Product Description

High Purity Alumina (HPA) refers to aluminum oxide with a purity of ≥99.9% (3N, 4N, 5N). It is a premium inorganic material widely used in advanced ceramics, sapphire crystal growth, LED substrates, high-end abrasives, thermal interface materials, and electronic components.

Compared with conventional alumina, HPA offers:

•  Extremely low impurity levels (Fe, Na, Si in ppm or ppb)

•  Excellent sintering and high-temperature stability

•  Superior mechanical strength, hardness, and chemical resistance

•  Multiple forms including powders, granules, spheres, and polycrystals to suit various applications

Our HPA product line includes:

• RB-L-1 High Purity Alumina Powder

• RB-L-2 High Purity Alumina Granules

• RB-L-3 High Purity Spherical Alumina

• RB-L-4 High Purity Polycrystalline Alumina

These products are designed to meet the requirements of electronic ceramics, sapphire growth, thermal management materials, catalysts, and precision manufacturing industries.

   Details

RB-L-1 High Purity Alumina Powder

Description:

RB-L-1 is a high purity alumina fine powder characterized by uniform particle size distribution, excellent chemical stability, and ultra-low impurities. It is suitable for high-end ceramic and electronic applications.

Applications:

• Advanced ceramics & electronic ceramics

• LED glass, phosphor coatings

• High-temperature structural components

• Catalyst additives and carrier materials

RB-L-2 High Purity Alumina Granules

Description:

RB-L-2 is a dense, high purity alumina granular material with excellent thermal stability and flowability. It is ideal as a feedstock for sapphire crystal growth and high-performance ceramic melting.

Applications:

• Sapphire crystal growth feedstock

• Premium refractory materials

• Additive for electronic ceramic sintering

• Specialty powder metallurgy

RB-L-3 High Purity Spherical Alumina

Description:
RB-L-3 is produced through a controlled spheroidization process, resulting in spherical high purity alumina with excellent flowability, high packing density, and enhanced thermal conductivity.

Applications:

• Thermal interface materials (TIM)

• Electronic encapsulation & insulating fillers

• Wear-resistant composite materials

• High-precision ceramic components

RB-L-4 High Purity Polycrystalline Alumina

Description:
RB-L-4 is a high purity polycrystalline alumina material, featuring transparent or semi-transparent crystalline flakes with extremely low impurity content. It is widely used for sapphire growth and specialty ceramic applications.

Applications:

• Raw material for sapphire crystal growth

• LED optical substrates

• Transparent ceramics

• High-grade refractory and high-temperature applications

   Technical Parameters

   FAQS

Q: Does it support customized production?

A: Yes, particle size distribution, packaging and special indicators can be adjusted according to needs.

Q: How to pack and ship?

A: Moisture-proof woven bags or ton bags;Sea/air transportation, DDP, FOB,CIF and other trade terms are available.

Q: Can you provide samples?

A: Free samples of 1-2kg will be sent out within 3 working days.

Q: Do you guarantee safe and secure delivery of products?

A: Yes, we always use high quality export packaging. We also use specialized hazard packing for dangerous goods and validated cold storage shippers for temperature sensitive items. Specialist packaging and non-standard packing requirements may incur an additional charge.