Insulation, Wear Resistance, Stability: Comprehensive Analysis Of High

Product Specification

Insulation, Wear Resistance, Stability: Comprehensive Analysis Of High-Performance Alumina Ceramics

Product Introduction
Alumina ceramic is an advanced industrial ceramic material with α-alumina (Al₂O₃) as the main crystal phase, renowned for its excellent insulation properties, outstanding wear resistance, and superior mechanical stability. Manufactured using high-purity raw materials and advanced sintering processes, it features a dense microstructure and uniform material distribution, making it an ideal material choice for high-end industrial applications.

Main Applications

• Power industry: High-voltage insulators, circuit breaker components, transmission line insulation accessories

• Mechanical equipment: Wear-resistant liners, mechanical seal rings, conveyor system guides

• Electronics industry: Circuit substrates, semiconductor packaging, vacuum connectors

• Mining and metallurgy: Slurry pump liners, screen components, crusher wear parts

• Chemical sector: Reactor linings, valve seals, corrosion-resistant pipelines

• Military and aerospace: Missile seeker domes, spacecraft thermal insulation components

Product Advantages

• Excellent insulation: Dielectric strength >18 kV/mm, volume resistivity >10¹⁴ Ω·cm

• Superior wear resistance: Hardness up to HRA 88-90, 266 times more wear-resistant than manganese steel

• Structural stability: Compressive strength >2500 MPa, flexural strength >300 MPa

• Corrosion resistance: Resists strong acids and alkalis, pH tolerance range 0-14

• High-temperature resistance: Long-term service temperature up to 1600°C

• Dimensional stability: Thermal expansion coefficient 6.5×10⁻⁶/°C, minimal dimensional changes

Specification Parameters Table

Process Flow

1. Raw material selection: 99.99% high-purity alumina powder

2. Formula design: Precise addition of sintering aids and modifiers

3. Ball milling and mixing: Thorough mixing using planetary ball mill

4. Spray granulation: Preparation of free-flowing granulated powder

5. Dry pressing: Bidirectional pressing molding process

6. Isostatic pressing: 200 MPa high-pressure densification treatment

7. High-temperature sintering: 1650-1800°C atmosphere-protected sintering

8. Precision machining: CNC grinding to micron-level accuracy

Usage Instructions

1. Use special tools during installation to avoid mechanical impact

2. Reserve appropriate thermal expansion gaps when connecting with metal parts

3. Regularly inspect surface condition in corrosive environments

4. Avoid rapid cooling and heating in high-temperature working conditions

5. Clean surfaces regularly to maintain insulation performance

6. Store in moisture-proof and impact-proof conditions, preferably in original packaging

After-Sales Service

• 18-month product quality warranty

• Lifetime free technical consultation

• 48-hour quick response to customer needs

• On-site installation guidance services

• Customer usage record establishment

• Regular follow-ups on usage conditions

FAQ

1. Q: Is the insulation performance of alumina ceramics affected by humidity?
   A: Almost unaffected; maintains excellent insulation even in 100% humidity environments.

2. Q: How is wear resistance quantified and compared?
   A: 266 times more wear-resistant than manganese steel and 5-8 times more than ordinary ceramics.

3. Q: Can complex shapes be machined?
   A: Various complex-shaped parts can be machined, with minimum aperture down to 0.2 mm.

4. Q: What is the maximum service temperature?
   A: Long-term use at 1600°C, short-term use up to 1800°C.