Kinetic study and optical investigations of some TeO2-GeO 2 glasses

V. Kalem; G. Özen; F. Altin; M. L. Öveçoǧlu; M. R. Özalp

Kinetic study and optical investigations of some TeO₂-GeO ₂ glasses

V. Kalem^*, G. Özen, F. Altin, M. L. Öveçoǧlu, M. R. Özalp

^*Corresponding author for this work

Department of Metallurgical and Materials Engineering

Istanbul Technical University

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

On the basis of DTA analyses of 0.9TeO₂ - 0.1GeO₂ and 0.8TeO₂ - 0.2GeO₂ glasses, the Avrami parameters were determined to be 3 indicating that the mechanism for the crystallization is bulk crystallization. DTA analyses were carried out at different heating rates and two crystallization peaks were observed for both of the glass compositions. The crystallization activation energies were determined by using the variation of peak temperatures with the heating rate. The absorption spectra measured between 300 - 800 nm wavelength region were used to determine the optical band-gap and Urbach energies of the glasses. It is found that they both are a function of glass composition.

Original language	English
Pages (from-to)	1919-1922
Number of pages	4
Journal	Key Engineering Materials
Volume	264-268
Issue number	III
Publication status	Published - 2004
Event	Proceedings of the 8th Conference and Exhibition of the European Ceramic Society - Istanbul, Turkey Duration: 29 Jun 2003 → 3 Jul 2003

Keywords

Crystallization behavior
Optical energy gap
TeO-GeO glasses

Cite this

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title = "Kinetic study and optical investigations of some TeO2-GeO 2 glasses",

abstract = "On the basis of DTA analyses of 0.9TeO2 - 0.1GeO2 and 0.8TeO2 - 0.2GeO2 glasses, the Avrami parameters were determined to be 3 indicating that the mechanism for the crystallization is bulk crystallization. DTA analyses were carried out at different heating rates and two crystallization peaks were observed for both of the glass compositions. The crystallization activation energies were determined by using the variation of peak temperatures with the heating rate. The absorption spectra measured between 300 - 800 nm wavelength region were used to determine the optical band-gap and Urbach energies of the glasses. It is found that they both are a function of glass composition.",

keywords = "Crystallization behavior, Optical energy gap, TeO-GeO glasses",

author = "V. Kalem and G. {\"O}zen and F. Altin and {\"O}ve{\c c}oǧlu, {M. L.} and {\"O}zalp, {M. R.}",

year = "2004",

language = "English",

volume = "264-268",

pages = "1919--1922",

journal = "Key Engineering Materials",

issn = "1013-9826",

publisher = "Trans Tech Publications Ltd",

number = "III",

note = "Proceedings of the 8th Conference and Exhibition of the European Ceramic Society ; Conference date: 29-06-2003 Through 03-07-2003",

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TY - JOUR

T1 - Kinetic study and optical investigations of some TeO2-GeO 2 glasses

AU - Kalem, V.

AU - Özen, G.

AU - Altin, F.

AU - Öveçoǧlu, M. L.

AU - Özalp, M. R.

PY - 2004

Y1 - 2004

N2 - On the basis of DTA analyses of 0.9TeO2 - 0.1GeO2 and 0.8TeO2 - 0.2GeO2 glasses, the Avrami parameters were determined to be 3 indicating that the mechanism for the crystallization is bulk crystallization. DTA analyses were carried out at different heating rates and two crystallization peaks were observed for both of the glass compositions. The crystallization activation energies were determined by using the variation of peak temperatures with the heating rate. The absorption spectra measured between 300 - 800 nm wavelength region were used to determine the optical band-gap and Urbach energies of the glasses. It is found that they both are a function of glass composition.

AB - On the basis of DTA analyses of 0.9TeO2 - 0.1GeO2 and 0.8TeO2 - 0.2GeO2 glasses, the Avrami parameters were determined to be 3 indicating that the mechanism for the crystallization is bulk crystallization. DTA analyses were carried out at different heating rates and two crystallization peaks were observed for both of the glass compositions. The crystallization activation energies were determined by using the variation of peak temperatures with the heating rate. The absorption spectra measured between 300 - 800 nm wavelength region were used to determine the optical band-gap and Urbach energies of the glasses. It is found that they both are a function of glass composition.

KW - Crystallization behavior

KW - Optical energy gap

KW - TeO-GeO glasses

UR - http://www.scopus.com/inward/record.url?scp=8644228654&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:8644228654

SN - 1013-9826

VL - 264-268

SP - 1919

EP - 1922

JO - Key Engineering Materials

JF - Key Engineering Materials

IS - III

T2 - Proceedings of the 8th Conference and Exhibition of the European Ceramic Society

Y2 - 29 June 2003 through 3 July 2003

ER -

Kinetic study and optical investigations of some TeO₂-GeO ₂ glasses

Abstract

Keywords

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