Glass-ceramic and crystalline articles and methods of making same
AssigneeCorning Incorporated
InventorsBrian Daniel Fulmer, Timothy Michael Gross
Life of this patent
Estimating the term…
Abstract
Embodiments of the disclosure relate to glass-ceramic or crystalline article. The article includes 25 mol %≤silica≤60 mol %, 12.5 mol %≤alumina≤45 mol %, and 12.5 mol %≤strontium oxide≤45 mol %. According to certain embodiments, an interior of the article is mostly amorphous glass, and the interior is at least partially surrounded by a shell that is mostly crystalline. The shell defines a first major surface on a first side of the interior and a second major surface opposite to the first major surface on a second side of the interior. According to certain other embodiments, the article is a crystalline article in which columnar crystals grow inwardly from opposing surfaces and meet at about a midline of the article.
Claims22
1-30. (canceled)
A crystalline article, comprising in terms of mole percent (mol %) of constituent oxides:
- 40 mol %≤SiO2≤50 mol %;
- 25 mol %≤Al2O3≤32.5 mol %;
- and
- 22.5 mol %≤SrO≤30 mol %;
- wherein Al2O3≥SrO;
- and
- wherein the crystalline article comprises at least 90 volume percent (vol %) crystalline material;
- and
- wherein the crystalline material comprises at least 90 vol % of a single phase of crystal.
A crystalline article, comprising:
- 40 mol % to 50 mol % SiO2;
- Al2O3;
- and
- SrO;
- wherein 0<Al2O3—SrO≤5 mol %;
- wherein the crystalline article comprises a first major surface, a second major surface, and a thickness, the second major surface being opposite to the first major surface and the thickness being a distance between the first major surface and the second major surface;
- and wherein the thickness is 1 mm or less.
50-60. (canceled)
Dependencies are inferred from the claim text.