Tellurium and selenium halide-based glasses, their preparation and use
US5352639A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1993 |
| Grant date | Oct 4, 1994 |
| Priority date | — |
| Expiry date | Mar 11, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S501/904
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Vitreous solid compositions of formula I: EQU Te.sub.w Se.sub.y X.sub.x Z.sub.z (I) wherein PA1 X represents at least one halogen selected from chlorine, bromine and iodine, PA1 Z represents at least one element selected from As, Sb and Bi, PA1 w, x, y and z represent the molar percentages respectively of elements Te, X, Se and Z, PA1 w being a number varying from 5 to 50, PA1 x being a number varying from 5 to x.sub.1, PA1 y being a number varying from 5 to 80, PA1 z being a number varying from 5 to z.sub.1, PA1 the numbers w, x, y and z being such that the sum (w+x+y+z) is equal to 100, PA1 the numbers x.sub.1 and z.sub.1 being such that: PA1 when X represents mostly iodine, x.sub.1 =50 and z.sub.1 =60, PA1 when X represents mostly bromine, x.sub.1 =60 and z.sub.1 =50, and PA1 when X represents mostly chlorine, x.sub.1 =60 and z.sub.1 =40, PA1 it being understood that the molar percentage of Bi, when it is present, is not greater than 12 and that the molar percentage of the element Sb, when it is present, is not greater than 20; their preparation and their use principally in the field of infrared transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.