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
锗
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
水
80.4
Glycerin
甘油
42.5
Liquid ammonia(-78°C
液态氨(-78°C
25
Benzene
苯
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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