序号

性能

Characteristics

单位

Unit

要求

Requirements

1

外观Appearance

硬度均匀，没有气泡和杂质，边缘切割整齐，无松散及分层现象。

Homogeneous hardness. No bubble and no impurity. Edge. With good order, no loose and hierarchic phenomenon

2

尺寸

Size

长Length

mm

约1000   App r o r. 1000

宽Width

300~600

3

厚度和公差、标称厚度

Thickness and nominal Standard thickness   0.3~2.0mm

mm

中值公差

Central value nominal

同一试样上厚度最大与最小之差

The difference between maximum and minimum of the same sample thickness

±0.02

0.04

4

云母含量Mica content

%

≥90

5

密度Density

g/cm3

≥2.2

6

电气强度Electrical intensity

Mv/m

≥20

7

体积电阻率/常态23±2℃

Volume resistance 23±2℃

Ω·cm

≥1010

8

抗渗出和位移性

Anti-ooze and anti-displacement

200℃

无胶粘剂小滴和云母位移

Have no gum to extrude and the mica move

9

弹性压缩Elastic compression

%

≤4

10

塑性变形Plastic shape change

%

≤5

11

起层率A liquation rate

%

≤3