Thermal properties and crystallization behavior of some TeO2-K2O glasses

B. Öz; I. Kabalci; M. L. Öveçoǧlu; G. Özen

doi:10.1016/j.jeurceramsoc.2006.04.143

Thermal properties and crystallization behavior of some TeO₂-K₂O glasses

B. Öz^*, I. Kabalci, M. L. Öveçoǧlu, G. Özen

^*Bu çalışma için yazışmadan sorumlu yazar

Metalurji ve Malzeme Müh.Böl.

Istanbul Technical University

Araştırma sonucu: ???type-name??? › Makale › bilirkişi

15 Atıf (Scopus)

Özet

The effect of K₂O content on the crystallization of binary TeO₂-K₂O glasses was investigated. Glasses with compositions of (1 - x)TeO₂-xK₂O (where x = 0.05, 0.10, 0.15, in molar ratio) were prepared. DTA curves in the temperature range of 25-700 °C with the heating rate of 10 °C/min were used to determine the thermal properties such as glass transition temperature (T_g), crystallization peaks (T_p), and melting temperature (T_m). Crystallization peaks ranging between 364 and 421 °C were detected on the DTA scans. DTA results revealed that the most stable glasses were formed with the modifier concentrations near the eutectic composition, 0.10 mol. Crystallizing phases and microstructural morphology for each composition were characterized by XRD and SEM. On the basis of XRD measurements, α-TeO₂ (paratellurite), γ-TeO₂ and K₂Te₄O₉ (potassium tetratellurite) phases were detected. The K₂Te₄O₉ phase is present in all three glasses, due to the fact that this phase arises because of a phase separation melting of the glass.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	1823-1827
Sayfa sayısı	5
Dergi	Journal of the European Ceramic Society
Hacim	27
Basın numarası	2-3
DOI'lar	https://doi.org/10.1016/j.jeurceramsoc.2006.04.143
Yayın durumu	Yayınlandı - 2007

Finansman

The authors express their grateful thanks to Prof. Dr. M. Ürgen for the use of his experimental equipment. The authors also thank to Research Assistant Murat Telli for recording the XRD patterns and to Sevgin Türkeli for her support in SEM study. This investigation was supported by the State Planning Organization (DPT) under the project title “Advanced Technologies in Engineering”.

Finansörler	Finansör numarası
DPT
Devlet Planlama Örgütü

Belgeye Erişim

10.1016/j.jeurceramsoc.2006.04.143

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

@article{078411d03eb84c53851b880967afa1ec,

title = "Thermal properties and crystallization behavior of some TeO2-K2O glasses",

abstract = "The effect of K2O content on the crystallization of binary TeO2-K2O glasses was investigated. Glasses with compositions of (1 - x)TeO2-xK2O (where x = 0.05, 0.10, 0.15, in molar ratio) were prepared. DTA curves in the temperature range of 25-700 °C with the heating rate of 10 °C/min were used to determine the thermal properties such as glass transition temperature (Tg), crystallization peaks (Tp), and melting temperature (Tm). Crystallization peaks ranging between 364 and 421 °C were detected on the DTA scans. DTA results revealed that the most stable glasses were formed with the modifier concentrations near the eutectic composition, 0.10 mol. Crystallizing phases and microstructural morphology for each composition were characterized by XRD and SEM. On the basis of XRD measurements, α-TeO2 (paratellurite), γ-TeO2 and K2Te4O9 (potassium tetratellurite) phases were detected. The K2Te4O9 phase is present in all three glasses, due to the fact that this phase arises because of a phase separation melting of the glass.",

keywords = "Glass, Microstructure, Thermal properties",

author = "B. {\"O}z and I. Kabalci and {\"O}ve{\c c}oǧlu, {M. L.} and G. {\"O}zen",

year = "2007",

doi = "10.1016/j.jeurceramsoc.2006.04.143",

language = "English",

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pages = "1823--1827",

journal = "Journal of the European Ceramic Society",

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TY - JOUR

T1 - Thermal properties and crystallization behavior of some TeO2-K2O glasses

AU - Öz, B.

AU - Kabalci, I.

AU - Öveçoǧlu, M. L.

AU - Özen, G.

PY - 2007

Y1 - 2007

N2 - The effect of K2O content on the crystallization of binary TeO2-K2O glasses was investigated. Glasses with compositions of (1 - x)TeO2-xK2O (where x = 0.05, 0.10, 0.15, in molar ratio) were prepared. DTA curves in the temperature range of 25-700 °C with the heating rate of 10 °C/min were used to determine the thermal properties such as glass transition temperature (Tg), crystallization peaks (Tp), and melting temperature (Tm). Crystallization peaks ranging between 364 and 421 °C were detected on the DTA scans. DTA results revealed that the most stable glasses were formed with the modifier concentrations near the eutectic composition, 0.10 mol. Crystallizing phases and microstructural morphology for each composition were characterized by XRD and SEM. On the basis of XRD measurements, α-TeO2 (paratellurite), γ-TeO2 and K2Te4O9 (potassium tetratellurite) phases were detected. The K2Te4O9 phase is present in all three glasses, due to the fact that this phase arises because of a phase separation melting of the glass.

AB - The effect of K2O content on the crystallization of binary TeO2-K2O glasses was investigated. Glasses with compositions of (1 - x)TeO2-xK2O (where x = 0.05, 0.10, 0.15, in molar ratio) were prepared. DTA curves in the temperature range of 25-700 °C with the heating rate of 10 °C/min were used to determine the thermal properties such as glass transition temperature (Tg), crystallization peaks (Tp), and melting temperature (Tm). Crystallization peaks ranging between 364 and 421 °C were detected on the DTA scans. DTA results revealed that the most stable glasses were formed with the modifier concentrations near the eutectic composition, 0.10 mol. Crystallizing phases and microstructural morphology for each composition were characterized by XRD and SEM. On the basis of XRD measurements, α-TeO2 (paratellurite), γ-TeO2 and K2Te4O9 (potassium tetratellurite) phases were detected. The K2Te4O9 phase is present in all three glasses, due to the fact that this phase arises because of a phase separation melting of the glass.

KW - Glass

KW - Microstructure

KW - Thermal properties

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M3 - Article

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