Enhanced ion exchange methods
AssigneeCorning Incorporated
InventorsQiao Li, Santona Pal
Life of this patent
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Abstract
Methods of manufacturing a glass-based article include exposing a glass-based substrate to a molten salt bath including a first salt and a second salt. In aspects, the first salt includes a metal ion that has a larger ionic radii than an alkali metal of the glass-based substrate and a first anion, and the second salt dissolved in the molten salt bath includes the same metal ion as the first salt and a second anion different from the first anion. In aspects, the first salt is potassium nitrate, the second salt is potassium carbonate, and a concentration of the potassium carbonate remains at or below its solubility limit in the molten salt bath.
Claims19
A method of manufacturing a glass-based article comprising:
- exposing a glass-based substrate to a molten salt bath to form the glass-based article, wherein the glass-based substrate contains an alkali metal oxide, the glass-based substrate has opposing first and second surfaces defining a substrate thickness (t), and the molten salt bath comprises:
- a first salt including a metal ion that has a larger ionic radii than an alkali metal of the alkali metal oxide and a first anion;
- and
- a second salt that is dissolved in the molten salt bath and includes the same metal ion as the first salt and a second anion different from the first anion of the first salt,
- wherein:
- a concentration of the second salt remains at or below its solubility limit in the molten salt bath;
- and
- the molten salt bath comprises poisoning ions and a concentration of the poisoning ions is at or below their solubility limit in the molten salt bath.
A method of manufacturing a glass-based article comprising:
- exposing a glass-based substrate to a molten salt bath to form the glass-based article, wherein the glass-based substrate contains lithium, the glass-based substrate has opposing first and second surfaces defining a substrate thickness (t), and the molten salt bath comprises:
- potassium nitrate (KNO3);
- and
- potassium carbonate (K2CO3) that is dissolved in the molten salt bath,
- wherein a concentration of the K2CO3 remains at or below its solubility limit in the molten salt bath, and a concentration of lithium ions in the molten salt bath remains at or below their solubility limit in the molten salt bath.
Dependencies are inferred from the claim text.