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Tabular Alumina

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Tabular Alumina Specification

Usage & Applications
Refractories, Abrasives, Ceramic Shapes, Electrical Insulators

Surface Finish
Smooth

Hardness (%)
9 (Mohs scale)

Purity(%)
99.2%

Density
3.6 Gram per cubic centimeter(g/cm3)

Application
Steelmaking, Kiln furniture, Chemicals, Ceramics, Refractories, Electrical insulators

Melting Point
> 2000C

Water Absorption
Very low

Form
Granules, Powder, Spheres

Chemical Composition
Al2O3 99.2%

Product Type
Refractory Raw Material

Types of Refractories
Sintered, Fused, Tabular alumina

Shape
Granular, Lump, Powder

Porosity
Low porosity

Dimensional Stability
Excellent dimensional stability

Strength
High mechanical strength

Specific Gravity
3.5 - 3.6 g/cm

Thermal Conductivity
High

Color
White

Bulk Density
1.8-2.2 g/cm³ (depending on size and form)

Loss on Ignition (LOI)
<0.1%

Volume Stability
No shrinkage or expansion at high temperature

Particle Size
0-1mm, 1-3mm, 3-5mm, or custom sizes available

Storage Conditions
DRY and cool place, avoid water and humidity

pH
Neutral (pH ~7)

Packing
Standard 25kg or 50kg bags; jumbo bags on request

Thermal Shock Resistance
Excellent

Crystal Structure
Alpha alumina, fully sintered

About Tabular Alumina

Process of Production :

Tabular alumina is produced by using High grade industrial alumina as primary raw material, They are ground and fat sintered at super-High temperature (>1900degrees).
The product has a close packing structure of corundum grain size in the range from 1-2 µm to 100-200 µm with cross bonding and homogenized distribution, resulting in maximum packing density.

Character :

It is characterized by high refractoriness, high bulk density, High thermal shock resistance, High wear-resistance, high purity and High chemical resistance, complete crystal tabularization and low porosity.

Application :

It has been widely used as the material of choice in unshaped and shaped high performance refractories used in a variety of industries (Steel, Foundry, cement, glass, petrochemical, ceramic and waste incineration). Other common non-refractory applications include its use in kiln furniture and for metal filtration.

It is the preferred material to substitute for imported sintered alumina.

Technical Specification :

Items		Unit	Index	Typical
Chemical composition	AI₂O₃	%	99.00 min	99.5
	SiO₂	%	0.20 max	0.09
	Fe₂O₃	%	0.10 max	0.07
	Na₂O	%	0.40 max	0.20
	CaO	%	0.1 max	0.03
	MgO	%	0.1 max	0.06
	R₂O	%	0.3 max	0.20
Bulk Density		g/cm3	3.50 min	3.59
Absorbing water rate		%	0.1 max	0.7
Porosity rate		%	4.0 max	3.00
Grain Size		mm	5-3mm, 3-1mm, 1-0mm, 2-1mm, 1-0.5mm, 0.6-0.2mm, 0.5-0mm, 0.3-0mm
Fine Powder		mesh	-220mesh, -325mesh

Low cost WTA Fines : Is a very cost effective product in -200 and -325 mesh which can be used in Refractory shapes and castables.

Outstanding Dimensional & Volume Stability

Tabular Alumina excels in environments requiring absolute dimensional and volume stability at elevated temperatures. With no observable shrinkage or expansion during high-temperature exposure, it is particularly suited for critical refractory linings, kiln furniture, and shaped ceramic parts where maintenance of component geometry is paramount.

Versatility in Particle Sizes and Forms

Whether you require powder, granular, or larger lumps, Tabular Alumina can be supplied in standard sizes from 0-1mm up to 3-5mmor customized for unique processes. Its uniform smooth surface and highly pure crystal form make it adaptable for a wide range of demanding industrial applications.

FAQs of Tabular Alumina:

Q: How should Tabular Alumina be stored to preserve its quality?

A: To maintain Tabular Aluminas properties, store it in a dry, cool place, avoiding any exposure to water and humidity. Proper storage helps ensure its low water absorption and mechanical strength remain uncompromised over time.

Q: What are the primary uses of Tabular Alumina in industry?

A: Tabular Alumina is widely used in steelmaking refractories, kiln furniture, ceramic shapes, chemicals, electrical insulators, and abrasives. Its excellent thermal shock resistance, high purity, and stability make it suitable for applications demanding top-level mechanical and thermal performance.

Q: When is it advantageous to select Tabular Alumina for refractory applications?

A: Tabular Alumina is preferred in scenarios where high mechanical strength, superior thermal conductivity, and resistance to thermal shock are required. Its excellent dimensional and volume stability under extreme temperatures makes it especially valuable for lining steel furnaces and other refractory assemblies.

Q: Where is Tabular Alumina commonly sourced and supplied from?

A: Tabular Alumina is manufactured and exported by specialized suppliers and exporters in India, accommodating both local and international industrial demands. Custom packing and delivery options (like jumbo bags) are typically available on request.

Q: What benefits does Tabular Alumina offer over other alumina types?

A: Compared to other forms, Tabular Alumina offers higher purity (99.2% Al2O3), superior mechanical strength, and excellent resistance to thermal shock, with minimal porosity and water absorption. Its fully sintered, alpha-phase structure ensures outstanding performance in harsh conditions.

Q: How is Tabular Alumina processed to achieve its crystal structure and strength?

A: Tabular Alumina undergoes a high-temperature sintering process, transforming alumina to the stable alpha phase. This process eliminates significant open porosity and imparts high density, strength, and thermal stability, resulting in a robust, durable material.

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