摘要
M相二氧化钒(VO_(2)(M))是一种具有特殊相变特性的智能隔热窗材料,然而VO_(2)(M)的相变稳定性还较差、对太阳光的调制能力还不够高,严重限制其在智能隔热窗中的工业化应用。本研究主要以五氧化二钒为钒源,草酸为还原剂,尿素为沉淀剂,硫酸钛为掺杂剂,水热还原法制备粉体M相钛(Ti)掺杂VO_(2),简称Ti-VO_(2)(M)粉体。通过X射线衍射仪(XRD)、场发射扫描电子显微镜(SEM)、紫外-可见-近红外分光光度计(UV-Vis-NIR)、差示扫描量热仪(DSC)和X射线能谱仪(EDS)分析所合成粉体的元素/物相组成和结构、结晶形态、太阳光反射率/透过率和相变温度的变化情况,优化Ti^(4+)掺杂量。研究发现,Ti;掺杂量控制在3%时,制备的Ti-VO_(2)(M)粉体的综合性能最优,为进一步应用智能隔热有机玻璃提供重要的数据与技术支撑。
M-phase vanadium dioxide(VO_(2)(M))is a kind of intelligent heat-insulating window material with special phase change characteristics.However,the phase change stability of VO_(2)(M)is still poor and its ability to modulate sunlight is not high enough,which severely limits its industrial application in smart thermal insulation win dows.In this study,the powder M-phase titanium(Ti)doped VO;,referred to as Ti-VO_(2)(M)powder,was prepared by hydrothermal reduction method using vanadium pentoxide as vanadium source,oxalic acid as reducing agent,urea as precipitant,titanium sulfate as dopant.Through X-ray diffractometer(XRD),field emission scanning electron microscope(SEM),ultraviolet-visible-near infrared spectrophotometer(UV-Vis-NIR),differential scanning calorimeter(DSC)and X-ray energy spectrometer(EDS),the changes of element/phase composition and structure,crystal form,sunlight reflectance/transmittance and phase transition temperature of the synthesized powder were analyzed and the Ti;doping amount was optimized.The results show that when the Ti^(4+)doping amount is controlled at 3%,the overall performance of the prepared Ti-VO_(2)(M)powder is the best,which provides important data and technical support for the further application of intelligent thermal insulation plexiglass.
作者
袁新强
张堃
王丹
蒋鹏
邓志峰
刘杰
包维维
Yuan Xinqiang;Zhang Kun;Wang Dan;Jiang Peng;Deng Zhifeng;Liu Jie;Bao Weiwei(School of Materials Science and Engineering,Shaanxi University of Technology,Hanzhong 723000,China;National and Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental Technology,Shaanxi University of Technology,Hanzhong 723000,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2022年第4期1442-1447,共6页
Rare Metal Materials and Engineering
基金
陕西省技术创新引导计划(基金)(2021CGBX-39)
矿渣综合利用环保技术国家地方联合工程实验室开放课题(SLGPT2019KF01-06)
陕西理工大学基金项目(SLG1810)。
