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Metallized Ceramic Insulator

We manufacture custom Metallized Alumina Ceramics for ultra-high vacuum feedthroughs, vacuum isolator flanges, gas discharge tubes, grid tubes, vacuum interrupters, vacuum capacitors, and similar applications where the ceramic-to-metal joint requires ideal hermeticity and excellent bonding strength.
 
 
1. In electric vacuum devices, ceramics and metal components must be brazed to achieve special functions such as vacuum sealing, electrical insulation, microwave transmission, and microwave absorption. Given the considerable difference in thermal expansion coefficients between ceramics and metal alloys, a layer of metal needs to be deposited on the surface of the ceramic so that its specific surface has the characteristics of both ceramics and metals, thereby achieving direct brazing together.
 
2. An inert gas is usually filled in the electric vacuum device to reach a specific vacuum level. If the airtightness of the ceramic and metal welding components is not good enough, the reliability of the entire vacuum device will fail. Therefore, a layer of nickel, silver, and gold is plated on the surface of the metal layer to enhance the welding wettability, which can improve the welding strength and airtightness after brazing.
 
3. Alumina ceramics have many electrical and physical performance advantages that metal alloys lack, such as good insulation strength, low dielectric loss, high mechanical strength, high-temperature resistance, low thermal expansion coefficient, fast heat dissipation, etc. Alumina Metallized Ceramics are used for sealing, significantly improving vacuum devices' reliability and extending their life.
 
We specialize in molybdenum (Mo-Mn) and Tungsten (W) thick-film metallization on 94%, 96%, and 99% alumina Ceramic Components. The main metallization methods used are screen printing or vacuum-like sputtering, followed by electroplating or electroless plating to cover the metallized surface with nickel, gold, silver, or tin. This way, the ceramic can be welded with oxygen-free copper, Kovar, stainless steel, and other alloys.
 
We can customize different types of ceramic metallized components and produce products from small to large sizes. The minimum outer diameter is 2.0mm with a height of 0.80mm, and the maximum outer diameter is 200mm. If you are looking for a better solution for metallized Ceramic Insulators or to develop new products, don't hesitate to contact us today!

  • Brand:
    Jinghui Ceramics
    Min. Order:
    Piece/Pieces
    Model No:
    Customized
    Transportation:
    Ocean,Land,Air,Express,Express
    Packaging:
    Vacumm packaging with export carton
    Supply Ability:
    200,000pcs/month
    Place of Origin:
    China
    Productivity:
    50,000pcs/month
    Pink 94.4% Al2O3 Alumina Ceramic Metallization Body Our factory offers both thick and thin film technologies in metallizing process on the ceramic parts. The regular metallization layer is molybedenum/managnese(Mo/Mn) and Tungsten(W) as the base...
  • Unit Price:
    0.25~5USD
    Brand:
    Jinghui Ceramics
    Min. Order:
    Piece/Pieces
    Model No:
    Customized
    Transportation:
    Ocean,Land,Air,Express,Express
    Packaging:
    Vacumm packaging with export carton
    Supply Ability:
    1000000pcs/month
    Place of Origin:
    China
    Productivity:
    500000pcs/month
    Metallization Ceramic Base with Gold Plating for Coil With the properties of high purity alumina ceramic and high frequency anti-high temperature, chemical resistant and non-deformation at any harsh working conditions, metallized ceramic base are...
  • Unit Price:
    20~100USD
    Brand:
    Jinghui Ceramics
    Min. Order:
    Piece/Pieces
    Model No:
    Customized
    Transportation:
    Ocean,Land,Air,Express,Express
    Packaging:
    Vacumm packaging with export carton
    Supply Ability:
    2,000,000pcs/month
    Place of Origin:
    China
    Productivity:
    500,000pcs/month
    Glazed Alumina Metallized Ceramic Tubing Glazed alumina metallized ceramic tubing is a very special advanced ceramic parts in the high-voltage and high current electronic and electrical application. A metallic layer deposited on the surface of the...
  • Brand:
    Jinghui Ceramics
    Min. Order:
    Piece/Pieces
    Model No:
    Customized
    Transportation:
    Ocean,Land,Air,Express,Express
    Packaging:
    Vacumm packaging with export carton
    Supply Ability:
    100,000pcs/month
    Place of Origin:
    China
    Productivity:
    50,000pcs/month
    What is metallization of ceramics? Due to the significant difference of coefficient of thermal expansion between ceramics and metals, It's hardly impossible to bond ceramic to metal directly over in the past many years. In order to get this biggest...
  • Brand:
    Jinghui Ceramics
    Min. Order:
    Piece/Pieces
    Model No:
    Customized
    Transportation:
    Ocean,Land,Air,Express,Express
    Packaging:
    Vacumm packaging with export carton
    Supply Ability:
    200,000pcs/month
    Place of Origin:
    China
    Productivity:
    50,000pcs/month
    Alumina Ceramic Tube with Mo/Mn Metallization Due to ceramic tube with Mo/Mn metallization can be brazed with metal parts directly, sometimes, a few customers just request alumina ceramic tube to be Mo/Mn metallized. This metallized ceramic tube is...
  • Unit Price:
    USD 0.5 - 1 / Piece/Pieces
    Brand:
    Jinghui Ceramics
    Model No:
    Standard or custom-made
    Transportation:
    Ocean,Land,Air,Express,Express
    Packaging:
    Vacumm packaging with export carton
    Supply Ability:
    200,000pcs/month
    Place of Origin:
    China
    Productivity:
    50,000pcs/month
    Metallic Coating Ceramic Insulator for Gastriode Ceramic insulator for gastriode is made of min. 95% alumina, . We have a selective forming processes to produce them according to customer's specific application, specific requirement, such as dry...
  • Brand:
    Jinghui Ceramics
    Min. Order:
    Piece/Pieces
    Model No:
    Customized
    Transportation:
    Ocean,Land,Air,Express,Express
    Packaging:
    Vacumm packaging with export carton
    Supply Ability:
    50,000pcs/month
    Place of Origin:
    China
    Productivity:
    50,000pcs/month
    Metallized Ceramics Insulator for Vacuum Electronic Devices The most extensive metallization process for brazing ceramics is molybdenum-maganese method. The metallic layer can be printed on the ceramic body via silk screen, brush, pad way, then the...
  • Unit Price:
    0.85~20USD
    Brand:
    Jinghui Ceramics
    Min. Order:
    Piece/Pieces
    Model No:
    Customized
    Transportation:
    Ocean,Land,Air,Express,Express
    Packaging:
    Vacumm packaging with export carton
    Supply Ability:
    200,000pcs/month
    Place of Origin:
    China
    Productivity:
    50,000pcs/month
    High Precision Alumina Metallized Ceramic Disk Our facility supplys numerous custom alumina metallized ceramic disk for using based on vacuum interrupting devices and similar applications where ceramic to metal joints of and hermeticity are...
  • Brand:
    Jinghui Ceramics
    Min. Order:
    Piece/Pieces
    Model No:
    Customized
    Transportation:
    Ocean,Land,Air,Express,Express
    Packaging:
    Vacumm packaging with export carton
    Supply Ability:
    2,000,000pcs/month
    Place of Origin:
    China
    Productivity:
    500,000pcs/month
    Prime features of metallized ceramic components: 1. Readily accepts Mo/Mn or W metalization for high-temperature brazing of metal to ceramic assemblies 2. Excellent bonding strength over 150 MPa and with ideal leakage rate less than ≤1×10-11 Pa•m3 /...
  • Brand:
    Jinghui Ceramics
    Min. Order:
    Piece/Pieces
    Model No:
    Customized
    Transportation:
    Ocean,Land,Air,Express,Express
    Packaging:
    Vacumm packaging with export carton
    Supply Ability:
    200,000pcs/month
    Place of Origin:
    China
    Productivity:
    50,000pcs/month
    What are ceramics metallization? To solve advanced ceramics to the metals bonding problem, a metallic layer, mainly including molybedenum and tungsten, will be applied on the designated surface of the ceramic body, a very thin metal film on ceramic...
  • Unit Price:
    0.5~5USD
    Brand:
    Jinghui Ceramics
    Min. Order:
    Piece/Pieces
    Model No:
    Customized
    Transportation:
    Ocean,Land,Air,Express,Express
    Packaging:
    Vacumm packaging with export carton
    Supply Ability:
    2000,000pcs/month
    Place of Origin:
    China
    Productivity:
    500,000pcs/month
    Ceramic Insulator for Switch Igniter Discharge Tube Ceramic insulator for switch igniter discharge tube is made of alumina oxides with min. 95% purity, It can be shaped via dry pressing, hot pressing, ISO pressing. In common case, both...
  • Unit Price:
    USD 30 - 50 / Piece/Pieces
    Brand:
    Jinghui Ceramics
    Min. Order:
    Piece/Pieces
    Model No:
    Customized
    Transportation:
    Ocean,Land,Air,Express,Express
    Packaging:
    Vacumm packaging with export carton
    Supply Ability:
    100,000pcs/month
    Place of Origin:
    China
    Productivity:
    20,000pcs/month
    High Precision Large Size Metallized Ceramic Tube We fabricate a great many of customized refractory metallized alumina ceramics for use in vacuum breaker, vacuum electron tubes, vacuum interrupters, power grid tubes and similar applications where...
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Quality of Metal-Ceramic Insulator Package

Airtightness is one of the important indicators to measure the quality of Metal-Ceramic Insulator Package. Leakage is the main reason for the failure of Metal-Ceramic Insulator Package.

1. Reasons Related to Ceramic Insulators:
a. There may be problems in some links of the ceramic insulator production process, which may cause leakage of the ceramic insulator itself.
b. There may be problems with the metallization treatment of the sealing surface (the contact surface between ceramic and metal parts) of the ceramic insulator before welding, such as the metallization layer falling off and exposing ceramic. In this way, the liquid solder cannot effectively wet the exposed ceramic, and thus cannot fill the gap between the ceramic and the metal parts, causing leakage.
c. The matching size of ceramic insulator and metal parts is too small, so the gap with the metal parts becomes larger, and the solder cannot fill the gap, causing leakage.

2. Reasons Related to the Brazing Process:
a. When the temperature is low or the holding time is short, the solder has not flowed enough, causing leakage.
b. When the temperature is high or the holding time is long, the solder is scattered more, and the remaining solder cannot fill the gap densely, causing leakage.

Measures to Improve Airtightness
1. Strictly follow the relevant requirements during the production and brazing of ceramic insulators to reduce the possibility of leakage caused by improper ceramics and brazing process.
2. Before welding, ceramic insulators with defects such as exposed ceramic on the sealing surface and small size should be picked out as much as possible, so as to improve the brazing yield rate to a certain extent.
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