IPDB › China Industry › Industrial Equipment & Components
China, Chinese Alumina Mo Mn Ceramic Metallization Insulator for Vacuum Power Feedthroughs1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
Industrial Ceramic ProductsCeramic InsulatorCeramic Metallization InsulatorCeramic Metallization
SHENZHEN JINGHUI INDUSTRY LIMITED
Preview:
Product Description Alumina Mo Mn Ceramic Metallization insulator for Vacuum Power Feedthroughs Product DescriptionWhat is Ceramic Structural PartsCeramic structural parts are precision ceramic parts obtained by using high-purity special ceramic materials, through rigorous structural design and appropriate forming method, and processed. Is it Good to Use Ceramic Structural Parts?You can see the advantages of ceramic structural parts through the comparative table between ceramic, metal, and polymer below.PropertyCeramicMetalPolymerHardnessHighLowBadElastic ModulusHighGoodLowHigh Temperature ResistanceHighLowBadThermal ExpansionLowGoodGoodMalleabilityLowGoodGoodCorrosion ResistanceGoodLowLowElectrical ConductivityLowGoodLowDensityAverageHighLowThermal ConductivityAverageGoodLow Why do Metallization on the Surface of Ceramic Structural Parts?Ceramic metallization is the combination of two materials with different properties. The ceramic material has the characteristics of high strength, high hardness, high-temperature resistance, corrosion resistance, and good insulation performance, while the metal material has the characteristics of good thermal conductivity, strong electrical conductivity, and good ductility.The combination of ceramic and metal materials not only achieves complementary advantages in performance but also broadens their respective application ranges. Production ProcessOur product production is mainly divided into 3 steps, forming - finishing - and metallization. The production flow chart is shown below. Forming FinishingMetallizationWe will choose the most suitable forming method on the basis of saving costs and ensuring quality.In order to achieve the precision of the product, most ceramic structural parts need further finishing treatment after the sintering process.Metallization of ceramics refers to the creation of thin metal layers (films) on the surface of ceramics. After the surface of the ceramic material is metallized, it has both the characteristics of ceramics and the properties of metal. Which Metallization Processes We Support?Jinghui has been focusing on the production and processing of precision ceramic structural parts for more than ten years. Our metallization options include Ag, Mo-Mn W, etc., and the surface coatings include Au, Ni, Al, Ti, Cu, Cr, etc.Our products are widely used in optical communications, medical, lighting, machinery, aviation, aerospace, petroleum, chemical, textile, consumer electronics, electrical appliances, smart wear, and other fields.Introduction to Mo-Mn MethodThe metal powder sintering method is the most widely used ceramic metallization method in electric vacuum technology. According to the different types of metal powder, it can be divided into two types: refractory metal and non-refractory metal. The former is mainly composed of W and Mo, while the latter has Au, Ag, Pt, Pd, and Cu.According to the metallization temperature, it can be divided into high-temperature method (1200-1600 oC), ultra-high-temperature method (above 1600 oC), and low-temperature method (900-1200 oC). The most commonly used method is the high-temperature method, among which the Mo-Mn method is more widely used.As shown below, the process of the Mo-Mn method is roughly: pretreatment of ceramic parts, preparation and coating of metallization layer formula, sintering of metallization layer, and electroplating on metallization layer.Advantages of Mo-Mn Method1. High bonding strength, high air tightness, high reliability, and good heat resistance.2. The finished product has dual characteristics of ceramic and metal.Product ParametersThe following are the material properties of alumina ceramic structural parts. CategoryPropertyUnit99.8%Al2O399.5%Al2O399%Al2O395%Al2O394.4%Al2O3MechanicalDensityg/cm3≥3.95≥3.90≥3.85≥3.65≥3.60Water absorption%00000Vickers hardnessHV17001700170015001500Flexural strengthMpa≥ 390≥ 379≥ 338≥ 320≥ 312Compressive strengthMpa≥ 2650≥ 2240≥ 2240≥ 2000≥ 2000Fracture toughnessMpam1/24-54-54-53-43-4ThermalMax. Service temperature(non-loading)oC17501675160015001500CTE (Coefficient of thermal expansion)20-800oC1×10-6/oC6.5-8.26.5-8.06.2-8.05.0-8.05.0-8.0Thermal shockT (oC)≥ 200≥ 200≥ 200≥ 220≥ 220Thermal conductivity25oCW/(m·k)3130292422.4Specific heat1×103J/(kg·k)0.780.780.780.780.78ElectricalVolume resistivity25oCohm·cm> 1×1014> 1×1014> 1×1014> 1×1014> 1×1014300oC1×10121×10128×10111012-10131012-1013500oC2×10125×10102×1091×1091×109Dielectric strengthKV/mm2019181818Dielectric constant (1Mhz)(E)9.89.79.59.59.5Why Choose UsOur ceramic parts with core competitiveness include ceramic tubes, ceramic rods, ceramic substrates, ceramic grinding burrs, ceramic seals, ceramic nozzles, textile ceramics, etc., which are widely used in furnaces, semiconductors, aerospace, pump valves, new energy, fluid control, mechanical wearing parts, and other fields. You are welcome to consult us for business.
Purchasing Request
Note: Send your purchase request, and we will screen suppliers or manufacturers for you free of charge...