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Silicon Nitride High-Voltage Insulator

Guizhou Jiuhong Technology Co., Ltd.

Negotiable MOQ: 10 Boxes (Price negotiable depending on order volume and customization)

Key Specifications

Color:

Other

Usage:

High Voltage Power Transmission

Brand:

Other

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Color Other

Usage High Voltage Power Transmission

Brand Other

Connection Method Spherical Type

Size of Bearing Capacity 550KN

Application Fields

•
Gas-Insulated Switchgear (GIS) and Circuit Breakers: Used to isolate high-voltage conductors from grounded metal enclosures, withstanding operational forces and short-circuit current impacts
1、High-Voltage/Ultra-High-Voltage Direct Current Transmission (HVDC/UHVDC): Serve as insulating support components in converter valve towers, where low dielectric loss reduces energy dissipation

2、New Energy Vehicles: Act as DC-Link busbar support sleeves in motor controllers, enduring voltages above 800V, high temperatures, and vibrations

3、Aerospace and Marine Power Systems: Compact medium-voltage insulation components meeting high power density and reliability requirements

Key Performance Advantages

High Mechanical Strength and Toughness: Flexural strength reaches 700–1000 MPa, surpassing alumina ceramics (300–400 MPa), enabling lightweight and compact designs

Excellent Thermal Properties: Thermal conductivity of 20–30 W/m·K and low thermal expansion coefficient (~3.2×10⁻⁶/K), closely matching metals, ensuring thermal shock resistance and efficient heat dissipation

Outstanding Electrical Insulation: Dielectric strength >15–20 kV/mm, volume resistivity >10¹⁴ Ω·cm, and low dielectric loss (tanδ <0.002), ideal for high-voltage and high-frequency environments
Chemical Stability: Resistant to acids, alkalis, salt spray, and industrial pollutants, ensuring decades-long service life in harsh conditions

Comparison with Traditional Materials

Property	Silicon Nitride (Si₃N₄)	Alumina (Al₂O₃)	Epoxy Resin/Composites
Flexural Strength (MPa)	700–1000	300–400	100–200
Thermal Conductivity (W/m·K)	20–30	20–30	0.2–0.5
Thermal Expansion (10⁻⁶/K)	~3.2	~7–8	20–60
Max Operating Temperature (°C)	>1200 (inert atmosphere)	~1500	~150 (long-term)

Challenges and Trends

•
Cost: High raw material and sintering expenses limit widespread adoption
1、Innovation: Ongoing research focuses on microstructure optimization (e.g., grain orientation control) and composite development (e.g., Si₃N₄-SiC) to enhance performance
2、This translation highlights the technical specifications and industrial relevance of silicon nitride high-voltage insulators, suitable for technical documentation or product specifications.

Product Tags: Silicon , High-voltage , porcelain