Oxynitride glass and the fiber thereof
US4957883A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1989 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Mar 6, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C3/111
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An oxynitride glass, a process for preparing same and a fiber thereof, in the glass which has Si--M.sub.1 --M.sub.2 --O--N system and contains SiO.sub.2, Si.sub.3 N.sub.4 and M.sub.1 O in amounts which, as mole %, satisfy the following equations (a) and (b): EQU (SiO.sub.2 +3Si.sub.3 N.sub.4 +M.sub.1 O) X 100 / (100+2Si.sub.3 N.sub.4)=65 to less than 100 (a) EQU (SiO.sub.2 +3Si.sub.3 N.sub.4)/M.sub.1 O=0.7 to 2.3 (b) wherein M.sub.1 is Ca, or Ca and Mg; M.sub.2 is at least one of the metal selected from the group consisting of Al, Sr, La, Ba, Y, Ti, Zr, Ce, Na, K, Sb, B, Cr, Pb, V and Sn, said glass containing 0-40 mole% SiO.sub.2, 26-70 mole % CaO, 0-20 mole % MgO, and over O to not more than 22 at % M.sub.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.