EFFECT OF HALOGENS ON SPECTRAL AND PHOTOSENSITIVE PROPERTIES OF PHOTO-THERMO-REFRACTIVE GLASSES
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Effect of bromine and fluorine on spectral and photosensitive properties of photo-thermo-refractive glasses has been investigated. Mechanism of photo-thermo-induced glass crystallization has been proposed. According to experimental results it has been suggested that colloid silver particles are nucleation centers under the temperature close to the glass transformation temperature. Liquid phase consisted of silver bromide with attenuated sodium fluoride forms around these particles. Nanocrystals with the complicated structure of AgBr-NaF exude on the colloid silver surface during the cooling.
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