氧化铝陶瓷性能指标
项目 |
测试条件 |
材料牌号 |
|||||
A-75 |
A-90 |
A-95 |
A-99 |
A-99.5 |
|||
体积密度 |
|
>3.2 |
>3.40 |
>3.60 |
>3.70 |
>3.75 |
|
抗折强度 |
|
2000 |
2300 |
2800 |
3000 |
3000 |
|
线膨胀系数 |
20-100℃ |
≤6 |
- |
- |
- |
- |
|
20-500℃ |
- |
6.3-7.3 |
6.5-7.5 |
6.5-7.5 |
6.5-7.3 |
||
20-800℃ |
- |
6.3-7.3 |
6.5-8 |
6.5-8 |
6.5-8 |
||
导热系数 |
|
- |
- |
- |
- |
- |
|
介电常数 dielectric constant |
1 MHz 20℃ |
≤9 |
9-10 |
9-10 |
9-10.5 |
9-10.5 |
|
500℃ |
- |
- |
9-10 |
- |
- |
||
10GHz 20℃ |
- |
9-10 |
9-10 |
9-10.5 |
- |
||
介质损耗角正切值The dielectric loss tangent values
|
1 MHz 20℃ |
≤10 |
≤6 |
≤4 |
≤2.5 |
≤1.5 |
|
500℃ |
- |
-30-40 |
- |
- |
- |
||
10GHz 20℃ |
- |
- |
≤10 |
≤6 |
- |
||
体积电阻率Volume resistivity
|
100℃ |
>1012 |
>1013 |
>1013 |
>1013 |
>1014 |
|
300℃ |
- |
>1010 |
>1010 |
>1010 |
>1012 |
||
500℃ |
- |
- |
108 |
109 |
1010 |
||
击穿强度disruptive strength |
|
20 |
15 |
15 |
15 |
15 |
|
化学稳定性 |
1:9Hcl |
- |
- |
≤7.5 |
≤0.7 |
- |
|
10%NaOH |
- |
- |
≤0.2 |
≤0.1 |
- |
||
气孔率 |
- |
- |
- |
- |
- |
15-30 |
95瓷普通抛光碗(普通市场里发) | 0.28不含税 | 带碗壳 |
95瓷精抛光碗(整机厂装新机用) | 0.39不含税 | 带碗壳 |
99瓷精抛碗(高速丝用) | 0.68不含税 | 带碗壳 |