Product Features
High-temperature calcined alumina powder features a high melting point, excellent mechanical strength and hardness, high electrical resistivity and thermal conductivity, as well as high density, wear resistance, high-temperature resistance, and low water absorption.
It is widely used in shaped and monolithic refractories, refractory castable binders, wear-resistant abrasives, high-purity refractory fibers, and other industries.
Application Fields
Advanced Refractory Materials: refractory bricks, castables, high-temperature kiln furniture, refractory linings and other high-temperature refractory products
Structural Ceramics & Wear-Resistant Ceramics: ceramic valves, seals, ceramic liners, wear-resistant ceramic components
Electronic Ceramics & Substrate Materials: ceramic substrates, LED ceramic supports, insulating ceramics, ceramic packaging materials
Thermal Conductivity Fillers & Functional Fillers: fillers for thermally conductive silica gel, epoxy resin and engineering plastics
Precision Polishing & Grinding Materials: precision grinding and polishing of optical glass, sapphire, semiconductors and metals
Ceramic Coatings & High-Temperature Coatings: raw materials for high-temperature resistant, corrosion-resistant and wear-resistant ceramic coatings
Product Parameters
|
Grade |
Chemical Composition |
Physical Properties |
|||||
|
AI2O3(%) |
Na2O(%) |
SiO2(%) |
Fe2O3(%) |
specific surface area [m2/g] |
Original crystal grain size(μm) |
α-AI2O3(%) |
|
|
Refractory-Grade Calcined α-Alumina |
|||||||
|
NA-01 |
≥99.2 |
≤0.35 |
≤0.06 |
≤0.01 |
1.2 |
2-4 |
93 |
|
NA-02 |
≥99.5 |
≤0.2 |
≤0.06 |
≤0.01 |
0.9 |
2-4 |
94 |
|
NA-03 |
≥99.5 |
≤0.1 |
≤0.06 |
≤0.01 |
0.8 |
2-4 |
95 |
|
Activated Calcined α-Alumina |
|||||||
|
NA-04 |
≥99.5 |
≤0.15 |
≤0.05 |
≤0.01 |
1.2 |
1-2 |
92 |
|
NA-05 |
≥99.5 |
≤0.1 |
≤0.05 |
≤0.01 |
1.2 |
1-2 |
93 |
Packaging Specifications
25 kg / PVC Sack (Standalone)
1,000 kg / Bulk Bag (Loose Fill)
1,000 kg / Bulk Bag (Containing 40 × 25 kg sacks)
1,000 kg / Bulk Bag on Pallet
Custom: Flexible packaging designs available per client requirement.
Company Advantages
Shandong Leipu New Material Technology Co., Ltd. (Est. 2004) is a vertically integrated manufacturer with 22 years of experience in White Corundum, Low-Sodium variants, and Calcined Alumina. Our in-house capabilities cover the entire lifecycle: raw material prep, smelting, crushing, granulation, and micro-powder production.
We supply high-density, structurally compact White Corundum for top-tier refractories. Additionally, using our specialized tunnel and rotary kilns, we produce customizable Calcined Alumina for a wide range of industries, including ceramics, precision polishing, and semiconductor thermal packaging.
FAQ
Q: Are you a real factory? Do you offer competitive prices?
A: Yes, we are a direct manufacturer with 22 years of experience, no middlemen. We offer the most competitive ex-works prices and direct quality control.
Q: Can we get samples before placing an order?
A: We provide free samples for testing.
Q: What indicators are tested during quality inspection of alumina products?
A: Main indicators include purity, density, strength, dimensional accuracy, appearance, water absorption and temperature resistance, which are inspected item by item according to drawings and requirements.
Q: How long is the production cycle for custom-made alumina products with special specifications?
A: Generally 15–30 days. For complex structures or special processes, the delivery time shall be subject to final confirmation.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
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