一、前言近来,工业界对高分子材料和精密陶瓷非常关注,从基础到应用都在进行着广泛的研究和开发。目前正在研究提高测量准确度和开发、引进新的试验方法。众所周知,不管固体或液体,所有材料在电特性方面,大致可分为:导体、绝缘体和半导体。高分子材料和大部分陶瓷是作为绝缘物质使用的。对于直流信号,电阻系数就成为最 First, the preface Recently, the industry is very concerned about the polymer materials and precision ceramics, from the foundation to the application are undergoing extensive research and development. Research is currently under way to improve measurement accuracy and development, introducing new test methods. It is well-known that all materials, regardless of solid or liquid, can be broadly classified into electrical properties, including conductors, insulators and semiconductors. Polymeric materials and most ceramics are used as insulating materials. For DC signals, the resistivity becomes the most