Calcined Alumina

Al₂O₃ ≥ 99.8% α-Phase ≥ 95% High Purity Low Soda

A high-purity calcined alumina with high chemical inertness and a high melting point — widely used across refractories, alumina bricks and castables, high alumina cement, and non-ferrous metallurgy.

Al₂O₃≥ 99.7 – 99.8%
α-Phase≥ 95% conversion
True S.G.≥ 3.95 g/cm³
AppearanceWhite powder, free from lumps
Packing25 kg bags / 1.25 MT jumbo bags

Request a Quote Technical Data

Calcined Alumina high purity white powder

Product Description

Calcined Alumina is characterized by high chemical inertness and a high melting point. It is widely used in refractory applications such as electro-fused zirconia corundum, alumina bricks, alumina hollow spheres, various castables and ramming mixes for the steel industry, alumina refractory fibers, high alumina cements, and non-ferrous metallurgy.

Main Applications

Technical Parameters

Item	ZX1A	ZX2	ZX3	ZX4	ZX5	ZX6
Al₂O₃ (%)	≥99.7	≥99.7	≥99.7	≥99.7	≥99.8	≥99.8
SiO₂ (%)	≤0.03	≤0.03	≤0.05	≤0.03	≤0.03	≤0.03
Fe₂O₃ (%)	≤0.02	≤0.02	≤0.02	≤0.01	≤0.01	≤0.01
Na₂O (%)	≤0.06	≤0.04	≤0.04	≤0.03	≤0.03	≤0.03
Alpha-phase Conversion (%)	≥95	≥95	≥95	≥95	≥96	≥96
True Specific Gravity (g/cm³)	≥3.95	≥3.95	≥3.95	≥3.95	≥3.96	≥3.96
Primary Crystal Size (µm)	1.2–1.5	1.7–1.9	2.0–2.3	2.5–2.7	2.8–3.0	3.1–3.3
BET Surface Area (m²/g)	<2.0	<0.8	<0.7	<0.6	<0.5	<0.45
Appearance	White powder, free from lumps
Particle Size	Customizable upon request

Packaging & Storage

Woven Bag

25 kg

Jumbo Bag

1.25 MT

Palletized

25 kg × 40 bags / pallet

Keep in a dry, ventilated area, away from moisture and contamination.
Custom packing available on request.

Calcined Alumina

Product Description

Main Applications

Technical Parameters

Packaging & Storage

Need Calcined Alumina? Request pricing, specs, and lead time.

Tell us your grade, particle size, and quantity