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Pink Fused Alumina (PA)

Pink fused alumina is also called pink aluminium oxide.


Pink fused alumina (PA) is produced by bayer alumina and right quantity oxidized chromium in an electric arc furnace at high temperatures. Compared with white aluminium oxide, the product shows similar hardness and lower toughness. The abrasive tools which made of PA have excellent durability and high processing cleanness. The materials are used to grind measuring and cutting tools, instruments, threading workpieces, etc. which demand low roughness on the surface.  


Physical Characteristics
Item Basic mineral Crystal system Crystal color Mohs hardness Density
Pink fused alumina Hexagonal Pink 9 ≥3.90g/cm3
Item Micro hardness Electrical resistivity Grinding ability (compared with diamond as one) Linear expansion coefficient (when 900℃ α•10-6k-1)
Pink fused alumina HV2200-2300 1014-1016Ω•cm 0.12 8.3


Chemical Composition
Grit Low chromium Medium chromium High chromium
Al2O3 Cr2O3 Na2O Al2O3 Cr2O3 Na2O Al2O3 Cr2O3 Na2O
F12-F80 ≥98.50 0.20-0.45 ≤0.50 ≥98.20 0.45-1.00 ≤0.55 ≥97.40 1.00-2.00 ≤0.50
F90-F150 ≥98.50 ≤0.55 ≥98.20 ≤0.60 ≥97.00 ≤0.60
F180-F220 ≥98.00 ≤0.60 ≥97.80 ≤0.70 ≥96.50 ≤0.70
Note: Special requirement on chemical composition can be satisfied through discussion.


Optional Particle Sizes
Product Category Particle Size
PA - low chromium F12-F220, F240-F2000, P12-P220, JIS240#-10000# etc.
PA - medium chromium F12-F220, F240-F2000, P12-P220, JIS240#-10000# etc.
PA - high chromium F12-F220, etc.
Note: Special specification can be customized according to customer's requirements.

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