↵
Products Description
Ceramic to Metal (CTM) components are key parts designed specifically for HVDC (High Voltage Direct Current) contactors in new energy applications. They are primarily used to achieve high insulation withstand voltage, safe arc extinction, and highly reliable hermetic connections. Through precision ceramic and metallization processes, this product ensures contact stability, sealing reliability, and long-term operational safety in high-voltage DC systems.
Material Properties
High-purity alumina ceramic substrate
Al₂O₃ content ≥95%, impurity content strictly controlled below 5%, possessing excellent insulation properties (breakdown voltage ≥20kV/mm), high temperature resistance (long-term operating temperature ≤800℃), and mechanical strength (flexural strength ≥350MPa), forming the core foundation for high insulation and hermeticity in ceramic metallization.
01
Metallization layer material
Using molybdenum-manganese slurry as the core metallization material, a dense metallization layer is formed through high-temperature sintering, achieving a bonding strength with the ceramic substrate ≥25MPa, and exhibiting good conductivity and brazing compatibility; a nickel-plated layer (3~5μm thick) further enhances brazing performance and oxidation resistance, ensuring a firm connection with metal components.
02
Matching Metal Materials
The contactor contacts are made of copper (conductivity ≥98%), and the armature and yoke are made of pure iron (permeability ≥1500μH/m, hysteresis loss ≤0.5W/kg), forming a complete material compatibility system to ensure synergistic performance of the Metallized Alumina Ceramics for Electrical Components.
03
Surface Performance Optimization
The metallized ceramic components surface roughness is strictly controlled below Ra 0.8μm, providing a smooth interface for subsequent vacuum brazing, effectively improving brazing sealing and connection strength, and mitigating leakage risks under high-voltage conditions.
04
Sintering and Metallization
Pre-sintering
Low-temperature sintering at 1300℃ to improve the mechanical strength of the green body for Metallized Ceramics.
Metallization printing
High-precision screen printing (325-400 mesh), positioning accuracy ±0.02mm for metallized ceramic components.
High-temperature co-firing
Sintering at 1450-1550℃ under a hydrogen protective atmosphere to achieve metallurgical bonding between the ceramic and the metallized layer.
Surface finishing
Grinding and polishing to Ra≤0.8μm to ensure the quality of subsequent brazing for Metallized Alumina Ceramics for Electrical Components.
Detailed Showcase
Ceramic Surface Treatment
Processed through precision grinding and polishing, the ceramic metallization surface is smooth and flawless, with roughness strictly controlled within standard ranges. This ensures brazing quality and provides a smooth interface for subsequent processes, enhancing sealing performance.
Metallization Layer Process
The metallized ceramic components metallization layer has neatly cut edges, free from defects such as overflow or peeling. The transition with the ceramic substrate is natural and smooth, effectively guaranteeing component connection strength and airtightness, mitigating structural risks under high-pressure conditions.
Interface Size Control
The Metallized Alumina Ceramics for Electrical Components interface dimensions are precise, with a rationally laid-out pre-brazing area, allowing for precise mating with contactor components. This significantly reduces assembly errors and improves assembly efficiency and compatibility.
contact us
We have long focused on the research and development and manufacturing of Ceramic To Metal products, and are equipped with an experienced engineering team. If you are currently selecting a product or evaluating a solution, please submit your project parameters for technical confirmation.
Hot Tags: ceramic to metal, China ceramic to metal manufacturers, suppliers, factory
