Potassium fluorrichterite glass-ceramics and method

Details Potassium fluorrichterite glass-ceramics and method Potassium fluorrichterite glass-ceramics and method

C - Chemistry, Metallurgy

03

C

261/16, 49/77

C03C 10/08 (2006.01) C03C 10/16 (2006.01)

Patent

CA 1204455

Abstract of the Disclosure There is disclosed a highly crystalline glass- ceramic article exhibiting superior toughness against fracture propagation, a modulus of rupture in excess of 20,000 psi, a predominant crystal phase of potassium fluorrichterite, and having an overall composition consisting essentially of SiO2 50-70 CaO 4-15 MgO 8-25 F 3-8 Na2O 2-9 K2O 2-12 Li2O 0-3 Al2O3 0-7 Canasite may be a secondary phase, but a crystal phase composed essentially of potassium fluorrichterite is preferred for dinnerware.

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