Hello,

Specification for alumina please see in the below.

ALUMINIUM OXIDE (ALUMINA)- Al2O3

CHEMICAL ANALYSIS
LOI(1100 0C) =% 1 max
Al2O3 =% 98,5 min
SiO2 =%0,030 max
FeO3 =%0,035 max
Na2O =%0,50 max

PHSYICAL SPECIFICATIONS
Bulk Density =1,00-1.10 gr/cm3
Absolute Density =3.30-3.60 gr/cm3
Bulk Angle =32-360
Alfa-Al2O3 =%15min

SIEVE ANALYSIS (TYLER)
+100 Mesh =% 3-10
-100 Mesh +200 Mesh =% 25-40
-200 Mesh +325 Mesh =% 30-50
-325 Mesh =% 15-30

Best Regards

Mr. Mehmet Bagci

Cengiz Holding
ETI-ALUMINUM INC Beijing Office
Tel:0086-10-58699941/42
Fax: 0086-10-58699940
Mobile: 0086-138 1188 2307
E-mail: mbagci@etialuminyum.com
Web: www.cengiz.com.tr
www.etialuminyum.com

Alumina: (also called aluminum oxide). A compound of two parts aluminum and three parts oxygen which occurs naturally as corundum. Alumina is the base of aluminous salts, a constituent of feldspars, micas, etc., and the characterizing ingredient of common clay, in which it exists as an impure silicate with water, resulting from the erosion of other aluminous minerals. In a hydrated form it is bauxite. Alumina is used in aluminum production and in abrasives, refractories, ceramics, and electrical insulation.

Quoted from: http://www.jewelrysupplier.com/glossary/A-glossary.htm