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限流用陶瓷及有机PTCR元件的可靠性研究 被引量:1

On the Reliability of the Ceramic Resistor and Organic Resistor with Positive Temperature Coefficient for the Current Limiter
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摘要 对用于程控交换机的陶瓷和有机PTCR限流元件进行了温度循环、电流冲击及耐雷击波冲击等几项可靠性试验,对两种限流元件失效的理化模型进行了初步的分析。在失效判据电阻率变化相同及试验频率相同的情况下,陶瓷元件寿命优于有机PTCR元件。 emperature cycl,current impulse and lightning stroke tests on the reliability of boththe ceramic resistor and the polymer PTCR elements used for current limiting in the program-controlled exchange have been carried out;Factors affecting the reliability and con-tributing to the failure of both materials have been analyzed.Under the condition of identicalrate of change of resistivity and identical test frequency,the lifetime of the ceramic PTCR el-ements is found to be longer than that of the organic elements.
出处 《华中理工大学学报》 CSCD 北大核心 1995年第A01期177-181,共5页 Journal of Huazhong University of Science and Technology
关键词 热敏电阻 限流元件 陶瓷 聚合物 程控交换机 hermistor with positive temperature coefficient current lirniting elements ce-ramics polymer
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参考文献3

  • 1周东祥,PTC材料及应用,1989年
  • 2周东祥,电子材料与元件测试技术,1989年
  • 3Hu K R,Ferroelectrics,1986年,68卷,1期,115页

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