Evonik SIPERNAT® 268 Ceramic Powder

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Evonik SIPERNAT® 268 Ceramic Powder
Categories:	Other Engineering Material
Material Notes:	SIPERNAT represents a specific product range of precipitated silica, aluminum and calcium silicates. SIPERNAT 268 is highly suitable for rubber applications, especially Silicone Rubber e.g. HTV Silicon Rubber. Careful adjustments of parameters such as surface area, particle size, oil absorption capacity and purity (conductivity) result in a product with different properties. SIPERNAT 268 is a fine milled silica with neutral pH value, with relatively high surface area, medium particle size and a very high purity based on selected raw materials. When using SIPERNAT 268, semi-transparent Silicon Rubber products with excellent mechanical properties and low yellowish discoloration can be achieved. Information provided by Evonik
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Physical Properties	Original Value	Comments

Density	0.0850 g/cc	Tamped; ISO 787-11
Particle Size	12 µm	d50; ISO 13320-1
pH	6.4	5% in water; ISO 787-9
Specific Surface Area	185 m²/g	ISO 9277

Component Elements Properties	Original Value	Comments
Loss on Ignition(%)	<= 5.5 % @Temperature 1000 °C, Time 7200 sec	ISO 3262-1
SiO2	>= 97 %	ISO 3262-19
Sodium, Na	<= 0.50 %

Descriptive Properties
Content	<0.25%	Sulfate
	<400 ppm	Iron

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PEVONIM071 / 197275

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