High refractive index glass composition
US9156729B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2011 |
| Grant date | Oct 13, 2015 |
| Priority date | — |
| Expiry date | Jul 6, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C3/068
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A glass composition including SiO2 in an amount from 30.0 to 40.0% by weight, Al2O3 in an amount from 15.0 to 23.0% by weight, B2O3 in an amount from 0.0 to 15.0% by weight, K2O in an amount from 0.0 to 5.0% by weight, La2O3 in an amount from 0.0 to 30.0% by weight, Li2O in an amount from 0.0 to 3.0% by weight, Na2O in an amount from 0.0 to 4.0% by weight, Nb2O5 in an amount from 0.0 to 10.0% by weight, TiO2 in an amount from 0.0 to 7.5% by weight, WO3 in an amount from 0.0 to 10.0% by weight, Y2O3 in an amount from 15.0 to 35.0% by weight, and RO (one or more of MgO, CaO, SrO, and BaO) in an amount from 0.0 to 7.5% by weight is provided. Glass fibers formed from the composition have a refractive index between 1.55 and 1.69.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.