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Crystalline Silica Powder - 结晶硅微粉

Crystalline Silica Powder

Crystalline Silica Powder

Made from natural quartz through fine grinding and classification, featuring high purity, high whiteness, uniform particle size and stable chemical properties. Widely used in coatings, rubber, plastics, adhesives and other fields.

Specifications

SiO₂ Content≥99.5%
Whiteness≥92
Particle Size (D50)2-45μm
Mohs Hardness7
Density2.65 g/cm³
Moisture≤0.1%
Oil Absorption25-35 g/100g
PH Value6.5-7.5
Loss on Ignition≤0.3%
Conductivity≤50 μs/cm

Product Models & Specifications

Model Mesh D50 Purity Applications
SA-90 — 90 μm ≥99.5% Coarse FillingThermal Pads
SA-45 — 45 μm ≥99.5% Thermal PadsPotting Compounds
SA-20 — 20 μm ≥99.5% Thermal GelsPotting Compounds
SA-10 — 10 μm ≥99.5% Electronic PackagingPotting Compounds
SA-5 — 5 μm ≥99.5% Electronic GradeThermal Gels

Applications

Coatings Rubber & Plastics Adhesives Precision Casting Building Materials
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FAQ

What is spherical alumina?

Spherical alumina is high-purity spherical alumina powder with excellent thermal conductivity, insulation and wear resistance.

What particle sizes are available?

Standard D50 from 5μm to 90μm. Choose based on thermal conductivity requirements.

What is it used for?

Mainly used in thermal pads, thermal gels, potting compounds and electronic packaging.

Why use spherical alumina for thermal fillers?

Spherical particles give higher filling rate, better thermal pathways and lower viscosity, significantly boosting thermal conductivity.

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