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²»·´Ó¦°É£¬ÀíÂÛÉÏûÕâ¸ö¿ÉÄܰ¡ ÎÒûÊÔ¹ý ÄúΪʲôÕâôÓÃÄØ LUDOX® HS-40 contains synthetic amorphous silica of nominal 12 nanometer particle size. The alkaline aqueous colloidal dispersion contains 40% silica. Product Specifications Property Unit Specification Test Method Specific Gravity @ 60¡ãF 1.292 ¨C1.312 L6550.310.02.EC Silicon Dioxide %SiO2 39.0 ¨C 41.0 L6550.083.01.EC pH @25¡ãC/77¡ãF 9.2 ¨C 9.9 L6550.280.01.EC Ratio SiO2/Na2O 89 ¨C 101 L6550.043.01.EC % Transmission % 52 Min P5900.523.01.EC Viscosity @ 25¡ãC cPs 45 Max L6550.545.01.EC Sulfate %Na2SO4 0.08 Max L6550.277.01.EC Surface Area m2/g 198 ¨C 258 L6550.005.02.EC Alkalinity %Na2O 0.39 ¨C 0.46 L6550.005.01.EC The following Typical Properties data are given for informational purposes only, and are not to be interpreted as product or in-process specifications. Typical Properties Property Unit Typical Value Density kg/L, lb/gal 1.3, 10.8 Boiling Point @760mm Hg ¡ãC/¡ãF 100/212 Melting Point ¡ãC/¡ãF 0/32 Vapor Pressure @25¡ãC/77¡ãF mm Hg 24 @ 38¡ãC/100¡ãF mm Hg 48 Stabilizing Counter Ion Sodium Particle Charge Negative Biocide ppm 240 Recommended Applications LUDOX® HS-40 colloidal silica is broadly used in the formulation of coatings, catalysts, antislips and antisoil treatments as well as a high temperature binder for refractory fibers, investment castings, etc. Key features are: • High binding strength and stability in most applications • Highest silica content for this particle size |
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