Bilingual edition: English is preserved and Chinese follows each unit. Terminology uses the confirmed v20260916 glossary; automated semantic review remains traceable.
中英双语版:英文原文完整保留,中文紧随对应单元;术语采用 v20260916 确认表,自动语义审校结果可追溯。

Dielectric Constants at 20°C

20°C时的介电体常数
Material
材料
Dielectric Constant
介电体常数
Vacuum
真空
1
Glass
玻璃
5-10
Mica
云母
3-6
Mylar
Mylar(专名或术语)
3.1
Neoprene
氯丁橡胶
6.70
Plexiglas
聚甲基丙烯酸甲酯
3.40
Polyethylene
聚乙烯
2.25
Polyvinyl chloride
聚氯乙烯
3.18
Teflon
特氟龙
2.1
Germanium
16
Strontiun titanate
锶钛酸盐
310
Titanium dioxide (rutile)
二氧化钛(金红石)
173 perp
86 para
173 垂直 86 平行
Water
80.4
Glycerin
甘油
42.5
Liquid ammonia(-78°C
液态氨(-78°C
25
Benzene
2.284
Air(1 atm)
空气(1个大气压)
1.00059
Air(100 atm)
100大气压的空气
1.0548
The dielectric constant k is the relative permittivity of a dielectric material. It is an important parameter in characterizing capacitors. It is unfortunate that the same symbol k is often used for Coulomb's constant, so one must be careful of this possible confusion. It is more typical of physics texts to use the form 1/4πε0 for Coulomb's constant.

介电体的介电常数k是介电体材料的相对电容率。它在表征电容器时是一个重要的参数。不幸的是,同一个符号k也常用于库仑常量,因此必须小心避免这种可能的混淆。在更典型的物理学教材中,常使用1/4πε₀来表示库仑常量。
Electric and magnetic constants
电和磁常数
Dielectric constants of semiconductors
半导体的介电常数
Index

Tables

Reference
Sears, Zemansky,Young
Table 27-1
索引表 参考 Sears, Zemansky, Young 表 27-1
  HyperPhysics***** Electricity and Magnetism
HyperPhysics ***** 电学和磁学
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