Conditioner & amplifier
Aluminium Oxide (Al2O3) Ceramics Material
Typical Capability of 95% Al2O3
Content
of Al2O3 |
95
% |
Density |
3.6
g/cm 3 |
Hardness |
>86
HRa |
Porosity
Rate |
0.08 |
Water
Absorption |
0.02 |
Flexural
Strength |
330
MPa |
Max.
Use Temperature |
1100-1600
℃ |
95% Al2O3 is a versatile ceramic material with many practical applications. We can provide ceramic products with external roughness:0.2-0.3, flatness: <= 0.6u, toleranc:+/-0.03mm, Max. diameter:80mm, length:<100mm products. We are specialized in supplying all kinds of products according to customers’ requirement.
Typical Capability of 99%Al2O3
| Type | Al2O3 | Reinforced Al2O3 |
| Content (%) | 99.9 | Al 87, Zr 13 |
| Density (g/cm 3 ) | 3.9~4.0 | 4.0~4.1 |
| Hardness (HRA) | 80~90 | 90~92 |
| Flexural Strength (MPa) | 300 | 350 |
Proper process leads to a microstructure in which nanosized zirconia particles are uniformly dispersed in alumina. The size of zirconia particles can be increased by controlling the sintering cycle. Excellent strength and toughness are obtained.
Specification of Alumina
Material
|
99%Al2O3
|
95%Al2O3
|
92%Al2O3
|
75%Al2O3
|
|||
Material
Characteristics
|
Density
|
g/cm 3
|
3.9
|
3.7
|
3.4-3.7
|
3.2-3.4
|
|
| Water
Absorption
|
%
|
0
|
0
|
<0.5
|
<1
|
||
| Sintering
Temp.
|
℃
|
1750
|
1650
|
1580
|
1360
|
||
Mechanical |
Vickers
Hardness
|
Mohs
|
12
|
10
|
12
|
10
|
|
| Flexural
Strength
|
kg/mm 2
|
3300
|
3000
|
2900
|
3800
|
||
| Compressive
Strength
|
kg/mm 2
|
28000-30000
|
25000-28000
|
25000
|
20000
|
||
Thermal
Characteristics
|
Thermal
Conductivity
|
|
31.4
15.9
|
21.8
12.6
|
15-20
|
6-7
|
|
| Max.
Use Temp.
|
℃
|
1600
|
1500
|
1500
|
1300
|
||
| Coefficient
of linear Thermal Expansion
|
x10-6/℃
|
6.4-8.2
|
5.5-7.5
|
7-7.6
|
7.3
|
||
Electrical |
Dielectric
Constant
|
(E)1MHz
|
9.2-11
|
9.4-9.8
|
9.2
|
8.3-9
|
|
Dielectric
Loss Angle
|
tg δ1MHz
|
1-1.5
|
2-3.1
|
4
|
5-10
|
||
| Volume
|
|
Ohm﹒cm
|
>10 14
10 14
10 11
|
>1014
1013
3.1x1010
|
>1014
1013
1010
|
>1014
1012
109
|
|
Dielectric
Constant
|
KV/mm
|
10
|
10
|
10
|
10
|
||
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