99.8% High Alumina Ceramic for Electrical Insulation | High-Voltage Switchgear & GIS Components

Product Description

99.8% Al2O3 metallized ceramics for high-voltage insulation (126kV-1000kV). Ultra-white, low sodium content, optimized for SF6 circuit breakers & GIS. Custom formulations available.

99.8% High-Purity Alumina Ceramics for High-Voltage Electrical Insulation

Engineered for critical high-voltage applications, our 99.8% Al2O3 alumina ceramics provide superior electrical insulation and mechanical stability in demanding environments from 126kV to 1000kV systems. These ultra-white, low-sodium ceramics are specifically formulated for SF6 circuit breakers, GIS insulation, and epoxy resin casting systems.

Key Electrical Insulation Properties

• Ultra-High Purity: 99.8% Al2O3 content with controlled impurity levels (Na₂O ≤ 0.20%)

• Superior Dielectric Performance: Low conductivity (40-100 μS/cm) ensures reliable insulation

• Optimized Processing: Controlled viscosity (3000 cp) and pot life for seamless epoxy resin integration

• Precision Engineering: Tight particle size distribution (D50: 3-22μm) for consistent performance

Technical Specifications - Electrical Grade Alumina

Critical High-Voltage Applications

• SF6 Circuit Breakers: 126kV-550kV insulation components

• Gas Insulated Switchgear (GIS): Primary insulation for 126kV-1000kV systems

• High-Voltage Cable Accessories: Insulation and filling for cable joints

• Transformer Components: Mutual inductor GIS insulation

• Electrical Bushings & Insulators

Material Advantages for Electrical Systems

Enhanced Reliability

• Consistent dielectric properties across temperature variations

• Excellent compatibility with epoxy resin casting systems

• Minimal ionic contamination for long-term stability

Manufacturing Efficiency

• Predictable rheology for automated production processes

• Multiple grades tailored to specific potting system requirements

• Custom formulations available for specialized applications

Custom Electrical Solutions

We provide tailored alumina formulations to match your specific:

• Epoxy resin system compatibility requirements

• Voltage class specifications (126kV to 1000kV)

• Processing parameters and production workflows

Request Electrical-Grade Alumina Samples

Our technical team can help select the optimal ALF series grade for your high-voltage insulation application.

Contact us for technical datasheets and sample evaluation to verify performance in your specific electrical system.

Founded in 2017, Kegu is a leading advanced materials developer based in China’s Xixian New District, Qinhan New City—strategically positioned near major transport links including the Xianyang East Expressway. With a registered capital of 35.5 million RMB (approx. 5 million USD), we operate from a modern 5-acre production facility where we combine materials science innovation with precision manufacturing.

We specialize in engineering high-performance ceramic components for mission-critical industries such as New Energy, Chemical Processing, Pharmaceuticals, and Aerospace. Our products are known for exceptional thermal stability, excellent chemical resistance, and outstanding mechanical properties.

Leveraging a strong R&D foundation, we deliver customized ceramic solutions that meet stringent international quality standards while enhancing operational performance and reducing lifecycle costs for OEMs and innovators worldwide. At Kegu, we’re solving tomorrow’s material challenges—today.