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Ceramic abrasive grain

  • Sol-gel aluminum oxide for abrasive wheels
  • Sol-gel aluminum oxide for abrasive wheels
  • Sol-gel aluminum oxide for abrasive wheels
Sol-gel aluminum oxide for abrasive wheels Sol-gel aluminum oxide for abrasive wheels Sol-gel aluminum oxide for abrasive wheels

Sol-gel aluminum oxide for abrasive wheels

Sol-gel aluminum oxide for abrasive wheels

 

Introduction of Sol-gel aluminum oxide for abrasive wheels

Ceramic Alumina abrasive grain is featured for its extream tiny crystal size and durability.It is also be called SG abrasive grain or ceramic alumina. Ceramic alumina grain is made by a sol-gel method instead of fusing process. The main structure of ceramic alumina grain isα-Al2O3. White color and blue color sol-gel alumina grains are made from different seeded formulas. The white one is of higher aluminum oxide purity. And white color is more suitable for vitrified boned abrasive wheels.

 

The features of Sol-gel aluminum oxide for abrasive wheels

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 properties of Sol-gel aluminum oxide for abrasive wheels

 

Product Name

SG Ceramic Alumina Abrasive

Method

Sol-Gel

True Density 

3.90 g/cm³

Hv Hardness

2100-2200(khf/mm³)

GPa hardness

21-21.5Gpa

Color

White

Crystal size

100-150nm

Roughness

65%

 

Chemical composition of Sol-gel aluminum oxide for abrasive wheels

AL2O3

Min. 99.4%

TiO2

Max. 0.2%

SiO2

Max. 0.08%

Fe2O3

Max. 0.02%

Na2O

Max. 0.1%

 

Applications of Sol-gel aluminum oxide for abrasive wheels

Sol-gel alumina abrasive grain always mixed with other abrasive grains to make abrasive tools.

1. Diamond cutting wheel.

2. Diamond vitrified 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.

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The bulk density of Sol-gel aluminum oxide for abrasive wheels

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