Pure Additive-Free Tabular Alumina with Well-Developed Crystal Structure Sintered Tabular Alumina
Product Description
HUAO Tabular Alumina is a premium pure sintered corundum manufactured completely without additives such as magnesium oxide. Fully sintered to achieve complete thermal shrinkage, the material features a dense, well-developed alpha-Al₂O₃ crystal structure. With an Al₂O₃ content exceeding 99.2%, it is produced through precision fine grinding, roll forming, and ultra-high-temperature thermal firing of aluminum oxide powder. Supplied as durable white granular aggregates and fine powders, it serves as an indispensable raw material for high-performance refractory linings and critical industrial ceramics.
Technical Parameters
| Chemical Composition & Physical Parameters | Content |
|---|---|
| Al₂O₃ | ≥ 99.2 % |
| SiO₂ | ≤ 0.09 % |
| Na₂O | ≤ 0.4 % |
| Fe₂O₃ | ≤ 0.02 % |
| Bulk Density | ≥ 3.5 g/cm³ |
| Apparent Porosity | ≤ 5.0 % |
| Moisture Content | ≤ 1.5 % |
Grain size can be prepared according to customer requirements.
Key Features
- Sintered completely without fluxing agents like MgO, eliminating low-melting glass phases to preserve maximum structural integrity under extreme heat.
- Features large, interlocking alpha-Al₂O₃ tabular crystals that provide outstanding resistance to thermal shock and mechanical spalling.
- Achieves a bulk density of ≥ 3.50 g/cm³ with an apparent porosity of ≤ 5.0%, effectively blocking molten metal and slag penetration.
- Maintained low silica (SiO₂ ≤ 0.09%) and iron oxide (Fe₂O₃ ≤ 0.02%) levels prevent high-temperature chemical corrosion and matrix softening.
- Exhibits regular particle shapes with fewer flaky grains, which significantly optimizes castable matrix packing and workability.
Advantages
- Exceptional Refractoriness & Slag Resistance: Delivers superior corrosion and erosion resistance in highly aggressive environments, outperforming standard sintered aluminas.
- Outstanding Volume Stability: Exhibits minimal dimensional change after high-temperature firing, preventing structural cracking or lining deformation in cyclic furnaces.
- Reduced Water Demand in Castables: Low water absorption properties substantially lower mixing water requirements, boosting matrix density and cold crushing strength in unshaped refractories.
- Extended Service Life: Drastically reduces refractory wear rates in severe industrial applications, lowering total operational maintenance costs and downtime.
Applications
Tabular Alumina is widely used in the main structural components of alumina magnesia carbon (AMC), magnesia carbon, magnesia spinel, and aluminum chromium bricks, as well as high alumina monolithic castables in the steel, casting, and petrochemical industries. In addition, it plays an indispensable role in the manufacturing of high-performance steelmaking functional refractory materials, including blow plug cores, sliding door panels, shields, and heavy-duty working linings for medium frequency induction furnaces.
Customization & Packaging
Export packaging configurations include reinforced 25 kg double woven bags or 1000 kg / 1250 kg / 1350kg jumbo bags with moisture barrier. All packages are fixed to fumigated or non-fumigated wood and wrapped with stretch wrap to prevent damage during long distance ocean transportation. We also support Neutral Packaging and OEM printing custom brandmarks and shipping marks. Products and packaging are customized according to customer requirements.
FAQ
A1: Yes, HUAO operates in strict compliance with ISO 9001, ISO 14001, and ISO 45001 certified management systems, enforcing rigorous physical and chemical testing on every production lot.
A2: Omitting additives prevents the formation of low-melting eutectic phases, ensuring the material retains maximum refractoriness and hot mechanical strength under severe thermal stress.
A3: HUAO Tabular Alumina features a bulk density of ≥ 3.50 g/cm³ and an apparent porosity of ≤ 5.0%, ensuring a dense barrier against slag penetration.
A4: Its low water absorption reduces mixing water requirements, while its regular particle shape improves fluidity, resulting in denser, higher-strength castable matrices.
A5: Yes, HUAO provides flexible crushing, screening, and sizing capabilities to supply tailored particle size distributions matching your exact refractory formulation.
We also provide other alumina products. If you would like to learn more about White Fused Alumina, please click here.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.