Name: Lapping powder WA
Brand: ROHz
SKU: PWA
Availability: InStock
Rating: 5 (1 reviews)

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Description

WA is a product with a wide variety of application and typically used in smooth and fine surface preparation.
It is produced by crushing fused alumina into powder form and then sorting the particles into a uniform size.
It has an α-type crystal transformation with high purity alumina Al2O3 composition, at least 99.0%.
The Mohs hardness is next to that of silicon carbide. With highly controlled particle size distribution and consistent particle shape,it is highly recommended to be used for high level surface preparation, precise and final lapping and polishing of materials such as Metals, Quartz Crystal Blanks, Optical Devices and Semiconductor Wafers.

Basic materials characteristics

Type of product	Particle size code	Chemical composition (%)
Type of product	Particle size code	Al2O3	SiO2	Fe2O3	TiO2	Na2O
WA	240#~4000#	≧99.90	......	......	......	≦0.10
WA	6000#~12000#	≧99.00	≦0.50	≦0.10	......	≦0.30

Particle Distribution (μm)
Particle size code	Particle size range (μm)	Particle size at 50% point D50 (μm)
240#	70～100	85.±15.0
280#	55～75	65.±10.0
320#	50～60	55.0±5.0
360#	42～54	36.0±9.0
400#	29～45	37.0±8.0
500#	23～37	30.0±7.0
600#	20～32	26.0±6.0
800#	16～25	21.0±4.0
1000#	10～22	18.0±4.0
1200#	8.0～17	14.0±3.0
1500#	6.0～14	11.5±2.5
2000#	5.0～9.5	8.5±1.0
2500#	4.0～7.5	7.0±0.7
3000#	3.0～6.0	5.7±0.5
4000#	2.5～4.7	3.5±1.2
6000#	1.8～3.0	2.4±0.6
8000#	0.7～2.3	1.5±0.8
10000#	0.2～0.8	0.5±0.3
12000#	0.0～0.5	0.2±0.2

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