China Low Impurity Black Silicon Carbide Powder Carborundum

High Quality Low Impurity Black Silicon Carbide Powder Carborundum
Black silicon carbide (C) is produced by petroleum coke, quality silicon sand and appended with salt in an electric arc furnace at high temperatures. The hardness and brittleness are lower than that of green silicon carbide. The materials are used to grind cast iron, non-ferrous metals, rubber, leather, plastic, wood, mineral rocks, etc. It can also be used to manufacture high-class refractory products.

Grain Usages and TypesUsageFor bonded abrasivesFor coated abrasivesTypeCC-P

Physical CharacteristicsItemBasic mineralCrystal systemCrystal colorMohs
hardnessDensityBlack silicon carbideα- SiCHexagonalBlack9.15≥3.12g/cm3ItemMicro hardnessElectrical
resistivityGrinding ability(compared with
diamond as one)Linear expansion
coefficient(when 900ºC α•10-6k-1)Black silicon carbideHV3100-32803x105-3x107Ω•cm0.254.4

Chemical CompositionGB/T 2480-2008TypeGritChemical composition(%,by weight)SiCF.CFe2O3CF4-F90≥98.60≤0.20≤0.40F100-F150≥98.10≤0.25≤0.50F180-F220≥97.20≤0.30≤0.55F230-F280≥97.20≤0.30≤0.55F320-F500≥97.00≤0.35≤0.60F600-F800≥96.50≤0.40≤0.60F1000-F1200≥95.50≤0.50≤0.70C-PP12-P100≥98.60≤0.20≤0.40P120-P150≥98.10≤0.25≤0.50P180-P220≥97.20≤0.30≤0.55P240-P360≥97.20≤0.30≤0.55P400-P1000≥97.00≤0.35≤0.60P1200-P1500≥96.50≤0.40≤0.60P2000-P2500≥95.50≤0.50≤0.70

Note: Special requirements on chemical composition and other terms can be satisfied through discussion.