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 |
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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。 |
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Index
Tables
Reference Sears, Zemansky,Young Table 27-1
索引表 参考 Sears, Zemansky, Young 表 27-1 |