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Updated: Jan 2, 2026

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Further Studies in the Annealing of a Borosilicate Glass
Sam Spinner1, Albert Napolitano1
1Institute for Materials Research, National Bureau of Standards, Washington, D.C.
Abstract:
Time-index of refraction isotherms for a borosilicate glass in the transformation region have been established. By comparing two quenched glasses of the same index, one quenched after attaining equilibrium at a given temperature and the other quenched from a temperature at which the specimen was approaching a higher value of index, curves similar to the one obtained by Ritland in comparing rate cooled and quenched specimens are developed.

