Reactive Alumina HA180 Powder for Ultra-Low Cement Castables and Engineered Structural Ceramics

HUAO Reactive Alumina HA180 is a premium-grade, sub-micron reactive alumina powder engineered for high-performance refractory and advanced technical ceramic formulations. Manufactured in our ISO 9001, ISO 14001, and ISO 45001 certified facilities, HA180 features a tightly controlled monodisperse "singlet" particle distribution with a median particle size (D50) of 1.8 μm and a BET surface area of 2.1 m²/g. As an established China reactive alumina manufacturer with over 10 years of international B2B export experience, HUAO produces HA180 using specialized thermal calcination and fine-milling technology. The resulting product exhibits rapid sintering reactivity, low water demand, and high packing density, making it an essential matrix component in low-cement (LCC), ultra-low cement (ULCC), and cement-free castable systems.

• Controlled Singlet Particle Distribution: A monodisperse singlet grain distribution guarantees tight particle size uniformity, preventing local agglomeration and promoting optimal grain packing.
• Tightly Regulated Median Grain Size: A narrow median size range (D50: 1.4-2.3 μm, typical 1.8 μm; D90 ≤ 6.0 μm) ensures efficient space-filling within refractory aggregate matrices.
• Low Water Absorption & Enhanced Rheology: Specific BET surface area controlled between 1.5-3.0 m²/g (typical 2.1 m²/g) enables high slurry flowability while minimizing water additions in unshaped castables.
• High Chemical Purity: Strict controls over impurities—Na₂O ≤ 0.20%, Fe₂O₃ ≤ 0.05%, and SiO₂ ≤ 0.08%—preserve high-temperature refractoriness and hot modulus of rupture (HMOR).
• Accelerated Low-Temperature Sintering: Fine micro-grain morphology drastically increases solid-state reactivity, accelerating full densification during firing cycles.

• High-Performance Monolithic Castables: Serves as an essential reactive binder and matrix modifier in Low-Cement Castables (LCC), Ultra-Low Cement Castables (ULCC), and self-flowing castables used in steel ladles and tundishes.
• Technical & Advanced Ceramics: Used in structural ceramic components, wear-resistant tiles, and high-purity electrical ceramics requiring uniform density and mechanical strength.
• Shaped Refractory Products: Acts as a high-reactivity additive in fired refractory bricks and functional ceramics to enhance cold crushing strength (CCS) and resistance to thermal shock.

• Certified In-House Production: Operating under strict ISO 9001, ISO 14001, and ISO 45001 management systems, HUAO maintains complete batch-to-batch quality tracking across every lot of reactive alumina.
• Superior Flowability & Processing: The singlet particle morphology of HA180 reduces inter-particle friction, allowing formulators to achieve superior castable placement with reduced mixing liquid requirements.
• Direct Factory Source & Supply Security: As a trusted global B2B supplier with dedicated milling capacity, HUAO guarantees continuous bulk delivery and stable pricing directly from our manufacturing base.
• Precise Particle Size Consistency: Advanced laser diffraction testing (Cilas) ensures every batch adheres strictly to the target D50 (1.8 μm) and D90 (≤ 6.0 μm) parameters.

HUAO offers custom particle sizing, specialized surface area modifications, and tailored technical support to match client specific recipe requirements. Standard export packaging options include 25kg multi-wall paper bags, 1000kg jumbo bulk bags (ton bags), or custom palletized units with moisture-proof protective wrapping.

We also provide other alumina products. If you would like to learn more about Alumina Ceramic Tubes, please click here.