Factory Price tabular alumina Refractory Raw Material

Tabular Alumina Introduction

Tabular alumina is a purely sintered -corundum material that is a compact body rapidly sintered at temperatures above 1900 C without sintering aids. Tabular alumina has approximately 200 m and well-developed hexagonal plate-like -corundum crystals. Its excellent thermal volume stability and thermal shock resistance can be attributed to the following special microstructure of platy corundum: less open pores, large crystals, closed spherical pores due to recrystallization trap during rapid sintering.

 

 

Features

1. Low open porasity and large crystals with closed spherical pores

2. Extremely high refractoriness, high mechanical strength and abrasion resistance

3. Good chemical purity, excellent dielectric properties and good resistance against acid and alkali corrosion.

 

Tabular Alumina Chemical and Physical Index

Items	Chemical composition				Physical property			Note
	AL2O3	Na2O	SiO2	Fe2O3	Bulk density	Apparent porosity	Water absorption
	%	%	%	%	g/cm3	%	%
Ball	99.3	0.40	0.12	0.04	3.55	3.0	1.0
Particle size	99.3	0.40	0.13	0.05	3.55	3.0	1.0	(mm):5-10,3-6(5),3-1,1-0,0.5-1,0.2-0.6
Powder	99.1	0.40	0.15	0.07	3.50	5.0	1.5	(m):-45m(-325mesh)-30m(-500mesh)
Package	25kg/bag; 1ton/bag; or as customers' requirement