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Light Scattering from Phase‐Separated Glass
Author(s) -
KERWAWYCZ JOHN,
TOMOZAWA MINORU
Publication year - 1974
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1974.tb11391.x
Subject(s) - scattering , diffusion , refractive index , phase (matter) , optics , light scattering , interference (communication) , constant (computer programming) , materials science , function (biology) , thermal , stress (linguistics) , chemistry , physics , thermodynamics , channel (broadcasting) , electrical engineering , organic chemistry , evolutionary biology , biology , computer science , programming language , engineering , linguistics , philosophy
The intensity of the light scattered from phase‐separated glasses, rather than being constant as a function of angle as expected, exhibits increased backscattering. When interference effects can be neglected, Goldstein's diffusion‐zone model, proposed to explain the scattering data, has been supported by experimental results. Although the refractive‐index profile predicted by Goldstein seems to agree well with existing data, the present workers believe that the source of this profile is not a diffusion zone but rather the stress that results from the differing thermal‐expansion characteristics of the 2 phases. By measuring depolarized scattering as a function of temperature in various scattering planes, the 2 models were compared directly. The diffusion model is shown to be inappropriate, whereas the qualitative predictions of the proposed stress model are confirmed, and the model is established.