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Ø   Feature

White fused alumina WA is the finest fine powder particles crushed and sized by advanced fine powder technology using white alumina abrasive as raw material. And the stable particle shape enables sharp particle size distribution.

 

Ø   Physical Properties and Chemical Composition

l   Raw Materialhigh-purity alumina melted in an electric furnace

l   Chemical Nameα-alumina (fused alumina)

l   Structurewhite corundum crystal

l   Melting Point2050°C

l   HardnessMohs 12

 

Ø   Application

l   Materials for precision grinding wheels (bearing stell, etc,) and high-classed polishing grinding wheels

l   Materials for polishing cloth and abrasive tape

l   High-grade fillers for paints, resins and plywood

l   Various lapping materials for metal, glass, crystal, semiconductor crystal, etc.

l   Electrical insulation materials, high-grade refractory materials

l   Other

 

Ø   Specification

 

Particle

Specific gravity

Chemical composition (%)

Al2O3

SiO2

Fe2O3

Na2O

#240~#3000

≥3.90

≥99.0

≤0.3

≤0.1

≤0.5

#4000

≥3.85

≥98.0

≤0.5

≤0.2

≤0.7

#6000

≥3.85

≥97.0

≤1.0

≤0.2

≤0.7

#8000

≥3.85

≥96.0

≤1.5

≤0.3

≤0.7

 

Particle

Particle size distribution (µm)

Maximum size

D3

D50

D94

#240

≤127

≤103

57.0±3.0

≥40

#280

≤112

≤87

48.0±3.0

≥33

#320

≤98

≤74

40.0±2.5

≥27

#360

≤86

≤66

35.0±2.0

≥23

#400

≤75

≤58

30.0±2.0

≥20

#500

≤63

≤50

25.0±2.0

≥16

#600

≤53

≤43

20.0±1.5

≥13

#700

≤45

≤37

17.0±1.3

≥11

#800

≤38

≤31

14.0±1.0

≥9

#1000

≤32

≤27

11.5±1.0

≥7

#1200

≤27

≤23

9.5±0.8

≥5.5

#1500

≤23

≤20

8.0±0.6

≥4.5

#2000

≤19

≤17

6.7±0.6

≥4

#2500

≤16

≤14

5.5±0.5

≥3

#3000

≤13

≤11

4.0±0.5

≥2

#4000

≤11

≤8

3.0±0.4

≥1.3

#6000

≤8

≤5

2.0±0.4

≥0.8

#8000

≤6

≤3.5

1.2±0.3

D75: ≥0.6

 *The above specifications may be updated, please contact us.