Tabular Alumina
1. High purity and stable performance Al₂O₃ ≥99%, with no sintering aids and very low impurities, minimizes system contamination and suits high-performance refractories. 2. High refractoriness and temperature resistance A melting point of 2050℃ and a maximum service temperature a...
Read the full description- Color
- White crystals or powder
- Mesh size
- 200#, 325#
- Bulk density
- ≥3.50 g/cm³
- True density
- ≥3.96 g/cm³
Bodan supplies this item to specification. Share the material, machine and required finish and we will confirm the grade, dimensions and packing for your order.
Advantages
Key features
-
High purity and stable performance
Al₂O₃ ≥99%, with no sintering aids and very low impurities, minimizes system contamination and suits high-performance refractories.
-
High refractoriness and temperature resistance
A melting point of 2050℃ and a maximum service temperature above 1800℃ suit various industrial furnaces.
-
Good thermal shock resistance
The distinctive tabular crystal structure and closed pores provide minimal reheating shrinkage and excellent thermal shock resistance, helping prevent cracking under rapid temperature changes.
-
High bulk density and low porosity
Bulk density of 3.5-3.68 g/cm³, low apparent porosity (≤5%) and low water absorption reduce liquid demand in refractory formulations.
-
High mechanical strength and wear resistance
Interlocking plate-like crystals increase particle mechanical strength and provide good flexural strength and wear resistance.
-
Strong chemical stability
Excellent acid and alkali resistance suits varied chemical environments.
Technical data
Specifications
- Color
- White crystals or powder
- Mesh size
- 200#, 325#
- Bulk density
- ≥3.50 g/cm³
- True density
- ≥3.96 g/cm³
- Melting point
- 2050℃
- Mohs hardness
- ≥9.0
- Particle size — Metric
- 0-1 mm, 1-3 mm, 3-5 mm, 5-8 mm
- Crystal system
- Trigonal crystal system
- Specifications — Metric
- 0-1 mm, 1-3 mm, 3-5 mm, 5-8 mm
- Specifications — Mesh size
- 200#-0, 325#-0
- Water absorption
- ≤1.5%
- Apparent porosity
- ≤5%
- Max service temperature
- 1800℃
Product details
About this product
Product Overview
Tabular alumina (TA) is a pure, fully shrunk sintered corundum made without sintering aids such as MgO or B₂O₃. Its main phase is α-Al₂O₃, with large, well-developed tabular crystals and over 99% Al₂O₃. Rapid sintering at 1925℃, just below the 2050℃ melting point of α-Al₂O₃, produces fully recrystallized plate-like grains with numerous rounded, closed pores within and between crystals.
Sized aggregate grades include 0-1, 1-3, 3-5 and 5-8 mm; fine powder grades include 200# and 325#. Other specifications can be customized.
Core Advantages
1. High purity and stable performance
Al₂O₃ ≥99%, with no sintering aids and very low impurities, minimizes system contamination and suits high-performance refractories.
2. High refractoriness and temperature resistance
A melting point of 2050℃ and a maximum service temperature above 1800℃ suit various industrial furnaces.
3. Good thermal shock resistance
The distinctive tabular crystal structure and closed pores provide minimal reheating shrinkage and excellent thermal shock resistance, helping prevent cracking under rapid temperature changes.
4. High bulk density and low porosity
Bulk density of 3.5-3.68 g/cm³, low apparent porosity (≤5%) and low water absorption reduce liquid demand in refractory formulations.
5. High mechanical strength and wear resistance
Interlocking plate-like crystals increase particle mechanical strength and provide good flexural strength and wear resistance.
6. Strong chemical stability
Excellent acid and alkali resistance suits varied chemical environments.
Chemical Specifications
| Specification | Al2O3 | Fe2O3 | Na2O | SiO2 |
|---|---|---|---|---|
| 0-1mm | ≥99.2% | ≤0.02% | ≤0.4% | ≤0.1% |
| 1-3mm | ≥99.2% | ≤0.02% | ≤0.4% | ≤0.1% |
| 3-5mm | ≥99.0% | ≤0.02% | ≤0.4% | ≤0.1% |
| 5-8mm | ≥99.2% | ≤0.02% | ≤0.4% | ≤0.1% |
| 200#-0 | ≥99.0% | ≤0.02% | ≤0.4% | ≤0.1% |
| 325#-0 | ≥99.2% | ≤0.02% | ≤0.4% | ≤0.1% |
Physical Properties
| Item | Property |
|---|---|
| Color | White crystals or powder |
| Crystal form | Trigonal crystal system |
| Mohs hardness | ≥9.0 |
| Melting point | 2050℃ |
| Maximum service temperature | 1800℃ |
| True density | ≥3.96 g/cm³ |
| Bulk density | ≥3.50 g/cm³ |
| Apparent porosity | ≤5% |
| Water absorption | ≤1.5% |
Applications
Steelmaking: blast-furnace linings, hot-blast stoves, iron-runner castables, torpedo ladle and steel ladle working linings, purging plugs, well blocks and slide gates
Refractory products: alumina-carbon, alumina-magnesia-carbon, magnesia-alumina-carbon, magnesia-spinel and alumina-chromia bricks
Monolithic refractories: high-alumina castables, ramming mixes, plastic refractories, spray mixes and precast shapes
Industrial furnaces: ceramic and glass kilns, petrochemical high-temperature equipment and cement kilns
Other applications: electrical insulators, kiln furniture, catalyst supports and epoxy resin fillers
Tabular alumina is used throughout nearly every stage of ironmaking and steelmaking.
Packaging
Packaging type / Specification / Applications
25 kg plastic woven bags / Double woven layers with a clear liner / Small orders and samples
Bulk bags / 1000 kg (1 ton) per bag / Large industrial orders
25 kg bags in a bulk bag / 40 × 25 kg bags per bulk bag / Flexible handling and efficient transport
25 kg bags on fumigation-free pallets / Forklift handling and warehouse stacking
Drum packaging: 25 or 20 kg drums on fumigation-free pallets / Premium customers and special protection requirements
Custom Packaging Service
Customized packaging can include:
Custom capacities, such as 1000 or 1250 kg bulk bags
Custom labels and branding in Chinese or English
Special moisture- and contamination-resistant packaging
Use and Storage Recommendations
1. Combine sized aggregate and fine powder
In refractory castables, aggregate forms the structural skeleton and fine powder fills the matrix voids. Select a suitable grading according to the formulation.
2. Storage Conditions
Store in a dry, ventilated place away from moisture and corrosive substances such as acids and alkalis. Do not exceed the specified stacking height to prevent packaging damage.
3. Custom Services
Water washing and other treatments are available to meet purity requirements.
Frequently Asked Questions
How does tabular alumina differ from white and brown fused alumina?
Tabular alumina is sintered at high temperature to form plate-like crystals with closed pores, providing excellent thermal shock and volume stability. White and brown fused alumina are made by arc melting. Tabular alumina is relatively more expensive, but its performance is better suited to premium refractory applications.
What is the difference between tabular alumina aggregate and fine powder?
Sized aggregate (0-1 to 5-8 mm) forms the refractory skeleton; fine powder (200#-0 and 325#-0) fills the matrix. Combining them can optimize density and performance.
Can the product be used in high-temperature steelmaking environments?
Yes. Tabular alumina has a melting point of 2050℃, a maximum service temperature above 1800℃, and excellent thermal shock and slag resistance. It is widely used in blast-furnace linings, ladle castables and slide gates.
Are custom specifications available?
Yes. Special aggregate and fine powder sizes and tailored particle-size distributions can be supplied.
What is the minimum order quantity?
Standard orders start from one 25 kg bag. Bulk bags are normally shipped as complete units.
Can packaging be customized?
Yes. Bulk bag capacities, label designs and special packaging formats can be customized.
Resources
Documents
Data sheets, test reports and packing details for this product are issued on request. Send an inquiry and our technical team will return the documents that match your application.
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