对于临界热敏电阻的研究,在美、日、英、俄等国家对二氧化钒相变特性的研究多侧重于单晶和溅射薄膜的探讨及其在掺杂前后晶格常数变化的研究领域中,对二氧化钒和二氧化钛等的陶瓷多晶材料在特定温度附近发生的半导体相—金属相转变,这种相变导致电阻率突变。据此研究的临界热敏电阻CTR是一种开关型温度敏器件。中国科 For the study of the critical thermistor, the research on the phase transition characteristics of vanadium dioxide in the United States, Japan, Britain and Russia focuses on the investigation of single crystal and sputtered thin films and the changes of their lattice constants before and after doping In the field of semiconductor phase-to-metal phase transformation of ceramic polycrystalline materials such as vanadium dioxide and titanium dioxide at specific temperatures, this phase change results in a sudden change in resistivity. According to the study of the critical thermistor CTR is a switch-type temperature-sensitive devices. China Branch