98% Purity Microsilica Powder with High Pozzolanic Activity and Ultra-Fine Particle Size for Concrete and Refractory Applications
Price:
Please contact customer service
MOQ:
10Tons
Delivery Time:
About six weeks
Brand:
SiChun HongJian
Product Description
Microsilica Powder 98% - Concrete Additive, Refractory Material, Filler for Polymer
Microsilica, also known as silica fume or condensed silica fume, is an ultra-fine, high-purity amorphous silicon dioxide (SiO₂) powder collected as a by-product from silicon metal and ferrosilicon alloy furnaces. This grayish-white powder features an average particle size of 0.1-0.3 microns with very high specific surface area (15-30 m²/g), high pozzolanic activity, and excellent filling properties.
Key Product Characteristics
- High SiO₂ content (≥92-98%)
- Ultra-fine particle size (0.1-0.3 microns)
- High specific surface area (15-30 m²/g)
- Excellent pozzolanic activity
- Superior filling effect
- High-performance mineral admixture
Core Applications & Benefits
High-Performance Concrete & Cementitious Materials
Microsilica significantly enhances concrete performance through pozzolanic reactions and micro-filling effects. It reduces porosity, increases density, and improves mechanical properties.
- Dramatically increases compressive and flexural strength
- Enhances impermeability and chloride ion resistance
- Improves abrasion resistance and reduces alkali-silica reaction
- Essential for ultra-high-performance concrete (UHPC), dams, bridges, and nuclear facilities
Refractory Materials Industry
Serves as an efficient binder and toughening agent in alumina-silica refractories.
- Improves bulk density and hot strength
- Enhances thermal shock and corrosion resistance
- Promotes sintering and increases medium-temperature strength
Polymer Composites & Electronic Materials
Functions as a reinforcing filler to enhance mechanical and thermal properties.
- Increases strength, hardness, and wear resistance in polymers
- Improves heat resistance and dimensional stability
- Key component in Epoxy Molding Compounds (EMC) for electronics
Additional Specialized Applications
- Chemical industry: matting agent, thickener, anti-caking agent
- Ceramics manufacturing: lowers firing temperatures, increases density
- Wear-resistant flooring and industrial coatings
- Catalyst support materials
Product Specifications & Grading
| Parameter | Specification |
|---|---|
| SiO₂ Content | 92%, 96%, 98% grades available |
| Particle Size | Average 0.1-0.3 microns |
| Specific Surface Area | 15-30 m²/g |
| Forms Available | Densified and undensified (as-produced) |
Safety & Handling: Microsilica is an ultra-fine powder that generates significant dust. Effective dust collection systems and proper respiratory protection are mandatory. Store in moisture-proof, sealed containers due to strong hygroscopicity.
Quality Assurance: Our microsilica products feature high SiO₂ content, excellent activity, optimal particle size distribution, and consistent quality. We provide technical support for concrete mix design, refractory formulations, and polymer modifications to optimize your material performance.
Similar Products
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Sichuan Hongjian Xinyi Technology Co., Ltd.
Location
604, 6th Floor, Unit 2, Building 1, No. 9 Vanke Road, Chenghua District, Chengdu
Contact Person
Leo Yang