Analysis of ferroelectric characteristics and HV pulse experiments On X7R ceramic capacitors

被引：0

作者：

Dai, L ^{[1
]}

Lin, FC ^{[1
]}

Zhu, ZF ^{[1
]}

Li, J ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Lab High Voltage, Wuhan 430074, Peoples R China

来源：

2004 ANNUAL REPORT CONFERENCE ON ELECTRICAL INSULATION AND DIELECTRIC PHENOMENA | 2004年

关键词：

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

X7R ceramic material is regarded as a sound developing direction to produce high energy density capacitors owing to its high dielectric constant (from 3000 to 10(5)) and moderate temperature characteristics. The most important characteristics of X7R is ferroelectricity. In this paper, some samples of HV X7R multilayer ceramic capacitors (MLC) with large capacitance have been made and their electrical behaviors in pulsed discharge circuit have been tested. On the basis of the thorough interpretation of the ferroelectricity, the paper analyzes the special electrical characteristics of MLC, which includes the change of capacitance, particular discharge wave, high dielectric loss, and the curve of life. The results of a series of experiments of samples coincided with the above theoretical analysis. In conclusion, the MLC of X7R has good discharge wave, and stable life curve. Some measures must be taken to cool the capacities due to their high dielectric loss.

引用

页码：97 / 100

页数：4