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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!
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Unit Price:5.5~50USDBrand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:CustomizedTransportation:Air,Express,ExpressPackaging:Vacumm packagingSupply Ability:100,000pcs/monthPlace of Origin:ChinaProductivity:50,000pcsWe manufacture a diversity of metallized ceramic insulators with the customized specifications. The metallized ceramics are commonly made of high-purity alumina ceramic via dry pressing, ceramic injection molding, ISO pressing, or hot pressing.... -
Brand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:CustomizedTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacumm packagingSupply Ability:100,000pcsPlace of Origin:ChinaProductivity:50,000pcsTo achieve the bonding and brazing purpose between ceramic and metal and ceramic to ceramic, a thin metallic coating is applied to the designated section of ceramic parts, including the inner diameter, outer diameter, end surface, or flat surface.... -
Unit Price:15~50USDBrand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:CustomizedTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacumm packaging with export cartonSupply Ability:200,000pcs/monthPlace of Origin:ChinaProductivity:50,000pcs/monthHigh Current Vacuum Metalized Ceramic Insulator To achieve the ceramics to the metals joining application, a metal coating will be applied on the specific surface of the ceramic component, a metal film on ceramic insulator will be formed after... -
Brand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:Standard or custom-madeTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacumm packaging with export cartonSupply Ability:200,000pcs/monthPlace of Origin:ChinaProductivity:50,000pcs/monthMetalized Alumina Relay Ceramics Relay ceramics have to withstand very high voltage, high current, also very high mechanical strength is must. Alumina ceramic is an ideal choice as the raw material for making relay ceramics.In the current fashion... -
Unit Price:1.5~10USDBrand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:CustomizedTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacumm packaging with export cartonSupply Ability:500,000pcs/monthPlace of Origin:ChinaProductivity:100,000pcs/monthHigh Purity Metallized Alumina Ceramic Washer Metallized ceramic washer is commonly made out of high purity alumina ceramic, then a metal plating will be applied on the certain section as per customers' requirement with high-temperature sintering.... -
Unit Price:30~200USDBrand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:CustomizedTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacumm packagingSupply Ability:200,000pcs/monthPlace of Origin:ChinaProductivity:50,000pcs/monthHigh Voltage Vacuum Ceramic Tube for Electron Tube We supply a variety of custom refractory metallized alumina ceramics for use in vacuum interrupters, power grid tubes, x-ray tubes and similar applications where ceramic-to-metal, ceramic to ceramic... -
Unit Price:1.5~20USDBrand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:CustomizedTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacumm packaging with export cartonSupply Ability:2,000,000pcs/monthPlace of Origin:ChinaProductivity:500,000pcs/monthWhat are Alumina Metalized Ceramics? Many technologies have been used to join alumina ceramics to itself, or alumina ceramics to metals, but the main challenge is the poor wettability of ceramics by filler alloys. It's hardly impossible to braze... -
Unit Price:1.2~5USDBrand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:CustomizedTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacumm packaging with export cartonSupply Ability:2,000,000pcs/monthPlace of Origin:ChinaProductivity:500,000pcs/monthCeramic Metallization Disc for Metal to Ceramic Joining Ceramic metallized disc coated a metal plating on the certain area of both sides, or single side, and then cure it in high temperature to form thin/ thick film. It plays a important role in... -
Unit Price:1.5~5USDBrand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:CustomizedTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacumm packagingSupply Ability:200,000pcs/monthPlace of Origin:ChinaProductivity:50,000pcs/monthWhy do ceramics metalized? Technical ceramics offer signicantly different strengths in comparison with metals, in order to combine the strength of both materials, sometimes, it has to braze ceramic to metal together to use in the practical... -
Unit Price:1.5~5USDBrand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:CustomizedTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacumm packaging with export cartonSupply Ability:2,000,000pcs/monthPlace of Origin:ChinaProductivity:500,000pcs/monthFine Ground Alumina Ceramic Metallized Insulator To meet metal to ceramic and ceramic to ceramic jointing technology, a metallic coating will be applied on the specific surface of ceramic insulator, then it can be achieve the jointing through... -
Unit Price:10~50USDBrand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:CustomizedTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacumm packaging with export cartonSupply Ability:100,000pcs/monthPlace of Origin:ChinaProductivity:50,000pcs/monthGlazed Customized Alumina Metalized Ceramics For Electronics The specification of metallized ceramics 1. Material options: 95~99% alumina ceramic, zirconia ceramic, beryllia oxide, aluminum nitride ceramic 2. Dimension capability: Max. OD up to... -
Unit Price:15~100USDBrand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:CustomizedTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacumm packagingSupply Ability:200,000pcs/monthPlace of Origin:ChinaProductivity:50,000pcs/monthHigh Precision Customized Metallized Ceramic Insulator Metallized ceramic insulator plays a very important role in many different vacuum devices because of their remarkable electrical, mechanical and thermal properties. We are able to produce a...
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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.
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.