Rise Optoelectronics (Hangzhou) Co.,Ltd.

Lapping powder WA

Item No.: PWA
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%.
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 (%)
Al2O3 SiO2 Fe2O3 TiO2 Na2O
WA 240#~4000# 99.90 ...... ...... ...... 0.10
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# 70100 85.±15.0
  280# 5575 65.±10.0
  320# 5060 55.0±5.0
  360# 4254 36.0±9.0
  400# 2945 37.0±8.0
  500# 2337 30.0±7.0
  600# 2032 26.0±6.0
  800# 1625 21.0±4.0
  1000# 1022 18.0±4.0
  1200# 8.017 14.0±3.0
  1500# 6.014 11.5±2.5
  2000# 5.09.5 8.5±1.0
  2500# 4.07.5 7.0±0.7
  3000# 3.06.0 5.7±0.5
  4000# 2.54.7 3.5±1.2
  6000# 1.83.0 2.4±0.6
  8000# 0.72.3 1.5±0.8
  10000# 0.20.8 0.5±0.3
  12000# 0.00.5 0.2±0.2

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