White Fused Alumina
Mirror polishing · >99% α-phase
Al₂O₃ 99.81% · Mohs hardness 9.0
PWA
Tabular Alumina
Imported industrial alumina powder grown under controlled high temperature so grains develop in one direction into flat hexagonal platelets. The platelets lie parallel to the workpiece and slide instead of rolling, so they cut fast without random scratching.
Al₂O₃ 99.72%Mohs hardness 9Passes saved 10–20%Yield gain 10–15%
Specification
Chemistry and physical properties
Typical production values. Batch certificates are issued against your own specification on request.
| Constituent | Value (%) |
|---|---|
| Al₂O₃ | 99.72 |
| SiO₂ | 0.08 |
| Na₂O | 0.05 |
| Fe₂O₃ | 0.02 |
| Form | Range |
|---|---|
| Supply form | Lapping and polishing micropowder, custom grades on request |
| Property | Value |
|---|---|
| Particle shape | Regular hexagonal platelet (tabular) |
| Appearance | Near-transparent, colourless, smooth flat faces |
| Mohs hardness | 9 |
| Aspect ratio | Nano-scale thickness, micron-scale diameter |
| Dual effect | Combines nano and micron powder behaviour |
| Surface activity | Moderate — bonds well, resists agglomeration |
| Other | High melting point, mechanical strength, wear, oxidation and heat resistance |
Applications
Where PWA is used
- Polishing powder for high-precision microelectronic materials
- Lapping and polishing monocrystalline silicon wafers, piezoelectric quartz crystals and compound semiconductors (GaAs, InP)
- CRT glass bulbs and screens, crystal, quartz glass, hard glass and optical glass
- LCD glass substrates and precision ceramic materials
- High-grade bearing balls, liners and sapphire
- Filler to raise polymer thermal conductivity
- Toughening agent for ceramic fracture resistance
- Pearlescent pigment substrate and cosmetics additive
Gallery
Tabular Alumina in production
Also available
Other material families
Green Silicon Carbide
Wafer slicing · GC800# – GC10000#
SiC ≥99.0% · Mohs hardness 9.5
Brown Fused Alumina
Tough workhorse · F4 – F320
Al₂O₃ 95.0–97.0% · Microhardness HV 1800–2200
Next step
Quote Tabular Alumina to your specification
Tell us the grading standard, particle size band, chemistry limits and monthly tonnage for your PWA requirement and we will confirm the closest grade or quote a custom one.
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