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THE DEVITRIFICATION OF “PYREX” GLASSES1 |
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| Authors: | George W Morey |
| Affiliation: | Grophysical Laboratory Carnegie Institution of Washington Washington. D. C. |
| Abstract: | A study has been made of the devitrification phenomena of three “Pyrex” glasses, which were found to have liquidus temperatures lower than any other known mixtures containing 50 high a silica content. “Pyrex” glass 774 (702EJ), refractive index 1.471, has a liquidus temperature of 1077°, 772 (702P), index 1.486, 1042° and 776 (720GO), index 1.473, 1036°. In all cases tridymite is the primary phase and cristobalite was never observed. |
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