Black Alumina Ceramic Insulator Corrosion Resistance Al2o3 Support

Use of alumina ceramics ：

99 alumina porcelain material is used to make high temperature crucible, refractory furnace tube and special wear-resistant materials, 95 alumina porcelain is mainly used as corrosion resistance, wear resistant parts.

Characteristics of alumina ceramics：

1. High hardness

2. Good wear resistance

3. Light weight

Main properties of alumina ceramics ：

1. good thermal conductivity
2. Insulation strength,
3. Low dielectric loss, dielectric constant is generally between 8-10;

颜色

Color

White

白色

White

白色

White

白色

Ivory White

象牙白

White

白色

体积密度

Volume density(g/cm3)

3.45

3.5

3.7

3.75

3.9

吸水率

Water Absorption

0

0

0

0

0

抗弯强度

Flexural Strength

300MPa

300MPa

320MPa

330MPa

330MPa

维氏硬度

Vickers hardness

1300

1400

1400

1800

1800

介电常数

Dielectric Constant (at 1MHZ 25℃)

10

10

10

10

10

弹性模量

Modulus of elasticity

350GPa

350GPa

350GPa

370GPa

370GPa

热导率

thermal conductivity (30℃)

18W/(m·K)

24W/(m·K)

24W/(m·K)

25W/(m·K)

28W/(m·K)

体积电阻率

Volume resistivity

10¹⁴Ω•cm

10¹⁴Ω•cm

10¹⁴Ω•cm

10¹⁴Ω•cm

10¹⁵Ω•cm

介电强度

Dielectric strength

20KV/mm

20KV/mm

20KV/mm

20KV/mm

30KV/mm