WFA
White Fused Alumina
Mirror polishing · >99% α-phase
- Al₂O₃
- 99.81%
- Mohs hardness
- 9.0
- True density
- 3.90 g/cm³
- Melting point
- 2250 °C
Precision abrasives,fused from the furnace up
Qianyi Abrasive Materials has fused, milled and classified ultra-fine abrasive powders in the Zhengzhou Superhard Materials Industrial Park since 2012. White fused alumina, green silicon carbide, tabular alumina and brown fused alumina — 20,000 tonnes a year, graded to the standard your process already runs on.
2012Founded in the Zhengzhou superhard materials park
20,000t/yrAbrasive materials shipped annually
4familiesWFA · GC · PWA · BFA product lines
99.8% Al₂O₃Typical white fused alumina purity
Material familiesFour abrasive families,
Four abrasive families,
one process discipline
Each family is fused or reacted from its own raw material route, then taken through the same shaping, separation and classification discipline. Open any material for its full chemistry, physical properties and application list.
GC
Green Silicon Carbide
Wafer slicing · GC800# – GC10000#
- SiC
- ≥99.0%
- Mohs hardness
- 9.5
- Density
- 3.20–3.25 g/cm³
- Grades
- GC800#–GC10000#
PWA
Tabular Alumina
Scratch-free CMP · hexagonal platelets
- Al₂O₃
- 99.72%
- Mohs hardness
- 9
- Passes saved
- 10–20%
- Yield gain
- 10–15%
BFA
Brown Fused Alumina
Tough workhorse · F4 – F320
- Al₂O₃
- 95.0–97.0%
- Microhardness
- HV 1800–2200
- Grit range
- F4 – F320
- Toughness
- Higher than SiC
Capacity
20,000 tonnes a year, fully in-house
Multiple production lines in the Zhengzhou Superhard Materials Industrial Park, a full set of testing equipment and a strict quality control process under a certified ISO 9001 system. Custom sizes and grades are produced to customer specification.
Since 2018
Platelets that slide, not roll
Conventional abrasives are equiaxed or spherical, so they roll and randomly scratch. Tabular alumina grows as flat hexagonal platelets that lie parallel to the workpiece, producing a sliding cut with pressure spread across the whole face.
Less grain fracture means far better wear resistance, the best available material removal rate and surface finish, and — in test data — at least 10–20% fewer lapping and polishing passes. On semiconductor wafers, yield generally holds above 96%.
Why Qianyi
Control at every step
Fused in-house, not traded
Arc-furnace fusion, tipping, crushing, milling, magnetic separation, acid washing and air classification all happen on our own lines — so grain shape and purity are ours to control.
Three grading standards
Material is produced to EU FEPA, Japanese JIS and American ANSI grading, so an existing specification can usually be matched without requalification.
Electronic-grade chemistry
The white fused alumina line runs at 99.81% Al₂O₃ with Fe₂O₃ held to 0.01% — the level semiconductor and piezoelectric crystal work demands.
Tabular alumina specialists
Producing single-crystal tabular alumina (PWA) since 2018: hexagonal platelets that slide instead of roll, cutting 10–20% of lapping and polishing passes.
Quality
Inspected before it ships
A full set of testing equipment and a strict quality control system sit behind every batch. Company standards are benchmarked against JIS, with particle uniformity comparable to established Japanese and American brands.
ISO 9001 certified system
Production runs under a certified ISO 9001 quality management system, with a full set of testing equipment and a strict quality control process in-house.
Graded to three standard families
Multiple production lines produce material to EU FEPA, Japanese JIS and American ANSI grading, so an existing specification can usually be matched directly.
Particle size and chemistry checks
Particle size distribution and chemical composition are verified batch by batch — the WFA line holds Al₂O₃ at 99.81% with Fe₂O₃ at 0.01%.
Benchmarked against JIS grades
Company standards are set against JIS. Proprietary process control gives more uniform particle size, comparable to well-known Japanese and American brands.
Custom grades to specification
Any listed material can be produced to a customer-specified size or grade rather than only the standard catalogue bands.
Traceable despatch
Material is packed in bulk bags and cartons with batch identity retained through to shipping, supported by goods and technology import/export rights.
The plant
From furnace to warehouse
Next step
Tell us the grade, grit and volume you need
Send your target application, grading standard, particle size band and monthly volume. We produce to FEPA, JIS and ANSI grading and can develop custom grades to specification.
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