| Model NO. | Customized |
|---|---|
| Material | 96%, 99% and 99.5% Alumina |
| Color | White, Beige, Pink |
| Application | Refractory, Structure Ceramic, Industrial Ceramic, Brazing |
| Surface Treatment | Polished, Glazed |
| Usage | for Ceramic to Metal Joint Technology |
| Transport Package | Vacuum Packaging with Desciant |
Since both significant difference of thermal expansion coefficient and lack of wettability between advanced ceramics and metals , it’s hardly impossible to braze such 2 materials directly. Ceramic metallization is a one of reliable technology to achieve ceramic-to-metal joining.In common case, a certain metallic layer, like molybdenum (Mo/Mn) or tungsten(W), would be applied on the ceramic surface , then cured under high temperature reducing or vacuum atmosphere. The metallic layer therewith adheres to the surface of ceramic parts tightly , it let the ceramic surface have metallic properties and achieve the connection of metal and ceramic by means of high-temperature brazing accordingly. The ceramic parts with this special surface treatment are called ” Metallized ceramics”. These technical engineered ceramics are commonly used in many applications, like electronics, high-vacuum technology, medical technology, sensor technology.
The metalized ceramics we manufacture are characteristic of excellent bonding strength, ideal air tightness after brazing, super mechanical, excellent electrical insulation, exceptional thermal features. Sometimes, the designated section would be glazed or polished to enhance the mechanical strength and electrical breakdown strength, especially in high-voltage applications.
1.Ceramic body + silver (Ag) plating directly 2.Ceramic body + molybdenum (Mo/Mn) metallization only
3.Ceramic body + molybdenum (Mo/Mn) + nickel (Ni) plating 4. Ceramic body + tungsten (W) + gold (Au) plating 5.Ceramic body + molybdenum (Mo/Mn) + nickel (Ni) + silver (Ag) plating
| Leak rate | ≤1×10-11 Pa•m³ / s | Metal layer tensile strength | ≥ 150Mpa |
| Volume Resistivity | ≥108Ω•cm | CTE | (6.5 ~ 8.0) × 10-6 /°C |
| Insulation strength | ≥18kV/mm (D•C) | Dielectric constant | 9~10(1MHz, 20°C) |
| Cosmetic quality: 1. No cracks, no bubbles; 2. Evenly distributed glaze; 3. No contamination | |||
The type of alumina metallized ceramics are not only suitable for high-voltage feedthroughs (20~100kV) , but also various of low-voltage feedthroughs (up to 12kV),and RF feedthroughs used in CO2 lasers.
Jinghui Ceramic
We will contact you within 1 working day, please pay attention to the email with the suffix “@jinghui0738.com”.
