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Polishing suspension based on the silica dioxide
It is meant for a
finishing polish of optic and electronic products. In particular, it is used
at the stage of finishing polish of silicon mono-crystal plates.
It is an ultra-disperse colloid system based on silicon dioxide. It is a liquid of the co lour
of the milk without any visible mechanical inclusions.
It possesses a polishing capability for optic
and electronic products at a normal speed of a material lift.
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Admixture
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Type of suspension
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SPS - 55
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SPS - 53
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SPS - 8
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SPS - 81
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SPS - 54
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Iron
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0,0002
|
0,0002
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0,0002
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0,00002
|
0,0003
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Sodium
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0,4
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0,4
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0,0005
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0,00005
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0,0004
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Potassium
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0,00005
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0,00005
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0,0004
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0,00004
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0,00004
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Stabilizing base
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NaOH, KOH
|
NaOH, KOH
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Ethylendiamin
|
Ethylendiamin
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-
|
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Density, g/cm3
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1,130-1,134
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1,060-1,065
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1,075-1,080
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1,10-1,12
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1,10-1,12
|
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рН at 200С
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9,5-10,9
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9,5-10,9
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11,8-12,0
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12,5-12,8
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5,5-7,0
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Size of particles of SiO2, nm
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50-100
|
10-40
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10-40
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50-100
|
50-100
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Content of
SiO2, mass %
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20,0
|
10,0
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12,5
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20,0
|
16,0
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Appearance of suspension
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Milk color liquid
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Milk color liquid
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Milk color liquid
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Milk color liquid
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Milk color liquid
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Viscosity, MPas
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1,8
|
1,25
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1,25
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1,7
|
1,7
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Stage of usage
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II stage
|
II stage
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I stage
|
I stage
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-
|
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Recommended dilution
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1:10
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1:5
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1:3
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1:5
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|
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рН after dilution
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10,5-10,6
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10,5-10,6
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11,8-11,9
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12,2-12,3
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-
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Density after dilution, g/cm3
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1,010
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1,010
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1,015
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1,010
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-
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Recommended type of polishing
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segal or polyvel
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segal
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polytan
|
polytan
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segal, polyvel, polytan and e.a.
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Serviceable life, months, at
least
|
6
|
6
|
6
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6
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6
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