Zirconia fused alumina is produced by putting rich aluminum, zirconium materials and additives in electic furances, smelting with high temperature above 2000°C,cooling down with special technology, and compacting with Barmac plastic, which has the characteristics of tenacious texture, dense structure and high strength.
Items |
Al2O3 |
ZrO2 |
TiO2 |
Fe2O3 |
SiO2 |
ZA25 |
68-72 |
24-30 |
≤1.5 |
≤0.5 |
≤1.0 |
ZA40 |
55-57 |
35-44 |
≤1.5 |
≤0.5 |
≤1.0 |
Crystal Form |
Monoclinic,tetragonal system |
Reaction with acid and alkali |
no |
Reaction with carbon |
Forming carbide since 1650C |
Color |
Grey |
True Density |
4.20g/cm3 |
Bulk Density |
2.18g/cm3 |
Moh's hardness |
9.0 |
Knoop hardness |
1450-2000kg/cm2 |
Melting point |
1900C |
Maximum service temperature |
1700C |
Specific heat capacity(cal/g.C) |
0.2205(50-500C) |
Heat conductivity |
0.2718 cal/cm2.sec.C |
Linear expansivity(X10-6) |
6.82(100-700C) |
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Black Silicon carbide is produced at high temperature in an electric resistance type furnace with quarts sand and petroleum coke.
Garnet sand is a kind of mineral with good hardness and widely used for abrasives, refractory material, sandblasting and waterjet cutting,etc.
Pink Fused Alumina is produced by adding chromium oxide to high purity aluminum oxide during the fusion process.
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