초록 ▼

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 Ca

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.

대표청구항 ▼

A highly crystalline glass-ceramic article exhibiting high toughness and a modulus of rupture in excess of 20,000 psi, wherein the predominant crystal phase is potassium fluorrichterite and having an overall composition consisting essentially, expressed in terms of weight percent on the oxide basis,

A highly crystalline glass-ceramic article exhibiting high toughness and a modulus of rupture in excess of 20,000 psi, wherein the predominant crystal phase is potassium fluorrichterite and having an overall composition consisting essentially, expressed in terms of weight percent on the oxide basis, of about SiO2: 50-70 CaO: 4-15 MgO: 8-25 F: 3-8 Na2O: 2-9 K2O: 2-12 Li2O: 0-3 Al2O3: 0-7.