发明授权

R.sub.2 O-Al.sub.2 O.sub.3 /B.sub.2 O.sub.3 -P.sub.2 O.sub.5 glasses
摘要:
This invention relates to the preparation of glasses exhibiting low transition temperatures with excellent chemical durability. The glasses consist essentially, in mole %, of:______________________________________ P.sub.2 O.sub.5 44-58 Al.sub.2 O.sub.3 + 4-10 Na.sub.2 O + Li.sub.2 O 10-45 B.sub.2 O.sub.3 Al.sub.2 O.sub.3 0-7 Na.sub.2 O 10-30 Cu.sub.2 O 0-20 B.sub.2 O.sub.3 0-10 Li.sub.2 O 0-30 Li.sub.2 O + Cu.sub.2 O 10-30 ______________________________________
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