Low Na2O Tabular Alumina
Description
Technical Parameters
Products Description
Tabular alumina is a pure sintered alpha alumina material that is fully densified by rapid sintering at temperatures above 1900 ° C without any sintering aids. The outstanding feature of low Na2O tabular alumina lies in its strict control over Na2O content. Excessive Na2O will soften the crystal structure at high temperatures, reduce the refractoriness, and accelerate the corrosion of slag and alkaline steam.
HUAO's tabular alumina is generated at a temperature close to its melting point to complete crystal transformation, resulting in α - Al₂O₃ particles with a size ranging from 50 μ m to 400 μ m. The closed cell structure and ultra-high density bring excellent volume stability and creep resistance. It does not contain additives such as MgO, retains pure material characteristics, and meets the demand for high-performance refractory materials in the industry.
Advantages
1. Low sodium content, stable high-temperature performance
The Na ₂ O content is strictly controlled below 0.40%, effectively avoiding high-temperature softening and performance degradation caused by alkali impurities. Even in ultra-high temperature environments above 1800 ° C, it can maintain a stable crystal structure and mechanical strength.
2. Good plate-like crystals and closed cell structure
The unique sheet-like crystal morphology and uniform closed pores hinder the penetration of slag, corrosive gases, and liquid media. This structure greatly improves the corrosion resistance and service life of refractory products.
3. Thermal shock resistance
Internal closed holes absorb thermal stress and prevent crack propagation. It remains stable under rapid heating and cooling cycles, is not prone to cracking or peeling, and adapts to harsh working conditions with drastic temperature changes.
4. Strong chemical inertness
It is inert to most acids, bases, molten metals, and industrial chemicals. It does not react with raw materials or media, ensuring the purity and stability of the product during high-temperature processing.
5. Granularity compatibility
We can provide particles (5-8mm, 3-5mm, 1-3mm, 0-1mm) and 325 mesh fine powder, and can also customize particle size to adapt to different refractory materials and ceramic formulations to meet diverse production needs.
Low Na2O tabular alumina compared with molten alumina and traditional calcined alumina, it has lower porosity, higher thermal conductivity, and better high-temperature strength. It solves common pain points such as cracking and excessive shrinkage during long-term high-temperature use, making it the preferred choice for the steel, cement, petrochemical, and incineration industries.
Application
Refractory material products
Aggregates used as refractory materials for ladle lining, refining furnaces, cement rotary kilns, and garbage incinerators. It improves the high temperature resistance, corrosion resistance, and service life of the furnace lining.
Steel and metallurgical industry
Applied to iron ditch castables, sliding door panels, and high-temperature furnace components. It resists the erosion of molten steel and slag corrosion, ensuring stable production.
Ceramics and kiln furniture
Suitable for high alumina structural ceramics, kiln frames, and high-temperature kiln components. It maintains dimensional stability and surface flatness during high-temperature firing process.
Electrical and electronic field
Used for high insulation ceramic components and electrical insulators. Its low impurities and high insulation performance meet the safety requirements of electrical products.
Catalysts and industrial filtration
As a catalyst carrier and metal filter material, its stable structure and high purity provide reliable support for catalytic reactions and media filtration.
Composition Type
|
CompositionType |
Al2O3% |
SiO2% |
Na2O% |
Fe2O3% |
Bulk density (g\cm3) |
Porosity% |
Moisture% |
|
MA-35 |
≥99.2 |
≤0.20 |
≤0.40 |
≤0.10 |
≥3.50 |
≤5.0 |
≤1.50 |
|
Typical value |
99.5 |
0.1 |
0.36 |
0.08 |
3.55 |
3.6 |
1 |
Basic Information
|
Model No |
ZBHA |
|
Bulk density |
3.5kg/cm³ |
|
Moisure |
1.5% |
|
Specification |
5-8/10mm, 3-5/6mm ,1-3mm, 0-1mm ,325mesh |
|
Origin |
China |
|
Production capacity |
15000 tons |
|
Color |
White/Brown |
|
Porosity |
5% |
|
Transport Package |
Jumbo bag |
|
Trade Mark |
HUAO |
|
HS code |
281810900 |
Why choose Huao's Low Na2O tabular alumina?
1. Strict low Na ₂ O control, truly high-purity
We focus on controlling the content of Na ₂ O and harmful impurities from raw materials to finished products. Each batch has been tested to ensure stable low sodium performance.
2. No additives, pure performance
Without any sintering additives, it maintains the natural high temperature stability of α - Al₂O₃. All parameters are real measurement data without false markings.
3. The sintering process is stable and the batch quality is consistent
Adopting professional high-temperature rapid sintering technology and precise temperature control ensure the full development of crystals. The performance differences between batches are minimal, ensuring the stability of production.
4. Full particle size supply and customization
We provide complete particle size specifications and support customized screening and processing. We can develop granularity according to customer requirements.
5. Large production capacity and stable supply
Our annual output is 15000 tons, ensuring long-term stable supply to large industrial customers and avoiding production interruptions caused by raw material shortages.
6. Professional packaging and safe transportation
Standard container bag packaging (25kg, 1000kg, 1250kg), packaging can also be customized, and it is moisture-proof and wear-resistant, ensuring that the product is intact and ready for use at any time. Suitable for sea, land, and air transportation.
7. Complete qualification certification and third-party testing support
We provide complete testing reports and support third-party testing. The product complies with international trade standards and has been widely recognized by customers worldwide.
FAQ
Q1: What are the core advantages of low Na2O tabular alumina?
A1: Its core advantage is its low Na2O content, which greatly improves high-temperature stability, corrosion resistance, and service life, especially suitable for high-end refractory materials and ceramic scenes.
Q2: What particle size products can you provide?
A2: We offer regular particles (0-1mm, 1-3mm, 3-5mm, 5-8mm) and 325 mesh fine powder, and support customized particle size processing.
Q3: Can you provide free samples for testing?
A3:Yes, we offer free samples.
Q4:Is this product suitable for refractory materials in cement rotary kilns?
A4: Yes. Its low sodium content, high density, and corrosion resistance fully meet the requirements of alkali corrosion and high temperature for cement kiln applications.
Q5: What payment terms do you accept?
A5:We accept wire transfers: a 30% deposit is paid upon placing the order, and the remaining balance is paid in full before shipment.
Contact us now for quotation, sample application, and customized raw material solutions!
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