High Temperature Metallized Ceramic Relay Case
Products Description
This product utilizes a one-piece molded alumina ceramic substrate, achieving a metallurgical-grade bond between the ceramic and metal interfaces through a molybdenum-manganese high-temperature metallization process. This is a typical structural design for High Temperature Metallized Ceramic Relay Cases. Its internally reserved electrode mounting positions and sealing grooves directly support the contacts, springs, and arc-extinguishing components of the high-voltage relay. During high-voltage DC switching, it simultaneously achieves the three core functions of electrical insulation, arc isolation, and heat dissipation, ensuring the electrical stability of the high-voltage circuit under extreme operating conditions.
Product Features and Functions
High Voltage Insulation
95% Alumina Based Ceramics Case with a volume resistivity ≥1×10¹⁴Ω・cm, providing stable insulation under DC 1500V-10000V high voltage conditions, blocking the risk of cross-current and breakdown in high voltage circuits.
High Temperature Resistance
The EV Alumina Ceramic Housing, combined with the metallized plating, provides high-temperature stability, withstanding the instantaneous high-temperature impact generated by relay contact arcing without structural deformation or performance degradation.
Arc Erosion Protection
Alumina Metallized Ceramics possess excellent anti-arc erosion properties, isolating the arc generated during contact switching, preventing the arc from directly eroding the housing structure, and extending the overall service life of the relay.
Mechanical structure support characteristics
The one-piece molded high-strength ceramic matrix has a bending strength of ≥320MPa, which can withstand the installation load of the internal components of the relay and the high-frequency vibration under vehicle conditions, maintaining the long-term stability of assembly accuracy.
Manufacturing Process
Ceramic Greenbody Forming
The cavity contour and internal structure of Precision Metalized Ceramics are integrally formed using high-precision molds, with dimensional tolerances controlled within ±0.02mm.
01
High-Temperature Dense Sintering
The greenbody is sintered in a vacuum clean furnace to form high-density, low-defect Metallized Alumina Ceramics for Electrical Components, with a density ≥3.9g/cm³.
02
Metallization Sintering
The ceramic substrate coated with metallization slurry enters a reducing atmosphere furnace to complete the metallization coating and metallurgical bonding between the metallization coating and the Metallized Ceramics for Electrical.
03
Post-Processing and Inspection
The metallized edges and electrode holes are precision ground, followed by airtightness testing, insulation withstand voltage testing, and coating adhesion testing to ensure the finished product meets performance standards.
04
Detailed Display
Full-Circumference Metallized Edge Sealing: Alumina Metallized Ceramics for Electronic Applications features integrated metallized edges with a uniform and continuous plating layer, free of breaks or omissions. This allows for direct laser welding to the metal casing, achieving an airtight seal.
Metallized Electrode Hole Inner Walls: The inner walls of the electrode holes in the HVDC Contactor High Purity Ceramics Shell for Relay are fully covered with a uniform metallized plating layer, ensuring stable conductivity of the copper electrodes after brazing and eliminating excessive contact resistance.
Internal Cavity Positioning Bosses: The EV HVDC Relay Ceramic Housing features pre-drilled positioning bosses and clearance grooves within the cavity, precisely securing the internal contact components and spring structure of the relay and preventing poor contact caused by component movement.
Precision Processing Holes: The bottom of the Alumina Relay Ceramic Envelope for Electric Automobile housing features pre-drilled micro-processing holes for automated assembly positioning and airtightness testing, adapting to the needs of large-scale production line operations.
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Our High Temperature Metallized Ceramic Relay Case, with its superior performance and reliability, is the ideal choice for high-voltage DC contactors in the new energy sector. Please contact us for more information and customized services.
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