High-Strength And Heat-Resistant Alumina Ceramic: A Reliable Solution For

Product Specification

High-Strength And Heat-Resistant Alumina Ceramic: A Reliable Solution For Extreme Working Conditions

Introduction
High-strength, heat-resistant alumina ceramic is an advanced engineering ceramic material with alpha-alumina (α-Al₂O₃) as its primary crystal phase. Produced from high-purity raw material formulations and advanced sintering processes, it perfectly combines exceptional mechanical strength with outstanding high-temperature stability. It serves as an ideal replacement for metal materials in high-temperature, high-wear, highly corrosive, and high mechanical load environments, providing critical material support for the reliable operation of high-end industrial equipment.

Applications
This specialized alumina ceramic is widely used in fields with stringent requirements for mechanical strength and heat resistance:

• High-Temperature Industry: Rollers for high-temperature kilns, thermocouple protection tubes, crucibles, refractory supports, nozzles for molten metal flow control.

• Machinery and Automation: High-performance ceramic bearings, mechanical seal rings, wear-resistant lining plates, cutting tools, textile ceramic components.

• Defense and Aerospace: Missile radomes, radar antenna windows, high-temperature insulation components.

• Energy and Chemical Industry: Valves and valve cores, pump seals, chemical packing rings for corrosive media environments.

Advantages

1. Extremely High Mechanical Strength: High flexural and compressive strength, capable of withstanding heavy loads and severe mechanical impact, with a long service life.

2. Exceptional Heat Resistance: Melting point as high as 2050°C, can operate normally in high-temperature environments up to 1600°C for extended periods, with excellent thermal shock resistance.

3. Outstanding Wear Resistance: High hardness, wear resistance far exceeds that of wear-resistant alloy steel, making it the preferred wear-resistant material in harsh working conditions.

4. Good Chemical Stability: Resistant to acid and alkali corrosion, does not react with most molten metals, and has good oxidation resistance.

5. Excellent Insulation Properties: Maintains good electrical insulation even at high temperatures, suitable for high-temperature electrical applications.

Specifications Table

Manufacturing Process
High-purity alumina powder → Precise formulation → Ball milling and mixing → Spray granulation → Dry pressing/Cold isostatic pressing → High-temperature sintering (>1600°C) → Precision CNC grinding → Non-destructive testing → Full-dimensional inspection → Packaging and shipment.

Usage Instructions

1. Installation and Handling: Although highly strong, it is still a brittle material. Avoid localized stress concentration during installation and never strike directly with a metal hammer. Use soft tools is recommended.

2. Thermal Shock Management: Despite good heat resistance, avoid severe rapid cooling and heating to maximize service life.

3. Mating Materials: It is recommended to pair with softer materials (such as carbon graphite, copper, 45# steel) or with itself to prevent premature wear of the mating parts.

After-Sales Service
We provide a 12-month product quality guarantee and have a professional technical support team. Lifetime technical consultation is available, with responses to customer inquiries within 48 hours. On-site technical support can be provided based on needs.

FAQ
Q1: How does the strength and heat resistance of alumina ceramic compare to metals?
A: Its compressive strength is much higher than that of ordinary steel, and its hardness is second only to diamond. Its heat resistance far exceeds that of most metals; it does not oxidize or deform at high temperatures, making it the best choice to replace metals in high-temperature environments.

Q2: Can it withstand drastic temperature changes?
A: Yes, it has good thermal shock resistance. However, the specific tolerable thermal shock temperature difference (ΔT) needs to be evaluated based on part size and structure. Exceeding its design limits during use should be avoided.

Q3: Can parts be welded or repaired after damage?
A: No. Ceramics cannot be welded using traditional methods. For small parts, special ceramic adhesive can be used for bonding; for critical components, direct replacement is recommended.