Description:
Zirconia fused alumina is produced by putting rich aluminum, zirconium materials and additives in electric 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.
Characteristic:
l Higher roughness than alumina without Zirconium.
l 40%ZrO2 Zirconia has better self-sharpening ability， abrasive tools like cutting disc and grinding wheel would be sharper and more durable.
l 25%ZrO2 Zirconia is more Suitable for making heavy duty grinding disc which works good for heat-resistant alloy steel, titanium alloy and austenitic stainless steel.
Application：
- Making zircon fused alumina brick and building materials.
- Used for making bonded abrasives products,and process of grinding,sandblasting,surface treatment of metal products and other materials.
- With good melt erosion resistance,Zirconia fused alumina has good grinding effect on steel,iron casting,heat resistant steel and other alloy materials.
- Fused zirconia can be made for heavy duty grinding wheel,snagging,cutting disc,Fiber disc,grinding rails,high speed abrasive belts etc.
- Used for making coated abrasives products.
- Used for making lapping paste,polishing wax,emery cloth,sandpaper etc.
| Chemical composition | |||
| Item | ZA25 | ZA40 | |
| AL2O3 | 68-72% | 55-57% | |
| ZrO2 | 24-30% | 35-44% | |
| TiO2 | Max 1.5% | Max 1.5% | |
| Fe2O3 | Max 0.5% | Max 0.5% | |
| SiO2 | Max 1.0% | Max 1.0% | |
| Typical physical properties | |||
| Particle shape | monoclinical tetragonal | ||
| Chemical property | Amphoteric | ||
| Reaction with acid and alkali | No | ||
| Reaction with carbon | Forming carbide since 1650 ℃ | ||
| Crystal Size | ≤30 μm | ||
| Hardness | Mohs:9.0 | ||
| Knoop hardness | 1450-2000 kg/cm3 | ||
| Melting Point | 1850 ℃ | ||
| Maximum service temperature | 1600 ℃ | ||
| Specific Gravity | 4.20g/cm3 | ||
| Bulk density(LPD) | 2.18 g/cm3 | ||
| Color | Gray | ||
| Specific heat capacity(cal/g.C) | 0.2205(50-500℃) | ||
| Heat conductivity | 0.2718 cal/cm2.sec.℃ | ||
| Linear expansivity(X10-6) | 6.82(100-700℃) | ||
| Grains grit | 4# 5# 6# 8# 10# 12# 14# 16# 20# 22# 24# 30# 36# 40# 46# 54# 60# 70# 80# 90# 100# 120# 150# 180# 220# | ||
