Product Name:
Alumina Ceramic Electrical Terminal Block
Product Material:
High-Performance Alumina Ceramic (Al₂O₃ 96%-99.5%)
Material Characteristics:
High dielectric strength (>15 kV/mm), Excellent volume and surface resistivity (>10¹² Ω·cm), High mechanical and flexural strength (>300 MPa), Good heat resistance (long-term service temperature >500°C), Superior arc resistance and comparative tracking index (CTI > 600 V), Chemical inertness (resistant to acids, alkalis, solvents, and salt spray), Low and compatible coefficient of thermal expansion (7-8×10⁻⁶/°C), Surface capable of high-adhesion metallization (copper plating, nickel plating, silver plating).
Application Fields:
Insulated connections within HV/LV switchgear and distribution boxes, Lead terminals for motor and transformer windings, Terminal blocks for industrial sensors and heating elements, Insulating support and electrical connection for power electronic modules (e.g., IGBT), High-temperature and arc-resistant connection points for special electrical appliances, Insulated interfaces for test and measurement equipment.
Application Industries:
Power transmission and distribution (Power Industry), New energy vehicles (electric control, battery packs), Semiconductor equipment, Rail transportation, Aerospace electrical systems, Petrochemical explosion-proof electrical equipment, New energy (photovoltaics, wind power), Advanced mechanical equipment (e.g., lasers, industrial furnaces).
Processing Difficulties:
Molding and sintering control for complex internal wire channels and external mounting features; Machining high-precision threaded holes or slots while maintaining their mechanical strength; Achieving high-reliability bonding between ceramic body and metal inserts or metallization layers, capable of withstanding thermal cycling and mechanical stress; Preventing cracking in thin-walled areas during processing and use; Ensuring consistency of insulation performance across production batches; Meeting stringent design requirements for electrical clearance and creepage distance.
Processing Flow:
Raw material formulation and mixing → Injection molding or dry pressing + CNC green machining → Sintering under controlled atmosphere → Rough machining of profile → Precision CNC machining (drilling guide holes, tapping threads, milling slots) → Grinding and polishing of critical surfaces → Ultrasonic cleaning → Initial inspection (dimensions, appearance) → Surface metallization treatment (screen printing, sintering, electroplating) → Final inspection (insulation resistance, withstand voltage test, pull-out force test) → Marking and dust-proof packaging
Delivery Period:
Standard models and structures: 30-45 days
Non-standard customization / complex multi-channel structures / special metallization requirements: 60-90 days
Ceramic Electrical Terminal Blocks are critical insulating structural components that ensure safe and reliable connections within electrical systems. Within a compact space, they must simultaneously achieve high standards of electrical insulation, secure mechanical locking, and effective thermal management. Compared to traditional plastic or bakelite terminals, terminal blocks manufactured from high-performance engineering ceramics are the ideal solution for high-reliability, long-life, and harsh-environment applications, offering unparalleled advantages in heat resistance, flame retardancy, arc resistance, and long-term stability.
Key Features:
Perfect Combination of High Insulation and High Strength – While providing extremely high electrical insulation performance, effectively preventing creepage and breakdown, the ceramic material itself possesses outstanding mechanical strength and hardness. This ensures the terminal block can withstand the mechanical stress of wire insertion/extraction, the torque of fastening screws, and long-term vibration, avoiding connection failures caused by cracking or deformation.
Reliable Connection and Thermal Balance – Through precise surface metallization processes, electrode areas with excellent conductivity and strong adhesion are formed on the ceramic insulator, ensuring low contact resistance and stable electrical connections. The inherent good thermal stability of the ceramic helps to dissipate Joule heat generated at the connection points in a timely manner, preventing local overheating.
Exceptional Adaptability to Harsh Environments – The material is inherently flame-retardant, non-aging, and exhibits strong resistance to most chemical reagents, oil contamination, and humid environments. It can operate stably for extended periods under high temperature, high humidity, corrosive atmospheres, or in applications requiring high cleanliness, significantly expanding the design boundaries and application fields of electrical equipment.
Core Technical Specifications
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