,共8页
Based on microstructure analysis of the new Ti-A1 intermetallic compound porous material, a micromechanics model of heterogeneous Plateau porous structure was established and calculation formulas of elastic constants ... Based on microstructure analysis of the new Ti-A1 intermetallic compound porous material, a micromechanics model of heterogeneous Plateau porous structure was established and calculation formulas of elastic constants (including effective elastic modulus, effective shear elastic modulus and effective Poisson ratio) were derived by the energy method for this porous material. Calculation results show that both the effective elastic modulus and effective shear elastic modulus increase with the increase of the relative density while the effective Poisson ratio decreases. Compared with the currently-existing hexagonal honeycomb model and micromechanics model of composite materials, the micromechanics model of heterogeneous Plateau porous structure in this study is more suitable for characterizing the medium-density porous material and more accurate for predicting the effective elastic constants of the medium-density porous material. Moreover, the obtained explicit expressions of the effective elastic constants in term of the relative density rather than the microstructural parameters for the uniform and regular Plateau porous structure are more convenient to engineering application. 展开更多
关键词 intermetallic compound porous material effective elastic modulus Plateau structure energy method
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Volumetric extraction of porous materials based on octree algorithm
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作者 罗守华 李光 顾宁 《Journal of Southeast University(English Edition)》 EI CAS 2010年第4期537-540,共4页
Through the octree data structure analysis,a volumetric dataset of closed-cell porous materials is converted into a dataset of hierarchical octree nodes,and then the specific traversal search algorithm on the octree n... Through the octree data structure analysis,a volumetric dataset of closed-cell porous materials is converted into a dataset of hierarchical octree nodes,and then the specific traversal search algorithm on the octree nodes is depicted in details,which is involved in six steps of the volume growth model and one step of the volume decomposition model.Moreover,the conditions of both the proceeding traversal and three possibilities of terminating are given,and the traversal algorithm of completeness is proved from a theoretical perspective.Finally,using a simulated volumetric dataset of columnar pores,the extracting effectiveness of the octree traversal algorithm is verified.The results show that the volume and the distribution information of pores can be successfully extracted by the proposed algorithm,which builds a solid foundation for a more effective performance analysis of porous materials. 展开更多
关键词 OCTREE closed-cell porous materials volume of pores traversal algorithm
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Review of the fabrication and application of porous materials from silicon-rich industrial solid waste 被引量:17
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作者 Chao Miao Lixing Liang +5 位作者 Fan Zhang Shumei Chen Kaixuan Shang Jinlong Jiang Yi Zhang Jing Ouyang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2022年第3期424-438,共15页
Porous materials have promise as sound insulation, heat barrier, vibration attenuation, and catalysts. Most industrial solid wastes, such as tailings, coal gangue, and fly ash are rich in silicon. Additionally, a high... Porous materials have promise as sound insulation, heat barrier, vibration attenuation, and catalysts. Most industrial solid wastes, such as tailings, coal gangue, and fly ash are rich in silicon. Additionally, a high silicon content waste is a potential raw material for the syn- thesis of silicon-based, multi-porous materials such as zeolites, mesoporous silica, glass-ceramics, and geopolymer foams. Representative sil- icon-rich industrial solid wastes (SRISWs) are the focus of this mini review of the processing and application of porous silicon materials with respect to the physical and chemical properties of the SRISW. The transformation methods of preparing porous materials from SRISWs are summarized, and their research status in micro-, meso-, and macro-scale porous materials are described. Possible problems in the application of SRISWs and in the preparation of functional porous materials are analyzed, and their development prospects are discussed. This review should provide a typical reference for the recycling and use of industrial solid wastes to develop sustainable “green materials.” 展开更多
关键词 silicon-rich industrial solid waste porous materials physicochemical properties material utilization of solid wastes
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Influence of porogen type and copper powder morphology on property of sintering copper porous materials 被引量:6
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作者 LIU Ru-tie CHEN Jie XIONG Xiang 《Journal of Central South University》 SCIE EI CAS CSCD 2018年第9期2143-2149,共7页
Copper porous materials have been manufactured by the method of powder metallurgy.Electrolytic copper powders and atomized copper powders are used as matrix material.Methylcellulose and paraffin are used as porogen.Th... Copper porous materials have been manufactured by the method of powder metallurgy.Electrolytic copper powders and atomized copper powders are used as matrix material.Methylcellulose and paraffin are used as porogen.The influence of porogen type and copper powder morphology on the property of copper porous materials is investigated as well.The results show that copper porous materials with paraffin as porogen have lower porosity and permeability compared with materials using methylcellulose as porogen,due to the different pore-forming mechanisms.The pore forming mechanism of methylcellulose is thermal decomposition,while the pore forming mechanism of paraffin is melting–evaporation.The morphology of copper powders affects the contact state between adjacent powders,which further influence the sintering shrinkage.The porous materials using arborescent copper powders as matrix have lower porosity,smaller pore size and lower permeability,compared with materials with atomized copper powders as matrix. 展开更多
关键词 copper porous materials sintered neck POROSITY PERMEABILITY
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THEORETICAL MODEL OF EFFECTIVE STRESS COEFFICIENT FOR ROCK/SOIL-LIKE POROUS MATERIALS 被引量:5
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作者 Kai Zhang Hui Zhou Dawei Hu Yang Zhao Xiating Feng 《Acta Mechanica Solida Sinica》 SCIE EI 2009年第3期251-260,共10页
Physical mechanisms and influencing factors on the effective stress coefficient for rock/soil-like porous materials are investigated, based on which equivalent connectivity index is proposed. The equivalent connectivi... Physical mechanisms and influencing factors on the effective stress coefficient for rock/soil-like porous materials are investigated, based on which equivalent connectivity index is proposed. The equivalent connectivity index, relying on the meso-scale structure of porous material and the property of liquid, denotes the connectivity of pores in Representative Element Area (REA). If the conductivity of the porous material is anisotropic, the equivalent connectivity index is a second order tensor. Based on the basic theories of continuous mechanics and tensor analysis, relationship between area porosity and volumetric porosity of porous materials is deduced. Then a generalized expression, describing the relation between effective stress coefficient tensor and equivalent connectivity tensor of pores, is proposed, and the expression can be applied to isotropic media and also to anisotropic materials. Furthermore, evolution of porosity and equivalent connectivity index of the pore are studied in the strain space, and the method to determine the corresponding functions in expressions above is proposed using genetic algorithm and genetic programming. Two applications show that the results obtained by the method in this paper perfectly agree with the test data. This paper provides an important theoretical support to the coupled hydro-mechanical research. 展开更多
关键词 rock/soil-like porous materials generalized model for effective stress coefficient tensor equivalent connectivity index of pore genetic algorithm
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Water purification with sintered porous materials fabricated at 400℃ from sea bottom sediments 被引量:2
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作者 DABWAN Ahmed H A IMAI Daizo +5 位作者 KANECO Satoshi SENMATSU Isamu NAKAHAMA Katsuyuki KATSUMATA Hideyuki SUZUKI Tohru OHTA Kiyohisa 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2008年第2期172-176,共5页
A sintering technology for preparing porous materials from sea bottom sediments was developed for use in water purification. The purpose of the present study was to develop methods for converting the sea bottom sedime... A sintering technology for preparing porous materials from sea bottom sediments was developed for use in water purification. The purpose of the present study was to develop methods for converting the sea bottom sediments dredged from Ago Bay into value-added recycled products. The sintered products fabricated at 400℃ were found to be very effective adsorbents for the removal of heavy metals. 展开更多
关键词 sintering preparation technology porous materials sea bottom sediments water purification heavy metals
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Frequency-dependent dynamic effective properties of porous materials 被引量:4
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作者 PeijunWei ZhupingHuang 《Journal of University of Science and Technology Beijing》 CSCD 2005年第3期236-242,共7页
The frequency-dependent dynamic effective properties (phase velocity, attenuation and elastic modulus) of porous materials are studied numerically. The coherent plane longitudinal and shear wave equations, which are o... The frequency-dependent dynamic effective properties (phase velocity, attenuation and elastic modulus) of porous materials are studied numerically. The coherent plane longitudinal and shear wave equations, which are obtained by averaging on the multiple scattering fields, are used to evaluate the frequency-dependent dynamic effective properties of a porous material. It is found that the prediction of the dynamic effective properties includes the size effects of voids which are not included in most prediction of the traditional static effective properties. The prediction of the dynamic effective elastic modulus at a relatively low frequency range is compared with that of the traditional static effective elastic modulus, and the dynamic effective elastic modulus is found to be very close to the Hashin-Shtrikman upper bound. 展开更多
关键词 dynamic effective properties porous material size effects multiple scattering
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Preparation of Nano-porous Materials(Ⅰ) by Polymerization of Amphiphile Self-assemblies 被引量:2
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作者 YUE Dong-mei +2 位作者 YU Jiong 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2003年第1期112-119,共8页
The polymerization of amphiphilic self assemblies is a promising method to synthesize nano structured materials with novel properties. These materials have many attractive features for their application in biomedica... The polymerization of amphiphilic self assemblies is a promising method to synthesize nano structured materials with novel properties. These materials have many attractive features for their application in biomedical area and materials science, such as catalysis, separation, surface modification, and therapeutics areas. A general review on the polymerization of lipids and surfactant self assemblies to amphiphilic self assemblies is given in this paper with 49 references. The polymerization and the subsequently resulted structure of lipids in different morphologies are summarized. The polymerization of polymerizable surfactants(surfmers) in emulsion and liquid crystalline phases are also discussed. The potential application of new nano porous materials is briefly described. 展开更多
关键词 POLYMERIZATION AMPHIPHILE Self assembly Nano porous material Lyotropic liquid crystalline
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A LOWER BOUND APPROACH TO THE YIELD LOCI OF POROUS MATERIALS 被引量:2
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作者 Sun Yi Wang Duo(Department of Applied Mechanics,Harbin Institute of Technology) 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 1989年第3期237-243,共7页
A lower bound approach is proposed for the first time to solve the macroscopic yield loci of porous materials.The results are then compared with Gurson's upper bound yield loci and those of the experiments.It is s... A lower bound approach is proposed for the first time to solve the macroscopic yield loci of porous materials.The results are then compared with Gurson's upper bound yield loci and those of the experiments.It is shown that the present analysis is much more in accordance with the experimen- tal results than the Gurson's. 展开更多
关键词 constitutive equations porous materials ductile damage lower bound analysis method
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Recent Advances on Porous Materials for Synergetic Adsorption and Photocatalysis 被引量:2
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作者 Tianqi Wang Bingbing Tian +5 位作者 Bin Han Dingren Ma Mingzhe Sun Aamir Hanif Dehua Xia Jin Shang 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2022年第3期711-730,共20页
Porous photocatalysts are promising materials capable of simultaneously adsorbing and oxidizing/reducing target species,showing great potentials in environmental remediation and energy generation.This review offered a... Porous photocatalysts are promising materials capable of simultaneously adsorbing and oxidizing/reducing target species,showing great potentials in environmental remediation and energy generation.This review offered a comprehensive overview of the recent progress in design,fabrication,and applications of porous photocatalysts,including carbon-based semiconductors,metal oxides/sulfides,metal–organic frameworks,and adsorbent–photocatalyst hybrids.The fundamental understanding of the structure–performance relationships of porous materials together with the in-depth insights into the synergetic effects between adsorption and photocatalysis was presented.The strategies to further improve the photocatalytic activity of porous photocatalysts were proposed.This review would provide references and outlooks of constructing efficient porous materials for adsorptive and photocatalytic removal of pollutants and energy production. 展开更多
关键词 ADSORPTION PHOTOCATALYSIS porous materials synergetic effect
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ANALYSIS OF SHEAR LOCALIZATION IN POROUS MATERIALS 被引量:1
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作者 Sun Yi Wang Duo, Department of Applied Mechanics, Harbin Institute of Technology 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 1990年第1期29-34,共6页
A set of constitutive equations are derived based on the authors'lower bound yield loci for porous materials. By using these equations, the conditions for shear localization in porous materials are then investigat... A set of constitutive equations are derived based on the authors'lower bound yield loci for porous materials. By using these equations, the conditions for shear localization in porous materials are then investigated and the results are compared with those of Gurson's equations and the finite element analysis. The advantages of the present constitutive equations are fully illustrated. 展开更多
关键词 constitutive equations shear localization analysis porous materials ductile fracture
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Simulation Study of Shock Reaction on Porous Material 被引量:1
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作者 XU Ai-Guo ZHANG Guang-Cai PAN Xiao-Fei ZHU Jian-Shi 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第4期691-699,共9页
Direct modeling of porous materials under shock is a complex issue. We investigate such a system via the newly developed material-point method. The effects of shock strength and porosity size are the main concerns. Fo... Direct modeling of porous materials under shock is a complex issue. We investigate such a system via the newly developed material-point method. The effects of shock strength and porosity size are the main concerns. For the same porosity, the effects of mean-void-size are checked. It is found that local turbulence mixing and volume dissipation are two important mechanisms for transformation of kinetic energy to heat. When the porosity is very small, the shocked portion may arrive at a dynamical steady state; the voids in the downstream portion reflect back rarefactive waves and result in slight oscillations of mean density and pressure; for the same value of porosity, a larger mean-void-size makes a higher mean temperature. When the porosity becomes large, hydrodynamic quantities vary with time during the whole shock-loading procedure: after the initial stage, the mean density and pressure decrease, but the temperature increases with a higher rate. The distributions of local density, pressure, temperature and particle-velocity are generally non-Gaussian and vary with time. The changing rates depend on the porosity value, mean-void-size and shock strength. The stronger the loaded shock, the stronger the porosity effects. This work provides a supplement to experiments for the very quick procedures and reveals more fundamental mechanisms in energy and momentum transportation. 展开更多
关键词 shock wave porous material equation of state
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Progresses of hyperpolarized ^(129)Xe NMR application in porous materials and catalysis 被引量:3
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作者 Benhan Fan Shutao Xu +1 位作者 Yingxu Wei Zhongmin Liu 《Magnetic Resonance Letters》 2021年第1期11-27,共17页
^(129)Xe NMR has been proven to be a powerful tool to investigate the structure of porousmaterials. Xenon is a monatomic noble gas which could be used as a probe due to theextremely sensitive to its local environment.... ^(129)Xe NMR has been proven to be a powerful tool to investigate the structure of porousmaterials. Xenon is a monatomic noble gas which could be used as a probe due to theextremely sensitive to its local environment. Optical pumping techniques for production ofhyperpolarized (HP) xenon have led to an increase of sensitivity up to orders of magnitudecompared with traditional ^(129)Xe NMR. This review summarizes the application of thistechnique in porous materials and heterogeneous catalysis in recent ten years, involving ofzeolites, metal-organic frameworks (MOFs), catalytic process and kinetics. 展开更多
关键词 Solid-state NMR Hyperpolarized^(129)Xe REVIEW porous materials CATALYSIS
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Generalized Parameters of Porous Materials as Similarity Numbers 被引量:2
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作者 Leonid Titelman 《Advances in Materials Physics and Chemistry》 2021年第11期177-201,共25页
In the multifactorial preparation of porous materials, the simultaneous/se<span style="white-space:normal;font-size:10pt;font-family:;" "="">- </span><span style="white-spa... In the multifactorial preparation of porous materials, the simultaneous/se<span style="white-space:normal;font-size:10pt;font-family:;" "="">- </span><span style="white-space:normal;font-size:10pt;font-family:;" "="">quential influence of a number of technological variables changes the individual parameters of the texture of the material (surface area, volume, pore size, etc.) to different values and with increase or decrease. Generalized parameters (GPs) combine these changes;new dependencies arise. GPs behave like the dimensionless similarity numbers known in science and technology (Reynolds, etc</span><span style="white-space:normal;font-size:10pt;font-family:;" "="">.</span><span style="white-space:normal;font-size:10pt;font-family:;" "="">). They split the data (phenomena) into series with similar properties, reveal special patterns and structural nuances. New GPs proposed. The average pore size is presented as the product of two GPs: the <i>dimentionless</i> shape factor F and pore width of <i>unknown</i> shape (reciprocal of the volumetric surface). Using F, for example, the SBA-15 dataset (D. Zhao, Science 1998) was split into 3 series of samples differing in synthesis temperatures, unit cell parameters, intra-wall pore volumes, pore lengths, and the ratios of wall thickness to pore size. A surprising phenomenon was discovered one of the copolymers acts in a similar way to high temperatures.</span><span style="white-space:normal;font-size:10pt;font-family:;" "=""> </span><span style="white-space:normal;font-size:10pt;font-family:;" "="">The standard deviation (STD, %) of the texture parameter in the series is its <i>serial</i> GP. The surface topography (micropore volume per m<sup>2</sup>) is proposed;it eliminates fluctuation in material density and has a lower STD than cm<sup>3</sup>/g. Examples of the use of GPs for silica, carbon, alumina and catalysts are given. A correlation has been shown between the efficiency of some catalytic reactions (adsorption) and GPs.</span><span style="white-space:normal;font-size:10pt;font-family:;" "=""> </span><span style="white-space:normal;font-size:10pt;font-family:;" "="">GPs provide new information about materials and open up new research challenges.</span> 展开更多
关键词 Generalized Parameter SIMILARITY Pore Shape porous materials Surface Topography
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ON THE DEFORMATION AND FRACTURE OF POROUS MATERIALS
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作者 孙毅 王铎 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 1994年第2期169-175,共7页
The constitutive behavior of porous materials (including the yield loci, the void growth rate, the macro stress-strain relation and the strain to local- ization instability) is examined based on the lower bound approa... The constitutive behavior of porous materials (including the yield loci, the void growth rate, the macro stress-strain relation and the strain to local- ization instability) is examined based on the lower bound approach proposed by the present authors. These results are then compared with the experimental and the finite element results as well as those predicted by Gurson's equations. Emphasis is placed on approaching the real behavior from the upper and the lower bound analysis. Calculation is also made on the influence of void nucleation on the critical strain to instability and a modified strain-controlled nucleation criterion is proposed. Finally the instability and fracture of AISI4340 steel in plane strain tension is examined and comparison is made between theoretical and experimental results. 展开更多
关键词 constitutive equation porous material localization analysis
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RESEARCH ON MEASURING METHOD OF THE THERMALCONDUCTIVITY FOR HIGHLY POROUS MATERIALS
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作者 J Y Wu Z.M. Tang W Shi andR.Z. Wang (Institute of Refrigeration and Cryogenics Engineering, Shanghai Jiao Tong University, Shanghai 200030,China) 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1997年第3期213-218,共6页
A transient method with rectangular pulse heating has been developed to measure the thermal conductivity of highly porous materials such as activated carbon, zeolite and silica gel. By this method the thermal conducti... A transient method with rectangular pulse heating has been developed to measure the thermal conductivity of highly porous materials such as activated carbon, zeolite and silica gel. By this method the thermal conductivity can be measured quickly and accu-rately. In this paper, a set of automatically controlled testing equiptnent is presented.The measuring method is analysed. The thermal conductivities of some samples, such as activated carbon and zeolite, are measured by the equipment. A group of useful data has been obtained. 展开更多
关键词 thermal conductivity porous material thermophysical property
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EVOLUTION OF VOIDS IN DUCTILE POROUS MATERIALS AT HIGH STRAIN RATE
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作者 Jian, Zheng Ze-Ping, Wang 《Acta Mechanica Solida Sinica》 SCIE EI 1994年第3期191-202,共12页
In the present work, a dynamic damage model in ductile materials under the application of dynamic general stresses loading is presented. The evolution equation of ductile voids has the closed form, in which work-harde... In the present work, a dynamic damage model in ductile materials under the application of dynamic general stresses loading is presented. The evolution equation of ductile voids has the closed form, in which work-hardening, the change of surface energy of voids, rate-dependent, inertial effects are taken into account. The expressions of critical stresses for the growth and compaction of voids are directly obtained from the evolution equations of voids. Numerical analysis of the model indicates that the growth of voids is sensitive to the strain rates. The voids grow quickly as the increase of strain rates. It is also shown that the influence of the inertial effects on the void growth is great at high loading rates. It appears to resist the growth of voids. In addition, a dynamic collapse model of ductile voids is also proposed, which can be applied to study the problems of compaction in powder and other materials. 展开更多
关键词 COMPACTION DEFECTS DUCTILITY Dynamic loads Interfacial energy Mathematical models Numerical analysis porous materials Strain Stresses
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Second-order two-scale computations for conductive radiative heat transfer problem in periodic porous materials
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作者 杨志强 崔俊芝 李博文 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第3期91-98,共8页
In this paper, a kind of second-order two-scale (SOTS) computation is developed for conductive-radiative heat trans- fer problem in periodic porous materials. First of all, by the asymptotic expansion of the tempera... In this paper, a kind of second-order two-scale (SOTS) computation is developed for conductive-radiative heat trans- fer problem in periodic porous materials. First of all, by the asymptotic expansion of the temperature field, the cell problem, homogenization problem, and second-order correctors are obtained successively. Then, the corresponding finite element al- gorithms are proposed. Finally, some numerical results are presented and compared with theoretical results. The numerical results of the proposed algorithm conform with those of the FE algorithm well, demonstrating the accuracy of the present method and its potential applications in thermal engineering of porous materials. 展开更多
关键词 second-order two-scale (SOTS) computations periodic porous materials conductive-radiativeheat transfer
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