Chrome corundum
Chromium corundum is made of alumina as the main raw material, suitable for chromium oxide, etc.
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Chrome corundum
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Chrome corundum
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Chromium corundum is made of alumina as the main raw material, suitable for chromium oxide, etc. It is smelted at high temperature. It is pink, similar in hardness to white corundum, and has higher toughness than white corundum. Abrasives made with it have good durability and high grinding finish. It is suitable for precision grinding of measuring tools, machine tool spindles, instrument parts, threaded workpieces and sample grinding.
Chemical composition:
|
chrome corundum |
Low chromium |
Medium chromium |
High chromium |
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|
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 |
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|
F180-F220 |
≥98.50 |
≤0.50 |
≥98.80 |
≤0.70 |
≥96.50 |
≤0.70 |
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Physical property
|
Basic minerals |
Crystal size |
True density |
Bulk density |
Knoop hardness |
|
α-Al2O3 |
600-2000 |
≥3.90 |
1.40-1.91 |
2200-2300 |
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