High-Strength Metallized Ceramic Components
In the high-voltage DC electrical architecture of new energy vehicles, energy storage systems, and photovoltaic power plants, the safe disconnection and stable load bearing of circuits are directly related to the operational reliability of the entire system. As a core protection and control component in this field, the high-voltage DC contactor's internal key insulating encapsulation component—the High-Strength Metallized Ceramic Components—bears the triple functions of electrical isolation, mechanical support, and airtightness maintenance.
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Product Introduction
This High-Strength Metallized Ceramic Components adopts high-purity alumina or silicon nitride as the substrate and forms a robust metallization layer on its surface, enabling permanent hermetic bonding between ceramics and metals. Widely applied in high-voltage main circuits of new energy vehicles, energy storage battery management systems and photovoltaic inverters, it serves as the structural foundation for high-voltage DC contactors to create vacuum or inert gas arc-extinguishing environments.
Production technology
Raw Material Pretreatment and Ceramic Forming
Alumina/silicon nitride ceramic powder is crushed, sieved, and dried (particle size deviation ≤3%). Metallization layer materials such as molybdenum-manganese alloy are smelted and adjusted. Dry pressing or injection molding is used, with precise parameter control to ensure green body quality. Degreasing is performed after molding to prevent sintering cracking.
Ceramic Sintering and Metallization
Ceramic green bodies are sintered at 1600℃-1800℃ (temperature fluctuation ≤5℃), and defects are removed through flaw detection. A metallization layer is coated using Mo-Mn or AMB processes and co-fired at high temperature to ensure adhesion strength. DBC technology can be used to improve conductivity for some products.
Precision Machining and Welding Encapsulation
The ceramic body is precision machined (tolerance ±0.02mm) using CNC and laser cutting. Metal parts are cold-forged/stamped. Laser welding and vacuum welding are used for brazing connections. Airtightness testing (leakage rate ≤1×10⁻⁹Pa·m³/s) is performed to prevent leakage.
Surface treatment and finished product inspection
Electroplating of the metallization layer is performed according to requirements, and the ceramic surface is cleaned; full-item testing is conducted on each batch, and unqualified products are rejected to ensure that the performance meets the standards.
Technical parameters
| Insulation resistance | >1000MΩ (typical); high-performance products >10000MΩ |
| Rated withstand voltage | 1000V - 3000V (withstands 1.5 times rated voltage surge) |
| Bending strength | 200MPa - 500MPa |
| Metallization adhesion | >20N/mm² (tensile test); AMB process >150MPa |
| Coefficient of thermal expansion | (6-8)×10⁻⁶/K (matched with metal parts) |
(Note: Specific parameters can be designed and customized according to customer product requirements)
Application areas
New Energy Vehicle Sector
Adapted to high-voltage DC electrical systems in new energy vehicles, such as BMS and motor controller connections, and high-voltage contactors in charging systems. It can withstand vibrations and high/low temperature cycles during vehicle operation, ensuring metallized ceramic components reliable switching of high-voltage circuits, facilitating safe vehicle operation and efficient charging, while also providing cost-reduction and efficiency-enhancing solutions.
Energy Storage System Sector
High-voltage DC contactors used in large-scale energy storage power stations and distributed energy storage equipment. They can stably withstand high voltage and high current, enabling Metallized Ceramics reliable connection and disconnection between energy storage battery packs and the grid/load, ensuring safe and stable charging and discharging of the energy storage system, and meeting the long-term operational needs of energy storage systems.
Photovoltaic Power Station Sector
High-voltage DC contactors used in photovoltaic inverters, combiner boxes, and other equipment. They can operate reliably for extended periods in complex outdoor environments such as high temperatures, ultraviolet radiation, and dust storms, ensuring stable circuit control between the photovoltaic array and the grid, and improving the efficiency and reliability of the photovoltaic power generation system for ceramic metallization.
competitive advantage
The company has deep expertise in the field of High-Strength Metallized Ceramic Components, possessing numerous industry-recognized patented technologies. These patents are aligned with actual product applications and engineering needs, creating a differentiated competitive advantage. The patents cover core aspects such as metallization processes, material formulations, precision machining, and hermetic encapsulation, enhancing product insulation, mechanical strength, and adhesion stability, while strengthening reliability and manufacturing consistency. Leveraging a technical team with 30 years of industry experience, combined with the group's large-scale production capacity, controllable processes, and full-industry chain advantages, the company transforms its patents into large-scale production capabilities. This ensures product quality while reducing costs and increasing efficiency. Furthermore, through localized services, the company translates its patent advantages into customer value, mitigating procurement selection and supply risks.
Contact Us
If you need information about the technical specifications, customization options, sample requests, and bulk purchases of High-Strength Metallized Ceramic Components during your engineering procurement and technology selection process, please feel free to contact us. We will provide professional technical support and efficient services to help your engineering projects proceed smoothly.
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