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Correlation between the structural relaxation and the functionality of optically functional glasses; Kokinosei glass ni okeru kozo kanwa to kinosei no sokan

Journal Article:

Abstract

A discussion was given to elucidate the correlation between the crystallization of infrared ray permeating glass and the infrared ray permeability. The elucidation used infrared ray permeation spectrum, infrared ray absorption spectrum, and the Mosbauer effect. Reduction in permeability due to heat treatment of aluminate glass was discussed from the crystallization mechanism. Ultrafine crystals of mayenite phase having a composition ratio of CaO/Al2O3 = 1.7 diffuse and grow from the glass surface into interior as a result of heat treatment. The crystal growth is triggered by severance of Al-O tetrahedron. Gallate glass has CaGa2O4 and small amount of CaFe2O4 phase deposited when it is heat-treated in the vicinity of Tg. Although the infrared ray permeability decreases in association with the crystallization, the decrease is limited to crystallization on the glass surface, hence the permeability will not fall to zero. Laser irradiation on the gallate glass causes crystallization, resulting in reduced infrared ray permeability. Semi-stable Ca3Ga4O7 phase remains, however, because the heat energy amount is not large. Tellurite glass has {alpha}-TeO2 and a small amount of telluric acid iron deposit when heat-treated. 29 refs., 10 figs.
Authors:
Nishida, T [1] 
  1. Kyushu University, Fukuoka (Japan). Faculty of Engineering
Publication Date:
Dec 15, 1994
Product Type:
Journal Article
Reference Number:
SCA: 400102; 440600; PA: NEDO-95:950061; EDB-95:085059; SN: 95001398248
Resource Relation:
Journal Name: Asahi Garasu Zaidan Josei Kenkyu Seika Hokokusho; Other Information: PBD: 15 Dec 1994
Subject:
40 CHEMISTRY; 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; GLASS; OPTICAL PROPERTIES; FUNCTIONALS; CRYSTAL STRUCTURE; LIGHT TRANSMISSION; RELAXATION; INFRARED RADIATION; INFRARED SPECTRA; ABSORPTION SPECTRA; PERFORMANCE; CRYSTALLIZATION; OPACITY; MOESSBAUER EFFECT; CALCIUM OXIDES; ALUMINIUM OXIDES; HEAT TREATMENTS; CRYSTAL GROWTH
OSTI ID:
53576
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: XZ3103; TRN: 95:950061
Submitting Site:
NEDO
Size:
pp. 97-105
Announcement Date:
Jun 19, 1995

Journal Article:

Citation Formats

Nishida, T. Correlation between the structural relaxation and the functionality of optically functional glasses; Kokinosei glass ni okeru kozo kanwa to kinosei no sokan. Japan: N. p., 1994. Web.
Nishida, T. Correlation between the structural relaxation and the functionality of optically functional glasses; Kokinosei glass ni okeru kozo kanwa to kinosei no sokan. Japan.
Nishida, T. 1994. "Correlation between the structural relaxation and the functionality of optically functional glasses; Kokinosei glass ni okeru kozo kanwa to kinosei no sokan." Japan.
@misc{etde_53576,
title = {Correlation between the structural relaxation and the functionality of optically functional glasses; Kokinosei glass ni okeru kozo kanwa to kinosei no sokan}
author = {Nishida, T}
abstractNote = {A discussion was given to elucidate the correlation between the crystallization of infrared ray permeating glass and the infrared ray permeability. The elucidation used infrared ray permeation spectrum, infrared ray absorption spectrum, and the Mosbauer effect. Reduction in permeability due to heat treatment of aluminate glass was discussed from the crystallization mechanism. Ultrafine crystals of mayenite phase having a composition ratio of CaO/Al2O3 = 1.7 diffuse and grow from the glass surface into interior as a result of heat treatment. The crystal growth is triggered by severance of Al-O tetrahedron. Gallate glass has CaGa2O4 and small amount of CaFe2O4 phase deposited when it is heat-treated in the vicinity of Tg. Although the infrared ray permeability decreases in association with the crystallization, the decrease is limited to crystallization on the glass surface, hence the permeability will not fall to zero. Laser irradiation on the gallate glass causes crystallization, resulting in reduced infrared ray permeability. Semi-stable Ca3Ga4O7 phase remains, however, because the heat energy amount is not large. Tellurite glass has {alpha}-TeO2 and a small amount of telluric acid iron deposit when heat-treated. 29 refs., 10 figs.}
journal = {Asahi Garasu Zaidan Josei Kenkyu Seika Hokokusho}
journal type = {AC}
place = {Japan}
year = {1994}
month = {Dec}
}