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Pink alumina PA abrasives

PA abrasives is bayer alumina,which is electrically fused in high temperature,being added with the right quantity of oxidized chromium. lt is pink.lts hardness is close to,but toughness higher than that or WA.

/MT

PA abrasives:

PA abrasives is bayer alumina,which is electrically fused in high temperature,being added with the right quantity of oxidized chromium. lt is pink.lts hardness is close to,but toughness higher than that or WA.

Chemical composition:

 

Specification

       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 ≤0.55
F90-F150 ≥98.50

≤0.50 ≥98.20

≤0.60 ≥97.00

≤0.60
F180-F220 ≥98.50

≤0.50 ≥98.80

≤0.70 ≥96.50

≤0.70

Physical property:

Basic minerals Crystal size

μm

True density

g/cm3

Bulk density

g/ cm3

Knoop hardness

kg/mm2

α-Al2O3 600-2000 ≥3.90 1.40-1.91 2200-2300

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