LAS-type float glass
AssigneeNippon Electric Glass Co., Ltd.
InventorsHideo Yamauchi, Tomohiro Nagakane
Life of this patent
Estimating the term…
Abstract
An LAS-type float glass, which is substantially free of As2O3 and/or Sb2O3 and precipitates a β-quartz solid solution or a β-spodumene solid solution as a main crystal by heat treatment, wherein, when C1 [mass %] represents the content of SnO2 at a glass surface, C0 [mass %] represents the content of SnO2 at a depth of 0.5 mm from the glass surface, and k [mass %/mm] represents an SnO2 concentration gradient defined by k=(C1-C0)/0.5, the LAS-type crystallized glass satisfies relationships of K≦2 and C0≦0.8 with respect to at least one surface thereof.
Claims4
A LAS-type crystallized glass, which is formed by crystallizing a LAS-type float glass which is substantially free of As2O3 and/or Sb2O3 and precipitates a β-quartz solid solution or a β-spodumene solid solution as a main crystal by heat treatment, wherein,
- when C1 [mass %] represents a content of SnO2 at a glass surface, C0 [mass %] represents a content of SnO2 at a depth of 0.5 mm from the glass surface, and k [mass %/mm] represents an SnO2 concentration gradient defined by k=(C1-C0)/0.5, the LAS-type float glass satisfies relationships of 0.01≦k≦2 and C0≦0.8 with respect to at least one surface thereof.
A LAS-type crystallized glass, which is formed by crystallizing a LAS-type float glass, wherein the LAS-type crystallized glass is substantially free of As2O3 and/or Sb2O3, and comprises a β-quartz solid solution or a β-spodumene solid solution as a main crystal, wherein,
- when C1 [mass %] represents a content of SnO2 at a glass surface, C0 [mass %] represents a content of SnO2 at a depth of 0.5 mm from the glass surface, and k [mass %/mm] represents an SnO2 concentration gradient defined by k=(C1-C0)/0.5, the LAS-type crystallized glass satisfies relationships of 0.01≦k≦2 and C0≦0.8 with respect to at least one surface thereof.
Dependencies are inferred from the claim text.