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$Low-Soda Reactive Alumina Micro-Powder HA120 with BET 4.8 m²/g and Doublet Particle Distribution for Refractory Castables$

Low-Soda Reactive Alumina Micro-Powder HA120 with BET 4.8 m²/g and Doublet Particle Distribution for Refractory Castables

Name: Low-Soda Reactive Alumina Micro-Powder HA120 with BET 4.8 m²/g and Doublet Particle Distribution for Refractory Castables
Brand: Zibo Huao New Materials Co., Ltd.
SKU: Reactive Alumina
Price: Negotiable USD
Availability: InStock

Product Details

Place of Origin: Shandong, China

Brand Name: HUAO

Certification: ISO9001, ISO14001, ISO45001

Model Number: Reactive Alumina

Document: HUAO HA120 Reactive Alumina...na.pdf

Payment & Shipping Terms

Minimum Order Quantity: Negotiation

Price: Negotiation

Packaging Details: 25kg/ 50kg/ 1000kg/ 1250kg/ Jumbo(BB); Or As Customer's Requirement

Delivery Time: Normally 15 days

Payment Terms: L/C,T/T

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Product Details

Product Description

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                                                                                                                                                                                                                                                                                                                Low-Soda Reactive Alumina Micro-Powder, BET 4.8 m²/g Alpha-Alumina Micro-Powder, Doublet Particle Distribution HA120 Alumina
                              

Na₂O(%):	0.08, 0.12	Fe₂O₃(%):	0.03
MgO(%):	0.03	SiO₂(%):	0.03, 0.07
CaO(%):	0.03	Surface Area/BET(m²/g):	4.0, 4.8, 5.5
D50 Cilas(μm):	0.8, 1.2, 1.5	D90 Cilas(μm):	4.7, 5.5, 6.8

Na₂O(%):	0.08, 0.12
Fe₂O₃(%):	0.03
MgO(%):	0.03
SiO₂(%):	0.03, 0.07
CaO(%):	0.03
Surface Area/BET(m²/g):	4.0, 4.8, 5.5
D50 Cilas(μm):	0.8, 1.2, 1.5
D90 Cilas(μm):	4.7, 5.5, 6.8

Low-Soda Reactive Alumina Micro-Powder HA120 with BET 4.8 m²/g and Doublet Particle Distribution for Refractory Castables

HA120 Reactive Alumina Powder with Low Na₂O and Doublet Particle Size Distribution

Product Overview

HUAO HA120 Reactive Alumina Micro-Powder is a high-purity alpha-alumina (α-Al₂O₃) engineered with a tailored doublet (bimodal) particle size distribution for advanced refractory castables and technical ceramics. Featuring a median particle size of D50 = 1.2 μm, a typical BET surface area of 4.8 m²/g, and strictly controlled chemical impurities (Na₂O ≤ 0.12%, SiO₂ ≤ 0.07%, Fe₂O₃ typical 0.03%), HA120 delivers an optimal balance between matrix fluidity and sintering activity. By optimizing grain packing efficiency and significantly reducing mixing water demand, HA120 promotes rapid solid-state sintering, providing superior mechanical strength, high thermal shock endurance, and robust protection against aggressive molten slag erosion.

Technical Specifications

Parameters	Typical Value	Min Value	Max Value
Na₂O	0.08 %	--	0.12 %
Fe₂O₃	0.03 %	--	--
MgO	0.03 %	--	--
SiO₂	0.03 %	--	0.07 %
CaO	0.03 %	--	--
Surface Area (BET)	4.8 m²/g	4.0 m²/g	5.5 m²/g
D50 Cilas (Median Particle Size)	1.2 μm	0.8 μm	1.5 μm
D90 Cilas	5.5 μm	4.7 μm	6.8 μm
Particle Distribution	Doublet	--	--

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

Key Features

Features a bimodal particle size profile centered at D50 = 1.2 μm (D90 typical 5.5 μm) that optimizes inter-particle packing density, allowing formulation designers to achieve high matrix density with reduced mixing water.
With a high BET surface area of 4.8 m²/g (range 4.0-5.5 m²/g), HA120 provides strong sintering reactivity at reduced temperatures, forming a robust ceramic bond during heat-up.
Ultra-low alkali (Na₂O ≤ 0.12%) and silica (SiO₂ ≤ 0.07%) guard against early liquid phase formation, preserving hot modulus of rupture (HMOR) and load-bearing strength.
Enhances matrix flowability in low-cement and ultra-low-cement castables while providing dense resistance to molten iron and acidic or basic slag penetration.

Applications

Reactive Alumina HA120 enhances matrix structural density and superior slag resistance under severe thermal loads, while providing outstanding resistance to thermal shock and mechanical erosion under continuous molten metal flow. Engineered for demanding functional refractories, it is ideal for porous purging plugs, seating blocks, and shrouds requiring dense microstructures. In gunning and shotcreting applications, it optimizes slurry rheology, imparting excellent self-flowing capability while minimizing material rebound.

Why Choose HUAO

Operating in full compliance with ISO 9001 (QMS), ISO 14001 (EMS), and ISO 45001 (OHSMS) certified management systems, HUAO leverages over a decade of international B2B export expertise to ensure uncompromising quality control. We enforce hands-on, on-site production monitoring to guarantee exceptional batch-to-batch consistency in particle size distribution (PSD) and chemical purity. Direct-from-factory manufacturing delivers complete end-to-end traceability, reliable long-term supply capacity, direct-factory cost efficiency, and tailored technical support.

Customization

HUAO HA120 Reactive Alumina Micro-Powder is supplied in standard 25 kg moisture-proof multi-ply bags or heavy-duty 1,000 kg / 1,250 kg bulk jumbo bags (ton bags) fitted with protective polyethylene inner liners to prevent moisture absorption and contamination during maritime transport. To support specific processing conditions and automated dosing systems, HUAO provides tailored customization services—including targeted particle size distributions, controlled top-size limits, specialized palletization, extra protective outer wrapping, and private-label OEM export packaging upon request.

FAQ

Q1: What are the main benefits of HA120's doublet particle size distribution?

A1: The doublet (bimodal) distribution of HA120 (D50 = 1.2 μm) fills micro-voids between larger refractory aggregates more effectively than unimodal powders. This increases particle packing density, decreases water addition, and creates a denser fired structure.

Q2: How does HA120 compare to coarser reactive alumina grades like HA150 and HA180?

A2: HA120 has a finer median particle size (D50 = 1.2 μm) and higher BET surface area (4.8 m²/g) compared to HA150 (D50 = 1.5 μm, BET = 3.8 m²/g) and HA180 (D50 = 1.8 μm, BET = 2.1 m²/g). This gives HA120 higher sintering activity and superior flow characteristics in fine matrix formulations.

Q3: Why is low Na₂O (≤ 0.12%) critical for HA120 in high-temperature applications?

A3: Alkali oxides such as Na₂O act as fluxing agents that form low-melting-point glass phases at elevated temperatures. Keeping Na₂O ≤ 0.12% prevents structural softening and maintains high refractoriness under load.

Q4: Is HA120 suitable for self-flowing castables and gunning spray coatings?

A4: Yes, HA120 is widely used in self-flowing castables, spray coatings, and repair mixes because its particle distribution promotes favorable rheology, reduces water demand, and enhances adhesion during application.

Q5: Can HUAO tailor the particle distribution or packaging for HA120 orders?

A5: Yes, HUAO offers custom grain size adjustments to match specific process requirements, alongside flexible packaging options including 25 kg bags and jumbo ton bags.

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

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