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Insulating Metallized Ceramic
Product Description
The Metallized Ceramic Insulator is made from 95% alumina oxide,
which has glazed surface and can apply with the quite harsh environment
because they have good moisture preventing ability and insulating ability. The product has no blisters and impurities of dark on outer coating at the temperature up to +900 °C after
hot pressing, dry pressing, Iso-pressing.
Applications:high voltage relays,vacuum switching tubes,vacuum capacitors,vacuum interrupter based devices, such as interrupter, traveling wave tubes, X-ray tubes.
Materials Performance
|
Item |
Unit |
Performance |
||||||
Alumina ceramic |
steatite ceramic |
||||||||
90% |
92% |
95% |
96% |
||||||
|
Ceramic Body
|
Appearance |
Color |
- |
white,ivory white,brown,black |
White off-white |
||||
|
Mechanical Characters |
Bulk Density |
g/cm3 |
≥3.6 |
≥3.65 |
≥3.7 |
≥3..75 |
2.7 |
||
|
Water Absorption |
% |
0 |
0 |
||||||
|
Flexural strength |
MPa |
280 |
300 |
310 |
320 |
150 |
|||
|
(HV) Hardness |
GPa |
12 |
5.8 |
||||||
|
Thermal Characters |
Coefficient of linear thermal expansion |
20℃~800℃ ×10-6mm/℃ |
6.3~7.3 |
6.4~7.4 |
6.5~7.5 |
6.8~7.8 |
8.0 |
||
|
Thermal Conductivity |
W/(m.K) |
12 |
16 |
20 |
23 |
2 |
||
|
Electrical Characters |
Dielectric constant(1MHz) |
— |
9~10 |
9~10 |
9~10 |
10 |
7.5 |
||
|
Dielectric loss angle |
×10-4 |
≤6 |
≤5 |
≤4 |
≤3 |
8 |
|||
|
Dielectric Strength |
KV/mm |
15 |
20 |
24 |
28 |
18 |
|||
|
Metalized Ceramics |
Gas leakage coefficient |
Pa.m3/s |
≤10-8 |
- |
|||||
|
Volume resistivity |
Ω.cm |
≥1015 |
- |
||||||
|
Combined strength |
MPa |
≥120 |
- |
||||||
|
Thickness of Metal |
μm |
≥20 |
- |
||||||
Company Profile
Changsha Ultronic Ceramic Technology Co., Ltd. is located in Changsha City, the capital of Hunan Province.
Since its establishment in September 2010, Ultronic has been devoted to manufacturing alumina ceramics
and steatite ceramics for electric components and industrial ceramics. Now, we have the forming technologies
of hot pressing, dry pressing, injection molding, tape casting, and isostatic pressing. We also have the special
process of surface metallization, glazing, and polishing. Our main products include ceramic thermostat housing,
ceramic rod, metalized ceramic GDT tube, faucet cartridge ceramic disc, ceramic insulating plate and so on.
And we supply to leading companies in respective business, such as and so on.
Send Inquiry to This Supplier
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