High-Purity Refractory & Precision Abrasive
白刚玉 · White Corundum · White Aluminium Oxide
Al₂O₃ ≥ 99% · Friable · Contamination-free
White fused alumina is produced by fusing high-purity calcined alumina in an electric arc furnace. With Al₂O₃ ≥ 99% and very low soda, it is harder and more friable than brown alumina — delivering a cool, sharp cut and a contamination-free finish for precision and high-purity work.
White fused alumina (WFA), or white corundum, is the high-purity member of the fused-alumina family. Made by fusing pure calcined alumina (rather than bauxite), it contains Al₂O₃ ≥ 99% with very low iron and soda. The crystal is harder and more friable than brown fused alumina, so the grain fractures to expose fresh cutting edges — giving a cool, sharp cut that minimises burn on heat-sensitive workpieces.
That friability and chemical purity make WFA the grain of choice for precision grinding wheels, tool and cutter sharpening, and finishing of hardened steels and superalloys. Its contamination-free profile suits dental, medical, jewellery and optical polishing, while the high Al₂O₃ content supports high-alumina refractory bricks, castables, kiln furniture and technical ceramics.
Global Vista supplies WFA in tight FEPA grit cuts and JIS micro-powder grades, plus refractory sizing, from qualified producers in Henan and Shandong. Every lot ships with a COA and optional third-party inspection.
* Values are indicative typical/guaranteed figures and can be tailored to your specification. A Certificate of Analysis (COA) is delivered with every shipment; third-party inspection (SGS / Bureau Veritas / Intertek / CIQ) available on request.
Medium
Precision surface and cylindrical grinding wheels for steels and alloys.
Common: precision grinding
Fine
Tool and cutter grinding, finishing wheels and fine coated abrasives.
Common: tool sharpening
Very fine
Lapping, honing and ultra-fine finishing of hardened workpieces.
Common: lapping / honing
JIS / W grades
Polishing compounds, dental and optical media, technical ceramics.
Common: polishing / ceramics
Vitrified and resin wheels for tool steels, bearings, superalloys and hardened parts where a cool, burn-free cut is critical.
Contamination-free polishing and micro-blasting media for dental labs, surgical components and jewellery finishing.
High-purity bricks, castables, kiln furniture and saggers for furnaces, foundries and the ceramic industry.
Raw material for high-alumina ceramics, grinding media and wear-resistant components.
Fine micro-powder for precision lapping, honing and ultra-smooth surface finishing.
High-purity facing and mould material for aerospace and precision investment casting.
Lot-traceable chemical and physical analysis with every shipment.
SGS, Bureau Veritas, Intertek or CIQ pre-shipment inspection on request.
Pre-shipment sample for your lab verification before bulk order.
Grade and granulometry tailored to your process, not sold as a generic commodity.
Tianjin Xingang · Qingdao · Shanghai
25kg PP/paper bags (palletized), 1 MT jumbo bags. Sealed liners for micro-powder grades.
FOB, CIF, CFR, DAP available.
T/T or irrevocable L/C at sight. USD / EUR / JPY settlement.
15–25 days from order confirmation to vessel sailing.
White fused alumina is used for precision grinding wheels, tool sharpening, lapping/honing, dental and medical polishing, high-alumina refractory bricks and castables, and technical ceramics. Its Al₂O₃ ≥ 99% purity and friable grain give a cool, contamination-free cut.
WFA is made from pure calcined alumina rather than bauxite, so the raw material costs more and the product is purer (Al₂O₃ ≥ 99% vs ≥ 95%). It is harder, friable and contamination-free, which is required for precision and medical-grade work.
Yes — JIS #240 to #3000 and W63 to W1.5 micro-powder for polishing compounds, lapping and ceramics, with controlled particle-size distribution. COA included.
Yes. The high Al₂O₃ content and low fluxing impurities make WFA an excellent aggregate for high-alumina bricks, castables, kiln furniture and saggers operating at high temperature.
Trial orders from 20 MT. Production orders typically 50–500 MT. Custom grit blends and annual contracts available.
Yes — we supply to FEPA, JIS or ANSI grit standards and can match a reference sample's particle-size distribution for orders ≥ 100 MT.
Specify your grade/size, quantity and destination port — we respond within one business day with FOB China and CIF quotes.
Tougher, lower-cost Al₂O₃ ≥ 95% for general grinding, blasting and refractories.
View product →Harder abrasive (Mohs 9.5) for the hardest grinding and refractory duties.
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