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| Silica
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Product
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Silica
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Items
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Types
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HS-115
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HS-145
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HS-160
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HS-175
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HS-195
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Apperance
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-
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White powder
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White powder
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White powder
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White powder
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White powder
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Assay（ Calculated as SiO2 dry product）
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％
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≧
90
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≧
93
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≧
96
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≧
97
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≧
98
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45 μ m screen
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%
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≦0.5
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≦0.5
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≦0.5
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≦0.5
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≦0.5
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PH
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5.5-7.5
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5.5-7.5
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5.5-7.5
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5.5-7.5
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5.5-7.5
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Ignition Loss（800±25℃×2h,dry product）
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％
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≦
7
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≦
7
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≦
7
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≦
7
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≦
7
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Moisture 105±5℃×1h）
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％
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4-8
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4-8
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4-8
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4-8
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4-8
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DBP
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cm3/g
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2-2.3
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2.3-2.5
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2.4-2.6
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2.4-2.7
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2.4-3.0
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Specific Surface Area
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m2/g
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120-150
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130-170
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140-180
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150-200
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170-220
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Water soluble salts
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％
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≦2.5
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≦2.5
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≦2.5
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≦2.5
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≦2.5
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Elongation at break（150℃×15‘）
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％
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≧550
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≧550
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≧550
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≧550
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≧550
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300%Elongation strength（150℃×15‘）
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MPa
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≧5.5
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≧5.5
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≧5.5
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≧5.5
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≧5.5
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tensile strength（150℃×15‘）
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MPa
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≧19
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≧19
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≧19
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≧19
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≧19
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