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1、,第2章 固体的绝缘特性与介质的电气强度,Chapter 2 Insulation Characteristics and Electric Strength of Solid Dielectrics,固体介质广泛用作电气设备的内绝缘，常见的有绝缘纸、纸板、云母、塑料等，而用于制造绝缘子的固体介质有电瓷、玻璃、硅橡胶等。,Solid dielectrics are widely used as internal insulation of electric equipment. For example, insulating paper, paperboard, mica, plastic a
2、nd so on. Solid dielectrics such as electric ceramic, glass, and silicon rubber are used to make insulators.,电介质的电气特性，主要表现为它们在电场作用下的导电性能、介电性能和电气强度。,The electrical characteristics of dielectrics mainly contain conductivity, dielectric property and electric strength under the electric field.,它们分别以四个主要
3、参数，即电导率 （或绝缘电阻率 ）、介电常数 、介质损耗角正切 和击穿电场强度（简称击穿场强） 来表示。,They are denoted by the following four main parameters, conductivity (or resistivity ) , dielectric constant , dielectric constant tangent , and breakdown strength of electric field .,一切电介质在电场作用下都会出现极化、电导和损耗等电气物理现象。,Electric physical phenomena suc
4、h as polarization, conductance, and loss will take place when any dielectrics are under the electric field.,电介质极化的种类：,1.电子式极化 Electron polarization 2.离子式极化 Ion polarization 3.偶极子极化 Dipole polarization 4.夹层极化 Doubled-layered polarization,视频链接,视频链接,视频链接,Types of dielectric polarization,2.1 固体电介质的极化与损耗 2.1 Polarization and Loss of Solid Dielectrics 2.2 固体电介质的电导 2.2 Conductance of Solid Dielectrics 2.3 固体电介质的击穿 2.3 Breakdown of Solid Dielectrics 习题与思考题 Exercises and FAQs,本章内容 Contents in this section,
