Product Description
Sintered tabular alumina powder 325F 325mesh refractory castable
Sintered tabular alumina is a kind of fully shrunk, coarse crystalline alpha alumina that have been converted to the corundum form. It is a completely recrystallized a-al2o3 sintered at slightly below the melting point of imported alumina after batching, grinding and molding.
Calcined tabular alpha alumina is produced by sintering ball-formed calcined 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.
Characteristic
1. High purity up to 99.5% Al2O3
2. Good resistance to alkalies and mineral acids
3. Low water absorption less than 1%
4. High hardness and toughness
5. High thermal conductivity
6. Excellent thermal shock resistance
7. Good abrasion resistance.
8. High volume stability
9. High anti-bending strengt
3. Low water absorption less than 1%
4. High hardness and toughness
5. High thermal conductivity
6. Excellent thermal shock resistance
7. Good abrasion resistance.
8. High volume stability
9. High anti-bending strengt
Specification
Typical physical properties | ||||
Specific gravity | 3.96 g/cm3 | |||
Volume denstiy | 3.45-3.5g/cm3 | |||
Apparent porosity | 4-6% | |||
water absorption | 1-1.5% | |||
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 | |||
Apperance | White crystalline granules or powder | |||
Chemical composition（%） | ||||
Size | AL2O3 | SiO2 | Fe2O3 | Na2O |
0-1mm 1-3mm 3-5mm 5-8mm | min 99.2 | max 0.1 | max 0.02 | max 0.4 |
200#-0 320#-0 | min 99.1 | max 0.15 | max 0.04 | max 0.4 |
Customized size is available upon request | ||||
Processing
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Packing & Delivery
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FAQ
Q: Are you trading company or manufacturer ?
A: We are factory.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to
quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipment.
Q:Which region is your main market？
A:We have many customers from South Korea, Japan, Russia, North America. Most of those clients cooperated with us more than 10 years. refractory castable cement refractory castable cement refractory castable cement refractory castable cement refractory castable cement refractory castable cement refractory castable cement refractory castable cement
A: We are factory.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to
quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipment.
Q:Which region is your main market？
A:We have many customers from South Korea, Japan, Russia, North America. Most of those clients cooperated with us more than 10 years. refractory castable cement refractory castable cement refractory castable cement refractory castable cement refractory castable cement refractory castable cement refractory castable cement refractory castable cement
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