Black Silicon Carbide SiC>= 98%

Black Silicon Carbide SiC98 is high-purity black carborundum material . It is synthesized via 2200℃ resistance furnace smelting of high-purity quartz sand and low-impurity petroleum coke.

Its main silicon carbide mass fraction reaches ≥98%, with ultra-limited free carbon, iron oxide and alumina impurities. Compared with medium/low-grade SiC90 and SiC97, SiC98 features higher thermal shock resistance, fewer surface scratches during polishing and better chemical inertness. Our factory supplies complete specifications including lump, granule and fine powder (0-5mm / 0-10mm / 10-50mm), widely applied in precision abrasive tools, advanced sintered ceramics, kiln furniture and semiconductor auxiliary raw materials.

① Precision Abrasive Industry

SiC98 is premium raw material for resin grinding wheels, water jet sandpaper and polishing slurry. Ultra-low iron impurities prevent workpiece stains, ideal for optical glass, titanium alloy, bearing steel and cemented carbide fine grinding & mirror finishing.

② Advanced Sintered Functional Ceramics

Sinter into SiC mechanical seals, wear-resistant nozzles and cutting tools. High purity reduces internal pores, improves tensile strength and service life for aerospace mechanical components.

③ High-Grade Refractory & Kiln Furniture

Manufacture SiC crucibles, kiln shelves and burner tubes for aluminum melting and ceramic firing kilns. Outstanding anti-slag erosion reduces furnace maintenance frequency.

④ Steel & Foundry Metallurgy

High-efficiency deoxidizer and grain refiner for high-strength alloy steel; added to molten iron to reduce white cast defects of premium ductile iron castings.

⑤ Electronic & Semiconductor Auxiliary Materials

Medium-fine SiC98 powder for silicon wafer rough lapping, high thermal dissipation substrates for high-power semiconductor devices.

⑥ Chemical Catalyst Carrier

Large specific surface area and stable high-temperature performance, suitable for high-temperature acid-base industrial catalytic reactors.

Q1: What is the main difference between SiC98 and SiC97/SiC90?

A: SiC98 strictly limits free carbon and iron oxide impurities, for precision polishing and high-end ceramics; SiC97 for general abrasive production; SiC90 low-cost mass refractory aggregate.

Q2: Which particle size of SiC98 fits optical glass mirror polishing?

A: 0-5mm fine powder or FEPA 800/1200 mesh micro SiC98 for ultra-smooth workpiece surface.

Q3: What are the service life advantages of SiC98 refractory kiln furniture?

A: Under 1200℃ cyclic firing environment, service life is twice longer than SiC90 products, lowering kiln shutdown maintenance cost.

Q4: Do you provide free test samples & customized specifications? What is delivery time?

A: Free 1–5kg test samples available. Standard in-stock goods:7–15 working days; customized purity/particle size:20–30 working days. MOQ 25 tons full container, T/T & L/C payment supported.

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