Product Details

Product Description

China Sintered tabular alumina Manufacturer

Tabular Alumina is high-density, fully shrunk, coarse crystalline alpha-alumina that has been converted to the corundum form. It is a completely crystallized α-alumina sintered at slightly below the melting point of imported alumina after batching, grinding, and molding.

Tabular Alumina is produced by sintering ball-formed alumina at a temperature under the 2040°C fusion point of aluminum oxide. The crystals are arranged in a tabular staggered way, which increases the mechanical strength of the particles.

Tabular alumina has characteristic large, well developed hexagonal tablet-shaped α-alumina crystals of up to 200μm length.

Product Advantages

1. Complete crystallization, High purity up to 99.5% Al2O3

2. Low apparent porosity Less than 5%

3. Good resistance to alkalis and mineral acids

4. Low water absorption less than 1%

5. High hardness and toughness

6. High thermal conductivity

7. Excellent thermal shock resistance

8. Good abrasion resistance.

9. High volume stability

10.High anti-bending strength

Product Index

Typical physical properties
Specific gravity		3.96 g/cm3
Bulk density		3.45-3.5g/cm3
Apparent porosity		2-5%
water absorption rate		0.7-1.5%
Mohs' Hardness		9.0
Knoop hardness		2000kg/cm3
Thermal conductivity		(100℃)0.069 cal/sec cm℃
Heat capacity		(20℃)0.21cal/gm/(100℃)
Melting temperature		2050℃
Max. service temperature		min 1800℃
Refractive Index		1.76
Appearance		White granules or powder
Chemical composition(%)
Index	AL₂O₃	SiO₂	Fe₂O₃	Na₂O
Guarantee Value	min 99.2	max 0.18	max 0.1	max 0.4
Typical Value	99.45	0.05	0.02	0.32
Key Physical Index
Index	Bulk density(g/cm3)	Porosity(%)	Water absorption rate(%)
Guarantee Value	min 3.5	max 5.0	max 1.5
Typical Value	3.56	2.35	0.72

Particle Size Distribution:

Size:mm	Distribution	Typical Values %	MAX/MIN %
5-10mm	5-10mm	92	75
	7-10mm	58	40
	5-7mm	35	20
3-6mm	3-6mm	98	90
	4-6mm	55	40
	3-4mm	44	20
1-3mm	1-3mm	99	90
	2-3mm	52	30
	1-2mm	47	30
1-2mm	+2.36mm	8	10
1-2mm	-1mm	5	10
0.5-1mm	0.5-1.18mm	95	90
	0.7-1.18mm	45	35
	0.5-0.7mm	50	20
0.2-0.6mm	+0.6mm	5	10
0.2-0.6mm	-0.2mm	4	10
0-0.5mm	0-0.5mm	95	90
0-0.5mm	0.15-0.5mm	49	38
-200#	+0.088mm	0.3	3
-200#	-0.044mm	96	90
-325#	-0.044mm	97	85
Available Sizes
Fraction	0-30mm,30-10mm,12-6mm,10-8mm,8-5mm,5-3mm,3-1mm,2-1mm,1-0mm,1-0.5mm,0.5-0.2mm,0.5-0mm,0.3-0mm
Fine	46mesh-0,60mesh-0,80mesh-0,100mesh-0,120mesh-0,150mesh-0,180mesh-0,200mesh-0,240mesh-0,270mesh-0
Customized size is available upon request

Product Applications

Tabular Alumina is widely used in refractories including shaped & unshaped refractories, sliding gate, purging plug brick, nozzle, well block as well as kiln furniture, electronic industries, petrochemical industries, and ceramic industries. Tabular alumina is an ideal material for lining, ramming, aggregate, and castables in steel ladle. The usage of tabular alumina almost covers every step in steeling manufacturing.

Production process

Packaging & Shipping