Ceramic Aluminum oxide Abrasive grain F150-F220 from China

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Product Description

Product Description
Ceramic Alumina grain
Ceramic Aluminum oxide Abrasive grain F150-F220 from China
Introduction of Ceramic Aluminum oxide Abrasive grain F150-F220 from China
Sol-Gel Alumina abrasive is a new type abrasive grain totally different from traditional fused alumina. Sol-Gel is also called ceramic alumina grain,it is made by sol-gel process.
α-Al2O3 micro-crystal always added as seed into the raw mixed materials of Al2O3 H2O micropowder and water. By doing so,crystal will get more compact when calcined to get solid sol-gel grains. The calcining and sintering process are very important to make sol-gel crystal get small α-Al2O3 crystal size.
The features of Ceramic Aluminum oxide Abrasive grain F150-F220 from China:
1. Small crystal size about 100-150nm, which is even much smaller than zirconia alumina. And it’s hundredths of the size of normal fused alumina grains.So it will make abrasive wheels increase lifetime by several times than ordinary wheels.
2. Excellent self-sharpening performance. The sol-gel grain will get new grinding edges after grinding. The edges are get from the single grain crystal instead of off a whole crystal. That makes the grain much sharper than normal fused alumina.
3. The microscopic hardness of sol-gel alumina is about 1900-2400 kgs/cm2,which is higher than zirconia alumina. Thus,sol-gel alumina can make grinding and cutting easier for special hard metal such as Nickel chromium alloy and nickel titanium alloy.
4. The roughness is double of normal fused alumina,and even higher than zirconia alumina.
5. Low temperature grinding is another significant property of Sol-gel alumina abrasive grain. That will avoid much heat during grinding and cutting, so it won’t get hurt of workpiece surface.
6. Small size grinding edges and sharp grinding can avoid tiny crackle on workpiece.
Physical propertiesof Ceramic Aluminum oxide Abrasive grain F150-F220 from China:

Product Name	SG Blue Ceramic Alumina Abrasive
Method	Sol-Gel
True Density	≥3.90 g/cm³
Hv Hardness	2100-2200(khf/mm³)
Color	Blue
Crystal size	50-150nm
Roughness	65%

Chemical composition ofSol-gel alumina abrasive grain

AL2O3	94-96%
Y2O3	1-2%
La2O3+NdO2	2-3%

Applications of Sol-gel alumina abrasive grain:
Sol-gel alumina abrasive grain always mixed with other abrasive grains to make abrasive tools.
1. Diamondcuttingwheel.
2. Diamondvitrified gear grinding wheel.
3. High level resin boned grinding wheel.
4. High level vitrified bonded grinding wheel.
5. Centerless grinding wheel.
6. High level cutting disc.
7. High level coated abrasives.
Thebulkdensityof Sol-gelaluminaabrasivegrain：

Grit designation	Mean diameter in um	Bulk Density(g/cm3)
F16	1230	1.76-2.00
F20	1040	1.78-2.02
F22	885	1.78-2.02
F24	745	1.78-2.00
F30	625	1.77-2.00
F36	525	1.79-1.99
F40	438	1.75-1.96
F46	370	1.73-1.93
F54	310	1.76-1.95
F60	260	1.72-1.94
F70	218	1.70-1.92
F80	185	1.67-1.87
F90	154	1.65-1.86
F100	129	1.64-1.84
F120	109	1.63-1.82
F150	82	1.62-1.82
F180	69	1.60-1.80
F220	58	1.58-1.78

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