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Alumina Oxide Ceramics (Al₂O₃,Aluminum Oxide)
Alumina ceramic is a highly durable and versatile material known for its extreme hardness, resistance to corrosion, and high thermal conductivity.
Good heat resistance
Resistance to corrosion
High strength and hardness
92 series, 95 series, 97 series, 99 series, 995 series
Introduction
Features
Photo Gallery
Product Knowledge
Technology Parameters
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What are Alumina Oxide Ceramics?

Alumina oxide  ceramic is a high-strength, high-corrosion-resistant, and high-wear-resistant ceramic material with alumina (Al2O3) as the main body. It is generally shaped by dry pressing or vacuum casting, sintered at high temperature, and can be machined into dimensions according to customer requirements.

 

Typical Application:Alumina oxide  ceramics are widely used in industries such as electronic, semiconductor, chemical, iron & steel, metallurgical, petroleum, coal mining, machinery equipment, textile industry, etc.

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what are Alumina Oxide Ceramics
Properties of Alumina Oxide Ceramics
Properties of Alumina Oxide Ceramics
  • High Hardness
    Alumina oxide ceramics are extremely hard, providing excellent durability for industrial applications.
  • High Thermal Conductivity
    Offer superior heat management, making them ideal for high-temperature environments
  • Corrosion Resistance
    Alumina oxide ceramics resist wear, chemicals, and erosion, ensuring long-term stability.
  • Versatile Forming Methods
    Alumina oxide ceramics can be shaped through various techniques like injection molding and die pressing, allowing for customized components.
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How are Alumina Oxide Ceramics Produced1
How are Alumina Oxide Ceramics Produced?

Alumina oxide ceramics are currently categorized into two types: high-purity and regular.

High-purity alumina oxide ceramics are composed of more than 99.9% Al₂O₃. With a sintering temperature of 1650–1990°C and a transmission wavelength of 1–6μm, this type is often used to produce fused glass, serving as a substitute for platinum crucibles. Due to its transparency and resistance to alkali metal corrosion, it is also employed in the production of sodium lamp tubes. In the electronics industry, it is used as a substrate for integrated circuits and as high-frequency insulation material.

How are Alumina Oxide Ceramics Produced2

Regular alumina oxide ceramics are classified based on the Al₂O₃ content into grades such as 99%, 95%, 90%, and 85%. In some cases, materials with 80% or 75% Al₂O₃ are also included in the regular alumina ceramic series.

– 99% alumina oxide ceramics are used for manufacturing high-temperature crucibles, refractory furnace tubes, and specialized wear-resistant materials such as ceramic bearings, ceramic seals, and water valve discs.
– 95% alumina oxide ceramics are primarily utilized for corrosion-resistant and wear-resistant components.
– In 85% alumina oxide ceramics, the addition of talc enhances electrical properties and mechanical strength, allowing for sealing with metals such as molybdenum, niobium, and tantalum. Some of these ceramics are used in electric vacuum devices.

 

Click to view the specific process of alumina oxide ceramic production

Technology Parameters of Alumina Oxide Ceramics
Alumina Oxide Ceramics
Item unit 92 series 95 series 97 series 99 series
Al2O3 % 92 95 97 99
Bulk density g/cm3 3.60 3.65 3.72 3.85
Bending Strength MPa 255 292 300 350
Compressive Strength MPa 2800 3300 3400 3600
Elastic Modulus GPa 290 340 350 380
Impact Resistance MPam1/2 3.3 3.9 4.0 5.0
Mohs’ hardness HV0.5 9 9 9 9
Heat-resisting Temperature °C 1500 1600 1600 1700
Moisture Content % 0 0 0 0
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