Spontaneously-formed machinable glass-ceramics
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United States of America Patent
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Aug 20, 1985
Grant Date -
N/A
app pub date -
Oct 24, 1983
filing date -
Oct 24, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention is related to the production of machinable glass-ceramic articles which are essentially free from crystals having a mica structure and consist essentially, in weight percent, of SiO.sub.2 : 24-28 Al.sub.2 O.sub.3 : 9-20 MgO: 12-28 SrO: 0-11 BaO: 0-14 CuO: 0-5 Ag.sub.2 O: 0-3.5 NiO: 0-1.5 Cr.sub.2 O.sub.3 : 0.5-6.5 F: 2-9
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