Description

Alumina powder (aluminum oxide, Al₂O₃) is a high-purity ceramic material known for its exceptional hardness, wear resistance, and thermal stability. Available in purities from 99.9% to 99.99%, our alpha-phase alumina powder is suitable for demanding applications including precision polishing, thermal spraying, and advanced ceramic manufacturing.

Unlike many other ceramic materials, alumina combines high thermal conductivity with excellent electrical insulation, making it a versatile choice for both industrial and technical applications.

Key Properties

• High Hardness – With a Mohs hardness of 9, alumina is one of the hardest materials available, providing excellent wear resistance in abrasive applications.
• Thermal Stability – Maintains structural integrity at temperatures up to 1750°C, making it suitable for furnace components and high-temperature processes.
• Electrical Insulation – Volume resistivity exceeding 10¹⁴ Ω·cm ensures reliable performance in electronic and insulating applications.
• Chemical Resistance – Resists attack by most acids, alkalis, and corrosive environments at room and elevated temperatures.
• Wear Resistance – Low friction coefficient and high compressive strength make it ideal for wear-resistant components.

Specification

Product Variants

Custom particle sizes and purity grades available upon request.

Applications

• Precision Polishing & Lapping – Optical components, semiconductors, metal and ceramic surface finishing
• Thermal Spraying – Wear-resistant coatings, corrosion protection, thermal barrier coatings
• Advanced Ceramics Manufacturing – Feedstock for crucibles, tubes, thermocouple sheaths, wear parts
• Refractory Materials – High-temperature furnace linings, insulation, investment casting shells
• Research & Development – Ceramic composites, catalyst supports, electronic substrates

Particle Size Selection Guide

Custom particle size distributions available to meet specific requirements.

Packaging

Custom packaging available upon request. All products are handled in clean conditions to prevent contamination.

Frequently Asked Questions

Q: What is the difference between alpha and gamma alumina?
A: Alpha alumina (α-Al₂O₃) is the most stable and common form, with high hardness and density. Gamma alumina (γ-Al₂O₃) is a transition phase with higher surface area, often used as a catalyst support. Our OX1489 series is alpha-phase unless otherwise specified.

Q: What purity levels are available?
A: We offer 99.9% (3N) and 99.99% (4N) as standard. Higher purities and custom specifications are available upon request.

Q: What particle sizes do you offer?
A: We offer a range from sub-micron to coarse mesh sizes. See the Product Variants table for standard options.

Q: Is alumina powder safe to handle?
A: Yes, alumina is generally considered safe. Standard industrial hygiene practices (dust mask, gloves) are recommended when handling large quantities.

Q: Can you provide samples for testing?
A: Yes, sample quantities are available for evaluation. Please contact us with your application requirements.

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