Silica aerogel particles are a type of nanostructured material that is characterized by a 3D nanoporous structure. These materials are specifically designed to have a high porosity, typically ranging from 80% to 99%. The resulting material has an extremely low density, high thermal insulation, excellent acoustic dampening, flame retardancy, and environmental friendliness.
At Alfa Chemistry, we offer high-purity silica aerogel particles that can be used as functional additives or raw materials for a wide range of applications, such as thermal insulation, acoustics, mechanical engineering, optics, electronics, and pharmaceuticals. The white powder or translucent particles can be easily dispersed or embedded in various matrix systems, including polymers, composites, and coatings.
Specification
| Items | Parameters |
| Catalog | GEL-SAP |
| Thermal Conductivity | ≤0.015 W/(m·K) @ 25°C |
| Pore Size | 5–50 nm |
| Particle Size | ~10 μm |
| Porosity | >90% |
| Tap Density | ≤100 kg/m3 |
| Hydrophobic Rate | >99% |
| Storage Temperature | 5°C to 45°C |
*Note: The product parameters listed on the page are for reference only, and can be adjusted according to your actual needs.
Functional Advantages
Super Low Thermal Conductivity
The nanostructure of silica aerogel particles traps air molecules within the pores, drastically reducing convection and conduction pathways. The tortuous network forces heat to traverse an "infinitely long" conduction path, significantly inhibiting heat transfer. This makes them indispensable for applications where thermal efficiency is critical.
Acoustic Insulation
The combination of ultra-high porosity and nanoporous structure also endows it with excellent soundproofing performance. Silica aerogel particles break the original sound wave path and attenuate the sound wave in order to improve the sound insulation and noise control in the building interior and industrial equipment.
Exceptional Flame Retardancy
With over 99% of their composition being inorganic silica, these particles achieve a Grade A1 flame-retardant rating. They not only resist ignition but also contribute to reducing smoke and toxic gas emissions.
Hydrophobicity and Moisture Resistance
Alfa Chemistry's silica aerogel particles exhibit a hydrophobic rate exceeding 99%, effectively preventing moisture ingress. This ensures sustained thermal insulation performance even under high-humidity conditions, making them suitable for offshore platforms, pipelines, and humid environments.
High Specific Surface Area and Adsorption
Ultra-high specific surface area and nanoporous structure provide it with excellent adsorption effect. Silica Aerogel particles can be used for purification, filtration, and environmental protection, providing the function of adsorbing various impurities, VOCs, heavy metal ions, and so on.
Mechanical Reinforcement in Composites
In polymer and composite formulations, silica aerogel particles serve as functional fillers that lower material density while simultaneously enhancing thermal insulation, fire resistance, and impact resilience. This dual-functionality is critical for lightweight structural components in automotive and aerospace industries.
Environmental Safety
The product itself is an inorganic non-toxic material, so it is completely environmentally friendly during production and use. Alfa Chemistry ensures that products will meet global safety and environmental regulations and meet green production requirements.
Figure 1. Network architecture of an aerogel[1].
Application Spectrum
- Aerogel Thermal Insulation Coatings & Slurries: For building facades, pipelines, and industrial equipment.
- Polyester Chips & Functional Polyester Films: Enhances thermal and mechanical performance in packaging and specialty films.
- Insulation Foam Sheet Fillers: Improves insulation properties in foams for refrigeration, construction, and packaging.
- Purification & Adsorption Products: Effective in air and water purification systems due to high surface area.
- Nano Oil-Displacement Agents: Exploiting superhydrophobic and superlipophilic characteristics for enhanced oil recovery.
- Composite Material Reinforcement: Reduces weight while boosting thermal insulation, fire resistance, and mechanical durability.
Why Choose Us?
Alfa Chemistry is proud to provide our customers with high-quality silica aerogel particles. In addition, you can customize the product to meet your actual needs in different sizes, morphologies, and densities. If you need help, please call us and we will deliver the product on time and on budget.
FAQs About Silica Aerogel Particles
1. What makes silica aerogel particles more efficient than conventional insulation materials?
Their extremely low thermal conductivity, driven by nanoscale porosity, surpasses conventional materials by significantly minimizing heat transfer through conduction and convection.
2. Are silica aerogel particles safe to use in consumer products?
Yes, they are composed of inorganic, non-toxic silica, and their production and application processes adhere to environmental safety standards.
3. Can silica aerogel particles be used in humid environments?
Absolutely. With a hydrophobic rate exceeding 99%, they effectively repel water, maintaining insulation and structural integrity in high-humidity conditions.
4. How do silica aerogels contribute to sound insulation?
Their nanoporous structure disrupts sound wave transmission, making them highly effective in reducing noise across various frequencies.
5. Is there any specific storage condition for silica aerogel particles?
They should be stored between 5°C to 45°C to preserve their structural integrity and functional properties.
6. Can silica aerogel particles improve fire safety in buildings?
Yes. With a Grade A1 flame-retardant rating, they significantly enhance the fire resistance of materials they are incorporated into.
7. How do these particles perform in composite materials?
They reduce composite density while enhancing thermal insulation, flame retardancy, and mechanical strength, ideal for lightweight engineering applications.
8. Are there any pharmaceutical applications for silica aerogels?
Their high surface area and adsorption capacity open potential uses in drug delivery systems and pharmaceutical formulations, though specific applications depend on formulation requirements.
9. How does Alfa Chemistry ensure the quality of its silica aerogel particles?
We employ rigorous quality control and advanced characterization methods to guarantee consistent particle size, porosity, and functional performance across batches.
10. Are custom formulations or particle sizes available?
Yes, Alfa Chemistry offers customization options to tailor particle size, porosity, and hydrophobicity according to specific industrial needs.
Reference
- Thapliyal P. C, et al. Aerogels as Promising Thermal Insulating Materials: An Overview. Journal of Materials 2014. (3):1-10.
Please kindly note that our products and services are for research use only.
