Overview
Silica micro powder for ceramic rubber is a high-purity amorphous silica product designed to enhance the performance of rubber compounds in ceramic manufacturing. It acts as a reinforcing filler, improving mechanical strength, thermal stability, and wear resistance. This material is widely adopted in industrial applications due to its inert chemical properties and compatibility with rubber matrices. Its fine particle size ensures uniform dispersion, making it ideal for precision ceramic components requiring durability under stress.
Physical and Chemical Properties
The powder exhibits a stable amorphous structure with a typical purity exceeding 99% SiO₂. Its low thermal expansion coefficient (0.5×10⁻⁶/°C) minimizes dimensional changes in rubber-ceramic composites under temperature fluctuations. Key metrics include a controlled particle size distribution (5-50µm) and a high surface area (50-400 m²/g), which optimize bonding with rubber polymers. The material is chemically inert to acids and alkalis, ensuring compatibility with diverse processing conditions.
Main Applications
Primarily used in ceramic rubber seals, gaskets, and vibration dampers, this silica powder extends product lifespan by reducing abrasion. It is critical in high-temperature environments like kiln conveyor belts and industrial furnace components. Secondary applications include ceramic-coated hoses and anti-slip rubber flooring, where its thermal conductivity (1.4 W/m·K) helps dissipate heat. The automotive sector utilizes it for ceramic brake pad rubber binders to withstand friction-induced heat.
Safety and Storage
As a fine particulate, silica micro powder requires handling with NIOSH-approved N95 respirators to prevent inhalation risks. Static electricity during transport necessitates grounded containers to avoid dust explosions. Storage should maintain relative humidity below 50% to prevent clumping. Bulk bags must be kept sealed and away from oxidizers. Spills should be cleaned with HEPA-filter vacuums, not dry sweeping.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001-certified production facilities to ensure batch consistency. Technical datasheets must specify loss on ignition (LOI <0.8%) and trace metal content (Fe <200ppm). For large orders, request third-party lab reports verifying particle morphology (spherical preferred) via SEM imaging. Negotiate MOQs around 5 tons for competitive pricing, with bulk discounts available at 20-ton increments.
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