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High-Purity Calcined Alumina Powder HA-1 & HA-2 with α-Al₂O₃ ≥ 94%, High Density ≥ 3.94 g/cm³, and D50 4–5μm
High-Purity Calcined Alumina Powder HA-1 & HA-2 with α-Al₂O₃ ≥ 94%, High Density ≥ 3.94 g/cm³, and D50 4–5μm
High-Purity Calcined Alumina Powder HA-1 & HA-2 with α-Al₂O₃ ≥ 94%, High Density ≥ 3.94 g/cm³, and D50 4–5μm
High-Purity Calcined Alumina Powder HA-1 & HA-2 with α-Al₂O₃ ≥ 94%, High Density ≥ 3.94 g/cm³, and D50 4–5μm
High-Purity Calcined Alumina Powder HA-1 & HA-2 with α-Al₂O₃ ≥ 94%, High Density ≥ 3.94 g/cm³, and D50 4–5μm
High-Purity Calcined Alumina Powder HA-1 & HA-2 with α-Al₂O₃ ≥ 94%, High Density ≥ 3.94 g/cm³, and D50 4–5μm
Specifications
Delivery Time :
Normally 15 days
Density (g/cm³) :
≥ 3.90
Brand Name :
HUAO
Al₂O₃ (%) :
≥ 99.3
Color :
White
Model Number :
Calcined Alumina
SiO₂ (%) :
≤ 0.02
MOQ :
Negotiation
LOI (%) :
≤ 0.1
325 Mesh Residue :
≤ 1%
Price :
Negotiation
α-Al₂O₃ (%) :
≥ 93
Packaging Details :
25kg/ 50kg/ 1000kg/ 1250kg/Jumbo(BB); Or As Customer's Requirement
Particle Size D50 (μm) :
4–5
Certification :
ISO9001, ISO14001, ISO45001
Na₂O (%) :
≤ 0.40
Place of Origin :
Shandong, China
Fe₂O₃ (%) :
≤ 0.02
Description

High-Purity Calcined Alumina Powder HA-1 & HA-2 for Ceramics and Refractories

Product Overview

HUAO Calcined Alumina is manufactured from low-sodium calcined alumina raw material through precision grinding and deep processing techniques. Produced in our manufacturing facility, HA-1 and HA-2 deliver high α-phase conversion, high physical density, and minimal trace chemical impurities. Featuring a high melting point, high thermal conductivity, and outstanding electrical resistivity, HUAO Calcined Alumina serves as a vital functional material for global B2B clients in advanced technical ceramics, refractory linings, electronics, and precision polishing compounds.

Technical Specifications

Item Al₂O₃ (%) SiO₂ (%) Na₂O (%) Fe₂O₃ (%) LOI (%) α-Al₂O₃ (%) Density (g/cm³) Particle Size D50 (μm) 325 Mesh Residue
HA-1 ≥ 99.3 ≤ 0.02 ≤ 0.40 ≤ 0.02 ≤ 0.1 ≥ 93 ≥ 3.90 4-5 ≤ 1%
HA-2 ≥ 99.6 ≤ 0.01 ≤ 0.15 ≤ 0.02 ≤ 0.1 ≥ 94 ≥ 3.94 4-5 ≤ 1%

Particle size can be customized according to customers' specific requirements.

Key Features

  • High α-Phase Conversion: Delivers an α-Al₂O₃ content of ≥ 93% (HA-1) and ≥ 94% (HA-2), ensuring consistent crystal stability, low firing shrinkage, and high mechanical hardness.
  • Low Sodium & High Purity: Low Na₂O concentrations (≤ 0.15% for HA-2) and strict silica/iron oxide limits optimize electrical insulation and high-temperature thermal durability.
  • High Density & High Melting Point: Features a true density of up to ≥ 3.94 g/cm³ alongside a high melting point, promoting rapid densification during ceramic sintering.
  • Superior Electrical & Thermal Performance: High resistivity and high thermal conductivity make it an ideal ceramic substrate material for demanding electrical equipment.
  • Controllable Grain Sizing: Standardized D50 particle size (4-5 μm) with ≤ 1% 325 mesh residue provides predictable dispersion and rheology in slurry mixing.
High-Purity Calcined Alumina Powder HA-1 & HA-2 with α-Al₂O₃ ≥ 94%, High Density ≥ 3.94 g/cm³, and D50 4–5μm High-Purity Calcined Alumina Powder HA-1 & HA-2 with α-Al₂O₃ ≥ 94%, High Density ≥ 3.94 g/cm³, and D50 4–5μm

Applications

Technical & Structural Ceramics

Extensively used in manufacturing architectural ceramics, structural ceramics, and wear-resistant components requiring high mechanical strength and erosion resistance.

Electronic Equipment & Substrates

Applied in high-insulation electronic parts and substrates due to its low soda content, high electrical resistivity, and efficient thermal dissipation.

High-Performance Refractory Materials

Acts as a fine reactive filler in high-alumina bricks, unshaped monolithics, and refractory matrix formulations needing thermal volume stability.

Precision Polishing & Wear-Resistant Compounds

Used as a high-hardness abrasive medium in polishing compounds, metal finishing slurries, and specialized wear coatings.

Quality Assurance

Certified Quality Assurance: Produced under strict ISO 9001, ISO 14001, and ISO 45001 management systems, HUAO tests every production lot for chemical purity, crystal conversion, and grain size distribution.

Deep Processing Capabilities: Our fine milling and deep processing lines allow precise control over particle morphology and sizing, ensuring seamless batch integration into customer production lines.

Direct Factory Exporter: As an integrated manufacturing and trading supplier, HUAO guarantees reliable bulk volume delivery, direct cost savings, and secure international export packaging.

High-Purity Calcined Alumina Powder HA-1 & HA-2 with α-Al₂O₃ ≥ 94%, High Density ≥ 3.94 g/cm³, and D50 4–5μm High-Purity Calcined Alumina Powder HA-1 & HA-2 with α-Al₂O₃ ≥ 94%, High Density ≥ 3.94 g/cm³, and D50 4–5μm

Customization Options

HUAO provides tailored particle size adjustments to align with your exact pressing, casting, or polishing requirements. Packaging options include moisture-proof 25kg multi-layer bags and 1000kg/1200kg jumbo bulk bags with inner polyethylene liners, fully palletized and shrink-wrapped for maritime transport.

FAQ

What is the main difference between Calcined Alumina HA-1 and HA-2?

HA-2 offers higher chemical purity (Al₂O₃ ≥ 99.6%), lower soda content (Na₂O ≤ 0.15%), higher alpha-phase content (α-Al₂O₃ ≥ 94%), and higher density (≥ 3.94 g/cm³) compared to HA-1, making it ideal for high-spec electronic ceramics and high-purity applications.

Can HUAO supply customized particle size distributions for Calcined Alumina?

Yes, while our standard D50 median size is 4-5 μm, particle sizes can be prepared and fine-milled according to specific customer requirements.

Why is low sodium content important in calcined alumina powder?

Low Na₂O content improves electrical resistivity and dielectrics in electronic components while raising high-temperature refractoriness and sintering performance.

We also provide other alumina products. If you would like to learn more about Reactive Alumina, please click here.

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High-Purity Calcined Alumina Powder HA-1 & HA-2 with α-Al₂O₃ ≥ 94%, High Density ≥ 3.94 g/cm³, and D50 4–5μm

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Product Detail
Delivery Time :
Normally 15 days
Density (g/cm³) :
≥ 3.90
Brand Name :
HUAO
Al₂O₃ (%) :
≥ 99.3
Color :
White
Model Number :
Calcined Alumina
Contact Supplier
High-Purity Calcined Alumina Powder HA-1 & HA-2 with α-Al₂O₃ ≥ 94%, High Density ≥ 3.94 g/cm³, and D50 4–5μm
High-Purity Calcined Alumina Powder HA-1 & HA-2 with α-Al₂O₃ ≥ 94%, High Density ≥ 3.94 g/cm³, and D50 4–5μm
High-Purity Calcined Alumina Powder HA-1 & HA-2 with α-Al₂O₃ ≥ 94%, High Density ≥ 3.94 g/cm³, and D50 4–5μm

Zibo Huao New Materials Co., Ltd.

Verified Supplier
3 Years
shandong, zibo
Since 2016
Business Type :
Manufacturer, Exporter
Main Products :
Alumina Ceramic Tiles, Alumina Ceramic Plates, Alumina Ceramic Brick
Employee Number :
6~400
Certification Level :
Verified Supplier
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