Cuprous copper and/or silver halophosphate glasses
AssigneeCorning Glass Works
InventorsRoger F. Bartholomew, William G. Dorfeld, James A. Murphy, Joseph E. Pierson, Stanley D. Stookey, Paul A. Tick
Life of this patent
Estimating the term…
Abstract
This invention is related to the production of glasses having compositions within the copper and/or silver-halide-phosphate field, wherein at least one halide is present selected from the group of fluoride, chloride, bromide, and iodide, such glasses exhibiting softening points below about 400.degree. C., coefficients of thermal expansion (25.degree.-300.degree. C.) in excess of about 180.times.10.sup.-7 /.degree.C., high electrical conductivity, and electrochromic behavior. The copper-containing glasses may also demonstrate thermochromic properties.
Claims7
Cuprous copper and/or silver halophosphate glasses having softening points less than about 400.degree. C., coefficients of thermal expansion (25.degree.-300.degree. C.) in excess of about 180 .times.10.sup.-7 /.degree. C., and electrical resistivities when measured at room temperature of less than about 10.sup.8 ohm cm, said glasses consisting essentially of the stated proportions, expressed in terms of weight percent on the oxide basis as calculated from the batch, selected from the groups of:
- (a) compositions defined by area ABCD of FIG. 1;
- (b) compositions defined by area ABCD of FIG. 2;
- (c) compositions defined by area ABCDE of FIG. 3;
- (d) compositions containing at least 1% chloride and defined by area ABCD of FIG. 5;
- (e) compositions containing at least 1% bromide and defined by area ABCD of FIG. 6;
- (f) compositions containing at least 1% iodide and defined by area ABCDE of FIG. 7;
- (g) compositions defined by area ABCDEF of FIG. 8;
- (h) compositions defined by area ABCDEF of FIG. 9;
- (i) compositions defined by area ABCDEF of FIG. 10;
- (j) compositions defined by area ABCDEF of FIG. 11.
Dependencies are inferred from the claim text.