Silica-free tungsten bronze glass ceramics and methods of making the same
AssigneeCorning Incorporated
InventorJesse Kohl
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Abstract
A glass-ceramic that includes: 5 mol %≤Al2O3≤40 mol %; 30 mol %≤B2O3≤60 mol %; 10 mol %≤WO3≤50 mol %; 0 mol %≤SnO2≤5 mol %; and 1 mol %≤R2O≤30 mol %, wherein R2O is one or more of Li2O, Na2O, K2O, Rb2O, and Cs2O. Further, the glass-ceramic can be silica-free and, in some cases, can have a thickness from about 0.05 mm to about 0.5 mm and one or more of: (a) a total transmittance of less than or equal to 4% at ultraviolet (UV) wavelengths below 400 nm and (b) a total transmittance from about 0.5% to about 4% in the near-infrared (NIR) spectrum from 700 nm to 1500 nm.
Claims25
A glass-ceramic, comprising:
- 5 mol %≤Al2O3≤40 mol %;
- 30 mol %≤B2O3≤60 mol %;
- 10 mol %≤WO3≤50 mol %;
- 0 mol %≤SnO2≤5 mol %;
- and
- 1 mol %≤R2O≤30 mol %,
- wherein R2O is at least one of Li2O, Na2O, K2O, Rb2O, or Cs2O.
A glass-ceramic, comprising:
- 7 mol %≤Al2O3≤30 mol %;
- 35 mol %≤B2O3≤55 mol %;
- 15 mol %≤WO3≤40 mol %;
- 0 mol %≤SnO2≤2.5 mol %;
- and
- 5 mol %≤R2O≤25 mol %,
- wherein R2O is at least one of Li2O, Na2O, K2O, Rb2O, or Cs2O.
A method of making a glass-ceramic, comprising:
- mixing a batch comprising:
- 5 mol %≤Al2O3≤40 mol %;
- 30 mol %≤B2O3≤60 mol %;
- 10 mol %≤WO3≤50 mol %;
- 0 mol %≤SnO2≤5 mol %;
- and
- 1 mol %≤R2O≤30 mol %,
- wherein R2O is at least one of Li2O, Na2O, K2O, Rb2O, or Cs2O;
- melting the batch between about 1100° C. and about 1450° C. to form a melt;
- annealing the melt between about 380° C. and about 500° C. to define an annealed melt;
- and
- heat treating the annealed melt between about 500° C. and about 1000° C. from about 5 minutes to about 48 hours to form the glass-ceramic.
Dependencies are inferred from the claim text.