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Our this alpha-phase alumina is a white powder with ≥99.99% purity and 150nm grain size. It has a specific surface area of 10–20m²/g and pH 6–8, featuring high hardness, thermal stability and corrosion resistance. Widely used in ceramic materials, grinding media and refractory products.
Cas No. :
1344-28-1Molecular Formula :
AI2O3Density :
3.987 g/cm³Melting point :
2054℃Place of Origin :
ChinaApperance :
White PowderPurity :
99.99%Basic information
High-purity alumina (such as 4N grade) has a theoretical density of approximately 3.987 g/cm³. The actual sintered body density often exceeds 3.8 g/cm³. Its Mohs hardness is 9, its melting point is 2054℃, and it possesses both high insulation and corrosion resistance properties.
Specification
1: Used as insulating layers and packaging materials in semiconductors, leveraging its high purity (4N+) and excellent dielectric properties to ensure device stability and performance.
2: Applied in precision optical coatings (e.g., lenses, mirrors) due to its high transparency, hardness, and resistance to environmental corrosion, meeting the strict requirements of optical systems.
3: Serves as a carrier or sensitive layer in gas, humidity, and pressure sensors, relying on its controlled porosity, chemical inertness, and thermal stability for accurate sensing.
4: Essential in manufacturing high-performance electronic ceramics (e.g., substrates, insulators) for its high mechanical strength, electrical insulation, and compatibility with sintering processes.
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Certificates
The products have been approved by FDA,REACH,ROSH,ISO and other certification, in line with national standards.
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y
FAQ
Q: Are you trading company or manufacturer?
A: We are factory.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. Or it is 15-20 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
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