Alkali metal, copper phosphate glasses

摘要: This invention is directed to the production of glasses exhibiting transition temperatures below 375° C., preferably 350° and superior resistance attack by boiling water. The contain at least 10% copper, as expressed in terms CuO, predominant proportion copper being present Cu +2 oxidation state. consist essentially, mole percent, ______________________________________ Li 2 O 0-15 MgO B 3 0-5Na 0-20 CaO ZnO 0-37K 0-10 SrO Sb 0-36Tl BaO CeO 0-3Li + Na 12-30 0-25 MoO 0-7K Tl BaOCuO 10-50 Al 0-5 RE 0-2P 5 28-36 WO 0-7MnO 0-20______________________________________ wherein two alkali metal oxides are up 12% weight fluoride may optionally be present.