CAJ | 학술논문

以V2 O5和草酸为原料，采用高温热解前驱体法制备VO2粉体，并结合XRD分析和热致相变性能测定，研究热处理条件对VO2粉体晶体结构和相变性能的影响。结果表明，采用三段式升温制度，可制备晶化程度较高的VO2粉体。制备过程中，热分解温度的升高或热分解时间的延长，均会导致产物 VO2粉体平均晶粒尺寸增大、平均晶格畸变率降低、相变滞豫区间减小以及电阻突变量增大，热处理过程中VO2晶粒生长和晶格畸变率变化主要受热分解温度的控制。
이V2 O5화초산위원료，채용고온열해전구체법제비VO2분체，병결합XRD분석화열치상변성능측정，연구열처리조건대VO2분체정체결구화상변성능적영향。결과표명，채용삼단식승온제도，가제비정화정도교고적VO2분체。제비과정중，열분해온도적승고혹열분해시간적연장，균회도치산물 VO2분체평균정립척촌증대、평균정격기변솔강저、상변체예구간감소이급전조돌변량증대，열처리과정중VO2정립생장화정격기변솔변화주요수열분해온도적공제。
VO2 powders were prepared from V2 O5 and oxalic acid by the pyrolysis precursor method , and effects of different thermal treatment conditions on the crystal structure and phase transition char‐acteristics were studied by XRD and thermochromic property determination .The results show that VO2 powders with higher crystallization degree can be prepared by employing 3‐step heating schedule . Either with the increase of thermal decomposition temperature or the extending of decomposition time ,the grain size of VO2 powders increases ,crystal lattice distortion rate decreases ,hysteresis width decreases and adrupt drop of resistance rises .Thermal decomposition temperature is the major factor that affects the grain size and the lattice distortion rate of VO2 powders .