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Product Description
【Properties】Sintered alumina , also referred to as tabular alumina , is made of imported industrial alumina as starting material by fast sintering in super-high temperature shaft kiln.Its micro structure is featured by closely packed well developed granular corundum crystals with a wide size range and many intra- and intercrystalline pores. The product is characterized by high purity , low alkali level,high strength , good thermal shock resistance and corrosion resistance.
【Application】Used as aggregates and powder in alumina-based and alumina-contained refractories ,it has been widely used in metallurgical industry (such as ladle lining refractories , sliding plate , purging plug, well-block ,stopper , long nozzle and submerged entry nozzle for con-casting, etc.) and other industries like ceramics petrochemical, glass, etc.
【Chemical index】
Item | Specification | Typical values | |
Chemical compositon (%) | Al2O3 | ≥99.20 | 99.46 |
Na2O | ≤0.40 | 0.30 | |
SiO2 | ≤0.15 | 0.09 | |
Fe2O3 | ≤0.07 | 0.05 | |
Magntic Fe,% | ≤0.02 | 0.01 | |
Bulk density,g/cm3 | ≥3.50 | 3.55 | |
Apparent porosity,% | ≤5.00 | 3.75 | |
Water absorption,% | ≤1.50 | 0.90 | |
Note : We can also Customized according to clients’ requirements.
1) Screening standard:GB/T6003.1-2012 idt ISO3310-1:2000
2) Product size:We can offer various sizes from 15 mm to under 2μm.
3) Product package:25kg/bag,1000kg/bag or other specific packaging according to clients’ requirement.