Reactive Grade Alumina

Catalog No.	AC3499
Material	Al2O3
Purity	99.8%
Size	Customized

Catalog No.

AC3499

Material

Al2O3

Purity

99.8%

Size

Customized

Reactive Grade Alumina Description

Reactive grade alumina powders are processed for use as a reactive binder in various applications. With a crystal size of less than 2 microns, the Martinswerk reactive grade alumina powders have an Al2O3 content of at least 99.8%. Reactive grades are more stable than calcined alumina, thus suitable for dense, high strength wear resistant materials.

Features:

-High Hardness

-High Compression Strength

-Abrasion/ Wear-Resistance

-Abrasives

-Chemical Inertness

-High Degree of Refractoriness

-Superior Electrical Insulating Properties

-Dielectric Properties

-High Melting Point

Reactive Grade Alumina Specifications

	MR23	MR32	MR42	MR52	MR70
Al2O3 (%)	≈99.8	≈99.8	≈99.8	≈99.8	≈99.8
Na2O (%) total	≤0.1	≤0.1	≤0.1	≤0.1	≤0.1
CaO (%)	≈0.02	≈0.03	≈0.02	≈0.04	≈0.02
Fe2O3(%)	≈0.02	≈0.03	≈0.02	≈0.03	≈0.02
SiO2 (%)	≈0.025	≈0.05	≈0.05	≈0.01	≈0.08
MgO	-	-	-	≈0.08	≈0.06
αAl2O3 (%)	≥95	-	-	≥95	-
Loss on Ignition (%)	≤0.2	-	-	≤0.23	-
Specific Surface Area (m2/g)	0.2-0.5	3.5-5	2-3	6-9	6-10
Primary Crystal Size (µm)	≈3	-	-	≈1.5	-
Bulk Denisty (kg/m3)	≈600	≈1000	≈600	≈1100	≈900
Green Density (50 MPa) g/cm3	≈2.16-2.30	≈2.45	2.1-2.3	-	2.15-2.38
Fired Denisty (1600oC, 2h) g/cm3	-	≈3.4	3.0-3.3	-	3.74-3.95
Water Adsorption (ml/100g)	-	-	≈18	≈13	≈20