Aerogel powder

When evaluating Aerogel Powder, the most critical factors are pore size (typically 20-50nm), specific surface area (500-1000 m²/g), and particle size distribution. For thermal insulation applications, ensure the thermal conductivity is extremely low (usually 0.012-0.020 W/m·K). Additionally, verify the hydrophobicity degree; high-quality industrial aerogel should have a water contact angle >150° to prevent moisture absorption which degrades insulation performance.

Aerogel is often used in sensitive industries like aerospace or oil and gas. You must request REACH and RoHS certifications to ensure the absence of hazardous substances. Since fine powders pose inhalation risks, the supplier must provide a comprehensive Material Safety Data Sheet (MSDS). For construction use, check for Class A1 non-combustibility ratings according to EN 13501-1 or equivalent fire safety standards.

Aerogel powder is primarily used as an additive in thermal insulation coatings, ultra-thin winter apparel, and industrial pipeline insulation. For coatings, the powder must have excellent dispersibility to avoid clumping. For textile applications, focus on breathability and compression resistance, ensuring the aerogel structure doesn't collapse under physical pressure.

Request a BET (Brunauer-Emmett-Teller) test report to confirm the surface area and a SEM (Scanning Electron Microscope) image to verify the nanoporous structure. Authentic aerogel is characterized by its extremely low bulk density (typically 40-150 kg/m³); if the powder feels heavy, it may be a low-grade composite or silica fume rather than true aerogel.

The primary risk is moisture contamination and physical compaction during transit. Aerogel is highly sensitive to humidity if the packaging is breached. Ensure the supplier uses vacuum-sealed moisture-proof bags and reinforced outer drums. Because of its low density, shipping is often charged by volumetric weight, so optimize packaging dimensions to reduce freight costs.

Focus on tiered pricing based on volume, as the production of aerogel involves expensive supercritical drying processes. Ask for a sample trial (1-5kg) before committing to a metric ton. Negotiate for OEM/Customization services, such as specific particle size milling or surface modification (hydrophilic vs. hydrophobic), which can save you processing costs later.

Always use secure payment terms and consider third-party pre-shipment inspections. Given the technical nature of aerogel, specify the exact technical parameters in the Proforma Invoice (PI). Use platforms like Made-in-China.com to vet the supplier's business license and production capacity to avoid trading companies posing as manufacturers.

Ensure the HS Code (typically 2811.22 for Silicon Dioxide) is correctly declared to avoid customs delays. Since it is a fine powder, some carriers may classify it as 'sensitive cargo.' Provide a Non-Hazardous Chemical Declaration and the DGM (Dangerous Goods Management) transport certificate to facilitate smooth air or sea freight clearance.