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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

Name: High-Purity Calcined Alumina Powder HA-1 & HA-2 with α-Al₂O₃ ≥ 94%, High Density ≥ 3.94 g/cm³, and D50 4–5μm
Brand: Zibo Huao New Materials Co., Ltd.
SKU: Calcined Alumina
Price: Negotiable USD
Availability: InStock

Product Details

Place of Origin: Shandong, China

Brand Name: HUAO

Certification: ISO9001, ISO14001, ISO45001

Model Number: Calcined Alumina

Document: HUAO Calcined Alumina.pdf

Payment & Shipping Terms

Minimum Order Quantity: Negotiation

Price: Negotiation

Packaging Details: 25kg/ 50kg/ 1000kg/ 1250kg/Jumbo(BB); Or As Customer's Requirement

Delivery Time: Normally 15 days

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Product Details

Product Description

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                                                                                                                                                                                                                                                                                                                                                                                High-Purity Calcined Alumina Powder, Calcined Alumina Powder with α-Al₂O₃, High Density Calcined Alumina Powder
                              

Al₂O₃ (%):	≥ 99.3	SiO₂ (%):	≤ 0.02
Na₂O (%):	≤ 0.40	Fe₂O₃ (%):	≤ 0.02
LOI (%):	≤ 0.1	α-Al₂O₃ (%):	≥ 93
Density (g/cm³):	≥ 3.90	Particle Size D50 (μm):	4–5
325 Mesh Residue:	≤ 1%	Color:	White

Al₂O₃ (%):	≥ 99.3
SiO₂ (%):	≤ 0.02
Na₂O (%):	≤ 0.40
Fe₂O₃ (%):	≤ 0.02
LOI (%):	≤ 0.1
α-Al₂O₃ (%):	≥ 93
Density (g/cm³):	≥ 3.90
Particle Size D50 (μm):	4–5
325 Mesh Residue:	≤ 1%
Color:	White

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 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.

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.

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