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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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Brand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:CustomizedTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacumm packaging with export cartonSupply Ability:20,000pcs/monthPlace of Origin:ChinaProductivity:10,000pcs/monthWhat’s the principle of ceramic metallization? The metallization for ceramics mainly consists of molybdenum (Mo) and manganese (Mn) element, the manganese in the metallizing process acts as glass particles and the molybdenum play the role of metal... -
Unit Price:30~100USDBrand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:Standard or custom-madeTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacumm packaging with export cartonSupply Ability:100,000pcs/monthPlace of Origin:ChinaProductivity:50,000pcs/monthHigh Voltage Metalized Ceramics for Power Grid Tubes In order to resist super high voltage and high current, these kinds of metalized ceramic tubes are fomed by Isostatic pressing (ISO pressed), then a super dense ceramic body can be obtained. In... -
Brand: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 Purity Aluminum Oxide Metallized Ceramic Insulator Normally. the ceramic components in gas discharge tube (GDT) is made from high purity aluminum oxide, also called alumina ceramic. The metallized ceraemic insulator work as a key part in... -
Unit Price:0.08~10USDBrand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:CustomizedTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacumm packaging with export cartonSupply Ability:100,000pcs/monthPlace of Origin:ChinaProductivity:10,000pcs/monthWhy nickel plating cover on metallization of ceramics? Regarding metalized ceramics, an additional nickel plating is needed to cover on the metallization. Why does need nickel plating there? Firstly, it brings sufficient wettability of the Al2O3... -
Unit Price:50~300USDBrand: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/monthCeramic Metallized Cylinder for Traveling Wave Tubes The ceramic metallized cylinder is made from alumina ceramic with min. 95% purity. It can be shaped by ISO pressing, dry pressing or hot pressing. To meet the ceramic to the ceramic, the ceramic... -
Unit Price:0.95~5USDBrand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:CustomizedTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacumm packagingSupply Ability:100,000pcs/monthPlace of Origin:ChinaProductivity:10,000pcs/monthCustomized Metalized Ceramics For Electronics We manufacture a large number of customized metalized ceramics for high voltage and high current applications in electronics fileds. Most of these metalized ceramic components are made from high purity... -
Unit Price:5.5~50USDBrand: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/monthHigh Purity Alumina Metalized Ceramics For Electronics We produce a broad range of alumina metallized ceramics, mainly including purity 94.4%, purity 96% and purity 99%. The main shaping methods for the metalized ceramic insulator include dry... -
Unit Price:3~20USDBrand: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/monthMetallized Alumina Ceramics for Electrical Components We manufacturer a wide range of customized metallized ceramics for our clients, including metallized ceramic tube, metallized ceramic ring, metallized ceramic substrate, metallized ceramic body,... -
Unit Price:1.5~5USDBrand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:Standard or custom-madeTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacumm packagingSupply Ability:200,000pcs/monthPlace of Origin:ChinaProductivity:50,000pcs/month2 Pin Metallized Aluminum Oxide Ceramic Insulator We offer a wide range of many different kinds of 1 pin, 2 pin or multi-pin alumina metallized ceramic insulator. All of them can be built as per customers' special requirement. The main metallization... -
Unit Price:5~50USDBrand:Jinghui CeramicsMin. Order:Piece/PiecesModel No:JH.MC.xxxTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacumm packaging with export cartonSupply Ability:200,000pcs/monthPlace of Origin:ChinaProductivity:50,000pcs/monthMetallized Ceramic Alumina Holder We offer custom fabrication services for metallized ceramics, including typical metallized ceramic tube, metallized ceramic cylinder, metallized ceramic ring, metallized ceramic substrate, metallized end seals for... -
Unit Price:5~20USDBrand:Jinghui CeramicMin. Order:Piece/PiecesModel No:CustomizedTransportation:Ocean,Land,Air,Express,ExpressPackaging:Vacuum packagingSupply Ability:50000 pcs/monthPlace of Origin:ChinaProductivity:50000 pcs/monthMetallized Ceramics for Electrical and Electronic Devices Alumina ceramic is a common technical ceramic material. It has a low dielectric constant, low dielectric loss, and excellent electrical insulation properties. After ceramic metallization, it... -
Unit Price:30~200USDBrand: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/monthAl2O3 Alumina Ceramic Body for Vacuum Interrupter The alumina ceramic using in vacuum interruper requires superb electrical breakdown strength and idea gas tightness,so it's always shaped by isostatic pressed with excellent dense ceramic body. They...
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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.