Name: Calcined Alumina Oxide Powder
SKU: 0



Get a Quote!

PRODUCTS



Location: HOME > PRODUCTS > Alumina Oxide Powder > Calcined Alumina Oxide Powder

Product classification

Calcined Alumina Oxide Powder

Alumina Oxide Powder

The product presents as a white powder, featuring a uniform particle size, remarkable ease of dispersion, stable chemical properties, moderate high - temperature shrinkage, and outstanding sintering characteristics. These properties endow it with wide - ranging applications in various industrial fields.

Message

Product Description

Calcined Alumina Oxide Powder (α-Al2O3)

Product Overview

Calcined Alumina Oxide Powder (α-Al₂O₃) is produced by calcining premium aluminum hydroxide at ultra-high temperatures. This process converts the material into a stable, highly crystalline Alpha phase recognized for its extreme hardness, high refractoriness, and chemical inertness.

Our Calcined Alumina is engineered with precise particle size distribution (D10/D50/D90) and customizable soda (Na₂O) content. It serves as a vital raw material for advanced structural ceramics, high-alumina refractories, precision grinding slurries, and electrical insulation components.

Core Highlights

Alpha Phase Conversion: ≥ 95.0%
High Chemical Purity: Al₂O₃ ≥ 99.5%
Primary Crystal Size: 0.5 μm - 4.5 μm
Low Soda Options (Na₂O ≤ 0.05%) Available
Exceptional Sintering & Mechanical Density

Technical Specifications

Chemical Formula	α-Al₂O₃
Chemical Purity (Al₂O₃)	≥ 99.5% (High Purity Grade ≥ 99.8%)
Alpha Phase Content	≥ 95.0%
Primary Crystal Size	0.5 μm - 4.5 μm (Tailored by calcination degree)
Median Particle Size (D50)	1.5 μm - 45 μm (Micro-ground & Unground available)
BET Specific Surface Area	0.5 - 3.0 m²/g
Sodium Oxide (Na₂O)	≤ 0.15% (Low-Soda Grade ≤ 0.05%)
Iron Oxide (Fe₂O₃)	≤ 0.02%
Silicon Dioxide (SiO₂)	≤ 0.03%
Moisture / Water Absorption	≤ 0.2%

Key Performance Features

Extreme Hardness & Wear Resistance

Mohs hardness 9.0 delivers unmatched abrasion resistance in heavy industrial ceramics and abrasives.

High Refractoriness

Melting point exceeds 2050°C, maintaining superior structural integrity under extreme thermal shock.

High Electrical Insulation

Low Na₂O options offer outstanding dielectric strength and high volume resistivity for electronic parts.

Controlled Grain Size & Packing

Engineered primary and aggregate particle size distributions yield ultra-high sintering density.

Primary Applications

Refractories & Castables

Essential for high-alumina bricks, unshaped castables, ladle linings, and ramming mixes requiring thermal durability.

Advanced Technical Ceramics

Used in wear-resistant ceramic tiles, valve seats, spark plug insulators, and semiconductor ceramic substrates.

Precision Polishing & Abrasives

High-efficiency abrasive grain for lapping, metal finishing, optical glass polishing, and semiconductor CMP slurries.

Glazes, Enamels & Electrical Parts

Enhances surface hardness, gloss, and thermal resistance in ceramic glazes and high-voltage porcelain insulators.

Packaging & Storage

Standard Packaging

25 kg moisture-proof PP bags with inner PE liners, or 1000 kg Jumbo ton bags with palletization options.

Storage Conditions

Store in a clean, dry, well-ventilated warehouse. Keep sealed to prevent moisture pick-up and contamination.

Need customized particle size (D50) or low-soda grades? Contact our technical engineering team today to request detailed TDS/MSDS documents, free testing samples, or competitive commercial quotes tailored to your industrial application.

Get a Free Quote