ZTA Seal Rings
Abstract
ZTA Seal Ring has higher flexural strength and fracture toughness, and excellent wear resistance. Supreme Ceramic Materials (SCM) supplies ZTA Seal Rings with high quality and fast delivery, and customized products area also available.
ZTA Seal Rings Description
Zirconia Toughened Alumina Ceramics (referred to as composite ceramics, ZTA) has the characteristics of whiteness, corrosion resistance, and good chemical stability. Alumina has a high hardness and the toughness of zirconia is good. The two materials form an excellent composite of high strength and high toughness, and the application is more widely used. ZTA ceramic has higher flexural strength and fracture toughness at normal temperature, so zirconia toughened ceramics have excellent wear resistance. The specific ratio of the two materials can be adjusted according to the actual use requirements of the user. The performance of zirconia toughened alumina ceramics is better than that of 99 alumina ceramics, and the price is much lower than that of zirconia ceramics; many alumina ceramics are not suitable for the occasion, which shows better cost performance than zirconia ceramics.
Specification of ZTA Seal Rings
|
|
Condition |
Unit |
ZTA Substrate |
|
|
ZTA |
||||
|
Material |
- |
- |
Al2O3/ZrO2 |
|
|
Color |
- |
- |
White |
|
|
Bulk Density |
- |
g/㎤ |
4 |
|
|
Surface Roughness Ra |
- |
µm |
0.2 |
|
|
Reflectivity |
0.3-0.4mmt |
% |
80 |
|
|
0.8-1.0mmt |
90 |
|||
|
Mechanical |
Bending Strength |
3-point method |
MPa |
700 |
|
Modulus of Elasticity |
- |
GPa |
310 |
|
|
Vickers Hardness |
- |
GPa |
15 |
|
|
Fracture Toughness |
IF method |
MPa･m1/2 |
3.5 |
|
|
Thermal |
Coefficient of Thermal Expansion |
40-400°C |
10-6/K |
7.1 |
|
40-800°C |
8 |
|||
|
Thermal Conductivity |
25°C |
W/(m･K) |
27 |
|
|
300°C |
16 |
|||
|
Specific Heat |
25°C |
J/(㎏･K) |
720 |
|
|
Electrical |
Dielectric Constant |
1MHz |
- |
10.2 |
|
Dielectric Loss Factor |
1MHz |
10-3 |
0.2 |
|
|
Volume Resistivity |
25°C |
Ω･㎝ |
>1014 |
|
|
Breakdown Strength |
DC |
㎸/㎜ |
>15 |
|
