摘要
用固相反应法制备了CaCu_3Ti_4O_(12)样品,对其介电常数、电容、电阻及击穿电压特性进行了系统研究.结果表明:预烧温度950℃和1 050℃烧结样品具有较高的转变温度(110～150K)和较高的介电常数(104);样品保温时间为6 h时,电容值达到最大为59.2 nF,电阻值最小为0.065 MΩ;在5～20 MPa压力范围,样品的电容值与压力关系呈线性关系.在不同条件下制备的CaCu_3Ti_4O_(12),其直流电压与电流关系大致相同且击穿电压非常高.在同一电压下,电流与试样的厚度成反比.由此推断,CaCu_3Ti_4O_(12)的直流电压与电流的关系,可能与材料的本身结构有关.
CaCu3Ti4O12 were prepared by solid - state reaction method in order to study the dielectric constant, capacitors,resistors and the breakdown voltage of CaCu3Ti4O12. The results showed that when the pre - burning temperature were at 950Ω and 1050Ω,the sintered sample had a high temperature（110- 150 K） and high dielectric constant （104） .When the samples holding time were about 6 hr, the maximum capacitance was 59.2 nF, the minimum resistance 0.065 M Ω. At the pressure of 5 - 20MPa, the relationship between capacitance and pressure was linear. For DC, the same relation holds, with the breakdown voltage being very high. But for the same voltage, the current is inversely proportional to the thickness of the sample. Therefore, it can be inferred that CaCuaTi4O12 DC voltage and current relationship may be related to the structure of the material.
出处
《绍兴文理学院学报》
2008年第9期7-11,共5页
Journal of Shaoxing University
基金
浙江省新苗计划项目资助(2007R40G2170040)
作者简介
蔡勇（1985-），男，浙江乐清人，从事巨介电材料研究．
