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China refractory manufacturer factory supply 99% alumina oxide TMA Tabular alumina used in refractory material and castable
Tabular alumina is a kind of pure sintered corundum that does not add any additives such as MgO, B2O3 and so on, also called TMA.
Tabular alumina has a coarse and well-developed α-Al2O3 crystal structure. The content of Al2O3 is more than 99.3%. Crystal-like structure with small pores and many closed pores. The porosity is roughly the same as that of fused corundum.
Tabular alumina has high purity, good volume stability, and minimal re-fire shrinkage. The refractory or castable used for the production of refractory materials or castables has good properties after high temperature treatment Thermal shock stability and flexural strength.
China refractory manufacturer factory supply 99% alumina oxide TMA Tabular alumina used in refractory material and castable
The main properties of tabular alumina:
1. Refractoriness ≥1800℃, and its melting point is as high as 2050℃.
2. It has a coarse and well-developed a-Al2O3 crystal structure, which greatly improves the creep resistance.
3. Plate-like crystal structure, small open pores, low porosity, low water absorption; more closed pores inside, good thermal shock resistance and peeling resistance performance. To
4. Since no additives are added in the production process, the purity is high, the volume stability is good, and the reheating shrinkage is very small.
Technical indicators of sintered tabular alumina:
| Tabular Corundum | Items | Standard Value | Typical Value |
| Chemical Composition (%) | Al2O3 Min | 99.2 | 99.5 |
| SiO2 Max | 0.2 | 0.1 | |
| Fe2O3 Max | 0.1 | 0.08 | |
| Na2O Max | 0.4 | 0.36 | |
| Physical Performance | Bulk Density (g/cm3) Min | 3.5 | 3.55 |
| Apparent Porosity (%) Max | 5 | 3.6 | |
| Water Absorption (%) Max | 1.5 | 1 |
General size of tabular alumina:
Gain: 5-8mm 3-5mm 1-3mm 0.5-1mm
Fine powder: 325#
Tabular alumina usage:
Tabular alumina can be used as the main component in aluminum-carbon, aluminum-magnesium-carbon, magnesia-aluminum-carbon, magnesia spinel, and aluminum-chromium refractory bricks, or it can be introduced into high-alumina refractory bricks as a component of enriched alumina. Shaped refractories can be widely used in steel, casting, ceramics and other industries, and the application in the steel industry almost covers the entire process of ironmaking and steelmaking.
The well-known tabular alumina is used to make abrasives. Due to the superhard properties of emery ceramics, it can be prepared into various grinding wheels, emery cloths, sandpapers and various abrasives, which are widely used in the machining industry.
Tabular alumina material also has self-lubricity and low friction coefficient, which is about half of that of cemented carbide. Its thermal shock resistance and high elastic modulus are used in some special places, such as high-power The performance of the laser mirror is better than that of copper, due to its low density, good rigidity and small deformation. As a new type of material, it has been applied to battery anode materials, new ceramics, solar energy industry, seals, automobiles and other industries.
China refractory manufacturer factory supply 99% alumina oxide TMA Tabular alumina used in refractory material and castable
Packaging for Tabular alumina
1. 25kgs pvc bag
2. 25kgs pvc bag+1MT big bag
3.25kgs pvc bag +Pallet
4.1MT big bag
Packaging can be customized according to customer requirement
Shipping for Tabular alumina
1.Our packaging is as per customer’s request
2.Normal goods delivered by sea transport
3.Sample shipping by express
4.We will shipping and delivery goods timely, quality and quantity guaranteed, and also in accordance with the contract and customer's requirement completely.
Delivery:
15-30 days working day for large quantity. The shipment we will arrange as soon as possible. Of course, if it is a custom products, the shipping time will delay.
Sample:
Usually by EMS, DHL, UPS, TNT, FedEx. Anyway you like. Bulk order: Usually by sea.
Payment:
It can be through T/T, L/C at sight. The specific terms determined according to the quantity of the goods, etc.
Your inquiry related to our product & price will be replied within 24 hours.
Jerry Li
Cell&WhatsApp: 0086-13373957739
Email: jerry(at)ht-refractory.com