High Purity Alumina Ceramic Block Industrial Grade 99 Al2O3 Ceramic Part

﹡Product Overview

Our 99% pure alumina (Al₂O₃) ceramic blocks are engineered for extreme industrial environments requiring superior wear resistance, thermal stability, and electrical insulation. Available in standard/custom sizes with precision machining capabilities.

﹡Key Technical Specifications

✅ Material Composition: 99% Alumina (Al₂O₃) – <0.1% impurities

✅ Density: 3.9 g/cm³ – Near-theoretical sintering

✅ Flexural Strength: 350-400 MPa

✅ Hardness: 1,500 HV (Mohs 9) – 2× harder than tool steel

✅ Max Operating Temperature: 1,600°C (2,912°F) continuous

✅ Thermal Conductivity: 28-35 W/(m·K)

✅ Dielectric Strength: 18-22 kV/mm

✅ Chemical Resistance: Impervious to acids/alkalis (except HF)

✅ Standard Sizes:

Thickness: 5-100mm (±0.05mm)

Width/Length: 50-500mm (custom up to 800mm)

﹡Industry Applications

1. Semiconductor Equipment

Plasma etch chamber liners – Non-contaminating, RF-transparent

Wafer processing pedestals – Ultra-flat surface (Ra <0.05µm)

2. High-Temperature Furnaces

Kiln furniture setter plates – Withstand 1,500°C cycling

Thermocouple protection blocks – Molten metal resistance

3. Chemical Processing

Reactor vessel liners – HCl/H₂SO₄ corrosion resistance

Pump housing inserts – Abrasion-resistant flow channels

4. Mechanical Engineering

Precision gauge blocks – Zero thermal expansion (±0.1µm)

Wire drawing dies – 10× lifespan vs. carbide

5. Energy Systems

SOFC stack components – Ionic insulation

Nuclear reactor insulators – Radiation-resistant

﹡Competitive Advantages

✔ 99% Purity – <50ppm metallic impurities for sensitive applications

✔ Superior Flatness – ±0.02mm/m precision grinding

✔ Custom Machining – Drilling, threading, CNC contouring

✔ Cost Efficiency – 50% longer service life than zirconia

﹡Why Choose Alumina Block?

30+ Years specialized in high-purity alumina

In-house CNC machining center (±0.01mm tolerance)

Technical Support: Free material selection consultation

Request Sample: Send your specifications for performance verification!

﹡Production process

1. Grind and crush the raw materials to be slurry or powder

2. se-different method to making the slurry or powder into semi-finished products

3. Put the semi-finished products into the kiln for dewaxing and sintering;

4. After forming and sintering, Ceramic Sleeves products can also be processed by subsequent CNC precision machining according to the drawing requirements. Then Q/C test.

5. Finally package Ceramic Sleeves by bubble paper or cartons and place it on tray for delivery

﹡Certifications

﹡Company

Yixing Shengda Refractory Ceramic Co, Ltd. was established in Yixing City, China in 1995, witha production area of over 10,000m2. lt is an enterprise specializing in the production of aluminaceramic,zirconia ceramic,slicon nitride, silicon carbide and other precision ceramic products. 

And we also produce ceramic band heaters, ceramic terminal block, cordierite and mullite ceramic parts an other ceramic products.

﹡Ceramic Properties