THE CRYSTALLIZATION AND OPTICAL-PROPERTIES OF GALLIUM CERIUM LANTHANUM SULFIDE GLASS

A series of gallium lanthanum sulphide glasses (70Ga2S3-30La2S3) were melted with cerium sulphide contents ranging from 0 to 15 mol%, i.e. u p to half of the lanthanide sulphide content. The stability of these g lasses was investigated using thermal analysis and x-ray diffraction. Replacement of half of the lanthanum sulphide content was found to imp rove the stability against devitrification on heating by a 19% expansi on of the working range. Glasses with and without cerium were doped wi th 3 mol% neodymium sulphide and the optical properties examined. Ceri um sulphide addition appeared to result in energy transfer to the neod ymium, enhancing the lower energy fluorescence.