摘要
采用常规的电子陶瓷工艺制备了Co0.04W0.96O3多晶陶瓷,并对样品进行了微观形貌、相结构及I-V特性测试分析,发现Co0.04W0.96O3多晶陶瓷存在着奇特的负微分电阻特性。微分电阻随电场变化的曲线图揭示了Co′W′′缺陷有着与众不同的特点,正是这种缺陷的存在使得多晶陶瓷具有负微分电阻特性。主要讨论了Co0.04W0.96O3多晶陶瓷负微分电阻特性的产生机制,并提出了二次势垒模型。
W0.96C00.0403 polycrystalline ceramic bulks were fabricated by conventional ceramic technique and the microstructure, phase structure and electrical properties were studied. The samples exhibit voltage-controlled differential negative resistance. The curve of differential resistance （dV/dI） with applied field reveals that Cow＇ defect has its own characteristics. It is this defect that makes W0.96 Co0.04O3 ceramic behaves negative differential resistance（NDR） characteristic. The mechanism inducing this phenomenon was discussed and the secondary barrier has been proposed.
出处
《电工材料》
CAS
2008年第1期6-9,共4页
Electrical Engineering Materials
基金
国家自然科学基金资助(50772092)
