C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
C03C 3/087 (2006.01) C03C 3/078 (2006.01)
Patent
CA 2458000
A method is provided for adjusting, e.g., lowering, the melting and/or forming and/or liquidus temperatures of a glass composition which can be accomplished without substantially changing the bending and annealing temperatures of the glass composition. The method includes decreasing the amount of MgO in the glass composition and increasing the amount of two or more or all of CaO, R2O (Na2O and K2O), Al2O3 and SiO2 by the same or about the same amount.
L'invention concerne un procédé permettant d'ajuster, par exemple, d'abaisser la fusion et/ou la formation et/ou les températures dites <= Liquidus >= d'une composition de verre, ledit procédé pouvant être réalisé sans pratiquement modifier les températures de bombage et de recuisson de ladite composition. Ce procédé consiste à diminuer la quantité de MgO dans la composition de verre et à augmenter la quantité d'au moins deux composés parmi CaO, R¿2?O (Na¿2?O and K¿2?O), Al¿2?O¿3? et SiO¿2 ?ou de tous ces composés de la même quantité ou d'environ la même quantité.
Markovic Richard
Pecoraro George A.
Ratliff Jerry C.
Borden Ladner Gervais Llp
Ppg Industries Ohio Inc.
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