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Preparation of Amorphous LiZn Ferrites Hollow Microspheres by Self-reactive Quenching Technology 被引量:1
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作者 蔡旭东 WANG Jianjiang +3 位作者 LI Baochen XU Baocai WU Aihua WANG Bing 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2017年第4期812-815,共4页
NaCl aqueous solution(15 wt%) was used as the quenching medium to prepare amorphous Lithium-Zinc ferrite hollow microspheres(LiZn FHMs) based on self-reactive quenching technology. Investigations by scanning elect... NaCl aqueous solution(15 wt%) was used as the quenching medium to prepare amorphous Lithium-Zinc ferrite hollow microspheres(LiZn FHMs) based on self-reactive quenching technology. Investigations by scanning electro microscope, X-ray diffraction, electron diffraction of transmission electron microscope, and differential scanning calorimetry prove that LiZn FHMs are susceptible to amorphization. It is indicated that NaCl aqueous solution(15 wt%) has ultra-fast quenching speed, and the growth rate of crystals on LiZn FHMs is so large that the formation and growth of the crystal nucleus are significantly restrained. This is the main reason for the formation of amorphous LiZn FHMs. 展开更多
关键词 NaCl lithium-Zinc ferrite amorphous hollow microspheres self-reactive quenching technology
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Preparation of hollow ceramic microspheres absorbent based on self-reactive quenching technology
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作者 Jian-Jiang Wang Hong-Fei Lou +1 位作者 Jin-Hua Wen Xu-Dong Cai 《Rare Metals》 SCIE EI CAS CSCD 2015年第5期344-350,共7页
A1 + BaO2 + Fe2O3 + sucrose and O2 as reaction system and feeding gas, respectively, are used to prepare hollow multiphase ceramic microspheres (HMCMs) absorbent based on self-reactive quenching technology. The m... A1 + BaO2 + Fe2O3 + sucrose and O2 as reaction system and feeding gas, respectively, are used to prepare hollow multiphase ceramic microspheres (HMCMs) absorbent based on self-reactive quenching technology. The morphologies, particle size distribution, hollow structure and phase compositions were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD) and size analysis. The results show that the quenching products possess high sphere-forming rate, and most of them are hollow structures. Owing to the self-burst, the particle size is between 40 and 70 μm. The phase compositions contain Al2O3, Fe3O4, Fe2O3, Ba2Fe14O22, BaO2 and BaFe4O7. The microwave absorbing tests show that the lowest reflectivity of HMCMs is -19 dB. The frequency bands less than -10 dB are from 13.0 to 15.8 GHz. The reasons for HMCMs possessing good microwave absorbing properties may be their magnetic and electrical properties as well as special hollow structure. 展开更多
关键词 Self-reactive quenching technology Hollow multiphase ceramic microspheres Microwave absorbing properties
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