Product Overview

HUAO HA150 Reactive Alumina Micro-Powder is a high-purity alpha-alumina (α-Al₂O₃) engineered with a specialized multimodal particle size distribution for high-performance refractory castables and thermal engineering applications. Featuring a median particle size of D50 = 1.5 μm (typical BET surface area of 3.8 m²/g) and strictly controlled chemical impurities (Na₂O ≤ 0.12%, SiO₂ ≤ 0.07%, Fe₂O₃ typical 0.02%), HA150 optimizes matrix particle packing and significantly reduces mixing water requirements. It enhances matrix fluidity and accelerates solid-state sintering during firing, delivering high mechanical strength, excellent thermal shock resistance, and long-lasting erosion resistance against molten slag.

Technical Specifications

Note: Custom grain sizes can be prepared according to specific customer process requirements.

Key Features

1. HA150 is designed with a multimodal particle size distribution (D50=1.5 μ m, D90=5.0 μ m), allowing smaller particles to interlock in the voids between aggregates, maximizing bulk density, and minimizing water demand.
2. The BET surface area of HA150 is 3.8 m²/g (range 3.0 - 4.5 m²/g), which can promote rapid solid-state sintering at high temperatures without causing premature solidification or loss of processability during the mixing process.
3. Low alkali (Na₂O ≤ 0.12%) and low silica/iron contents (SiO₂ ≤ 0.07%, Fe₂O₃ typical 0.02%) mitigate glass-phase formation at high temperatures, preserving hot modulus of rupture (HMOR) and creep resistance.
4. Improves matrix flowability for dense, defect-free lining structures while providing strong protection against molten steel and slag penetration.

Applications

This Reactive Alumina provides substrate density and slag corrosion resistance, maintaining high structural integrity under continuous thermal cycling and erosion. It can be widely applied to porous blowing plugs, seat blocks, and shields that require dense microstructures. It can also provide optimal viscosity control and high fluidity.

Why Choose HUAO

Operating in full compliance with ISO 9001, ISO 14001, and ISO 45001 certified management systems, HUAO leverages over a decade of international B2B export expertise to deliver complete quality assurance. We maintain end-to-end oversight of product quality and batch-to-batch consistency—performing rigorous chemical purity analyses and Cilas laser particle size distribution testing to guarantee reliable procurement for global buyers. Our fully integrated production capability ensures stable volume supply, direct-from-factory cost efficiency, and tailored product solutions to meet exact technical specifications.

Customization

To meet specific industrial processing parameters and site-handling conditions, HUAO provides comprehensive customization services for HA150 Reactive Alumina Micro-Powder. Recognizing that different refractory formulations and technical ceramic applications demand precise particle packing, we offer fully tailored particle size distributions (PSD), including specialized cut-offs, targeted d50/d90 grain sizing, and tight top-size controls. In addition to material specifications, our export packaging can be customized to align with client logistics requirements--ranging from private-label OEM branding and anti-moisture barrier linings to reinforced palletization, wooden casing, and custom unit-weight bags (such as 25 kg, 50 kg, 1,000 kg, or 1,250 kg capacities).

FAQ

We also offer a complete line of high-purity alumina products. If you would like to explore our Calcined Alumina series, please contact our technical sales team.