Process for Melting Multi Component Oxyfluoride Glasses
Original Publication Date: 1980-May-01
Included in the Prior Art Database: 2005-Feb-13
An easily controllable process is provided for melting multi-component oxyfluoride glasses having hygroscopic compounds in their batch compositions. It is basically a two-step procedure consisting of: a first step which includes the fluorination of part of the fluoride portion of the batch and melting thereafter to form a fluoride mixture or fluoride glass, and a second step consisting of melting the batch composed of multi-component fluoride mixture and oxides to form an oxyfluoride glass. Specific glasses are formed using the process. Certain oxyfluoride glasses, such as fluorophosphate glasses, have previously been developed as a promising host for Nd+++ to make glass lasers in nuclear fusion research. The fluorophosphates also are promising host systems for other rare earths to make glassy phosphors.