Alumina Ceramics: The Ultimate Solution For High-Performance Bearings, Seals And Insulating

Alumina Ceramics: The Ultimate Solution for High-Performance Bearings, Seals and Insulating

Introduction
Alumina ceramic (Al₂O₃) is a new type of inorganic non-metallic material with alpha-alumina as the main crystal phase. Known as the "King of Industrial Ceramics," it boasts extremely high hardness, exceptional wear resistance, excellent electrical insulation properties, and outstanding resistance to high temperatures and corrosion. Through stringent processes including powder preparation, forming, and high-temperature sintering, it can be manufactured into various high-precision components with complex shapes. It is widely used in cutting-edge industrial fields that demand extreme material performance.

Applications
The applications of alumina ceramic are extensive

• Precision Machinery: High-performance bearings, sealing rings, valves, guide rails, cutting tools.

• Electronics & Electrical: Integrated circuit substrates, insulating housings, vacuum interrupters, high-pressure sodium lamp tubes, RF windows.

• Chemical & Metallurgical Industries: Wear-resistant liners, crucibles, nozzles, grinding media.

• Medical Devices: Artificial joints, dental implants, surgical blades.

• New Energy: Lithium battery separator coatings, fuel cell components.

Advantages

1. High Hardness & Wear Resistance: Its hardness is second only to diamond and silicon carbide, significantly extending equipment service life.

2. Excellent Electrical Insulation: High resistivity and high dielectric strength ensure the safe and stable operation of electronic equipment.

3. High-Temperature Resistance: Can operate continuously in high-temperature environments up to 1600°C without melting or deforming.

4. Chemical Corrosion Resistance: Highly resistant to most acids, alkalis, and molten metals.

5. Low Density: Lightweight, contributing to the lightweight design of equipment.

Specification Parameter Table

Process Flow
The production of alumina ceramic follows a precise流程:Raw Material Batching → Ball Milling & Mixing → Spray Granulation → Dry Pressing/Cold Isostatic Pressing (CIP) → High-Temperature Sintering (1500-1800°C) → Precision Machining (Grinding, Polishing) → Non-Destructive Testing → Finished Product Packaging.

Usage Instructions

• Installation: Avoid impact with hard objects or localized stress concentration to prevent brittle fracture. Use nylon or rubber mallets for assembly.

• Mating: When mating with metal parts, pay attention to the difference in thermal expansion coefficients and allow for appropriate clearance.

• Cleaning: Ultrasonic cleaning can be used. Avoid strong corrosive chemicals like hydrofluoric acid.

• Storage: Store in a dry environment to prevent surface moisture absorption, which could affect performance.

After-Sales Service
We provide comprehensive technical support and after-sales service, including: product technical consultation, usage guidance, return and replacement service for non-human-caused quality issues (within 7 days of receipt), and long-term product quality tracking. We are committed to providing reliable solutions for our customers.

FAQ

• Q: What is the difference between alumina ceramic and zirconia ceramic?
  A: Alumina ceramic offers higher hardness, better wear resistance and insulation, and lower cost. Zirconia ceramic has far superior toughness (impact resistance) and fracture strength than alumina, but at a higher cost.

• Q: What is the highest precision achievable for machining alumina ceramic components?
  A: Through precision grinding and polishing, dimensional accuracy can be controlled within ±0.001mm, and surface roughness can reach Ra0.01μm.

• Q: How much sudden temperature change can it withstand?
  A: Its thermal shock resistance is generally moderate. Rapid temperature changes may cause cracking. Specific values need to be evaluated based on the material formula and component structure.