CAJ | 학술논문

用电循环处理方法研究空气烧结CaCu3Ti4O12陶瓷样品的I-V特性曲线与样品缺陷之间的关系.结果表明，通过电循环处理，CaCu3Ti4O12的电阻随循环次数增加而减小，在特定温度和电压下出现电阻突然减小，I-V特性曲线从非线性转变为欧姆线性的奇特行为，这是CaCu3Ti4O12研究中观察到的新现象.I-V曲线说明发生电阻突变时样品温度与电压的关系满足线性关系，通过高低电阻随温度的变化拟合得到CaCu3Ti4O12的晶粒、晶界激活能分别为0.06 eV、0.56 eV.①
용전순배처리방법연구공기소결CaCu3Ti4O12도자양품적I-V특성곡선여양품결함지간적관계.결과표명，통과전순배처리，CaCu3Ti4O12적전조수순배차수증가이감소，재특정온도화전압하출현전조돌연감소，I-V특성곡선종비선성전변위구모선성적기특행위，저시CaCu3Ti4O12연구중관찰도적신현상.I-V곡선설명발생전조돌변시양품온도여전압적관계만족선성관계，통과고저전조수온도적변화의합득도CaCu3Ti4O12적정립、정계격활능분별위0.06 eV、0.56 eV.①
We prepared CaCu3Ti4O12 ceramic samples sintered in air. The relationship between I-V curves and defects of CaCu3Ti4O12 were studied by the electrical conditioning method. The result shows that the resistance of CaCu3Ti4O12 decreases with electrical conditioning processes and a dramatic transition of resistance take places at a certain temperature and voltage,in which the I-V curve suddenly changes from nonlinearity to ohmic linearity. This is a new phenomenon observed for CaCu3Ti4O12. Besides,the resistance of grain and grain boundary in CCTO are separated by the relaxation of I-V characteristics. The critical temperature of I-V transition and the activation energy are also obtained respectively for the grain (0.06 eV) and grain boundary (0.56 eV) by fitting the experimental data.