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Introduction Particle Size Distribution,
3M Advanced Materials DivisionIntroductionCeradyne, Inc., a 3M company, offers high-purity ceramic powders used as resin fillers. 3m fused silica 20 and 3M fused silica 40 have electrically insulating properties, a very low coefficient of thermal expansion, and good resistance to heat and fused silica 20 and 40 are available in 55 lbs. (25 kg) paper bags or 2,200 lbs. (1,000 kg) tote and Benefits Very low coefficient of thermal expansion High temperature resistance High hardness ( Mohs scale) High chemical purity High corrosion resistance Extensive optical transmission from UV to IR Excellent electrical insulation properties Low density Low thermal conductivityParticle Size Distribution, % Retained(Not for specification purposes) Mesh (ASTM No.)Microns3M fused silica 203M fused silica 401001500< < < <1<1032545<315 30 Typical Physical Properties(Not for specification purposes)Property3M fused silica 203M fused silica 40 Microtrac PM, 50%9 16 m 19 27 mBET Surface Area<3 m2 m2/gMagnetics (Buck Analyzer)<20 ppmElectrical Conductivity<5 mhosApparent Specific g/ccLTE Coefficient (20 700 C) 10-6/ CTypical Chemical Analysis(Not for specification purposes)Property3M fused silica 20 and 40 SiO2> <1700 ppmFe2O3<350 ppmTiO2<250 ppmK2O<120 ppmCaO<75 ppmNa2O<50 ppmLOI @ 1000 C< silica for Investment Cas
3M Advanced Materials Division Introduction Ceradyne, Inc., a 3M company, offers high-purity ceramic powders used as resin fillers. 3M™ Fused Silica 20 and 3M™ Fused Silica 40 have electrically
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