Porcelain coating compositions for low expansion porcelain...

Details Porcelain coating compositions for low expansion porcelain... Porcelain coating compositions for low expansion porcelain...

C - Chemistry, Metallurgy

03

C

C03C 3/076 (2006.01) A61K 6/06 (2006.01) C03C 3/089 (2006.01) C04B 33/24 (2006.01) C04B 35/622 (2006.01)

Patent

CA 2183127

An all-ceramic dental restoration comprising a ceramic core over and at least one coating thereon of a porcelain composition having a maturing temperature of from about 850° to about 1050°C. and a coefficient of thermal expansion of from about 4.0 to about 13 (room temperature to 500° C.) parts per million per ° C. comprising: Component Amount (Wt. %) SiO2 69 - 75 Al2O3 4.0 - 9.5 Na2O 5 - 10 K2O 0 - 4 CaO 0 - 1.5 MgO 0 - 6 B2O3 6 - 15 F 0-3

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