Microstructural characterization and crystallization kinetics of (1-x)TeO2-xLiCl (x = 0.6-0.4 mol) glasses

M. L. Öveçoǧlu; G. Özen; B. Demirata; A. Genç

doi:10.1016/S0955-2219(00)00187-4

Microstructural characterization and crystallization kinetics of (1-x)TeO₂-xLiCl (x = 0.6-0.4 mol) glasses

M. L. Öveçoǧlu^*
, G. Özen
, B. Demirata
, A. Genç

^*Bu çalışma için yazışmadan sorumlu yazar

Metalurji ve Malzeme Müh.Böl.

Istanbul Technical University

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

14 Atıf (Scopus)

Özet

On the basis of DTA analyses, three (1-x)TeO₂-xLiCl (x = 0.3, 0.35 and 0.4 mol) glasses doped with 0.005 mol of Tm₂O₃ were crystallized in the vicinity of 400 °C. X-ray investigations for samples heated to 425 °C (above the peak crystallization temperature) followed by quenching in air, revealed the presence of the paratellurite (TeO₂) as the only crystallizing phase in all glass compositions. SEM investigations revealed that the paratellurite crystals formed in these glasses as a result of surface crystallization were trigonal in shape, between 40 and 50 μm in length, 7 and 15 μm in width and 5 and 9 μm in depth. DTA analyses were carried out on the 0.7TeO₂-0.3LiCl glass at different heating rates and an activation energy value of 238 kJ/mol for surface crystallization was determined graphically from a Kissinger-type plot using the analysis of Matusita and Sakka.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	177-183
Sayfa sayısı	7
Dergi	Journal of the European Ceramic Society
Hacim	21
Basın numarası	2
DOI'lar	https://doi.org/10.1016/S0955-2219(00)00187-4
Yayın durumu	Yayınlandı - Şub 2001

Finansman

The authors would like to express their gratitude to Prof. Dr. D. Ülkü for serving as technical advisor for the TTGV-180/S (Technology Development Foundation of Turkey) project out of which this investigation has emerged. We also acknowledge the help and contribution of Ms. Nurten Dinçer during the SEM and DTA investigations of this study. This research has been partially supported by the Research Foundation of Istanbul Technical University under the contract number 594.

Finansörler	Finansör numarası
Istanbul Teknik Üniversitesi	594

Belgeye Erişim

10.1016/S0955-2219(00)00187-4

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "Microstructural characterization and crystallization kinetics of (1-x)TeO2-xLiCl (x = 0.6-0.4 mol) glasses",

abstract = "On the basis of DTA analyses, three (1-x)TeO2-xLiCl (x = 0.3, 0.35 and 0.4 mol) glasses doped with 0.005 mol of Tm2O3 were crystallized in the vicinity of 400 °C. X-ray investigations for samples heated to 425 °C (above the peak crystallization temperature) followed by quenching in air, revealed the presence of the paratellurite (TeO2) as the only crystallizing phase in all glass compositions. SEM investigations revealed that the paratellurite crystals formed in these glasses as a result of surface crystallization were trigonal in shape, between 40 and 50 μm in length, 7 and 15 μm in width and 5 and 9 μm in depth. DTA analyses were carried out on the 0.7TeO2-0.3LiCl glass at different heating rates and an activation energy value of 238 kJ/mol for surface crystallization was determined graphically from a Kissinger-type plot using the analysis of Matusita and Sakka.",

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T1 - Microstructural characterization and crystallization kinetics of (1-x)TeO2-xLiCl (x = 0.6-0.4 mol) glasses

AU - Öveçoǧlu, M. L.

AU - Özen, G.

AU - Demirata, B.

AU - Genç, A.

PY - 2001/2

Y1 - 2001/2

N2 - On the basis of DTA analyses, three (1-x)TeO2-xLiCl (x = 0.3, 0.35 and 0.4 mol) glasses doped with 0.005 mol of Tm2O3 were crystallized in the vicinity of 400 °C. X-ray investigations for samples heated to 425 °C (above the peak crystallization temperature) followed by quenching in air, revealed the presence of the paratellurite (TeO2) as the only crystallizing phase in all glass compositions. SEM investigations revealed that the paratellurite crystals formed in these glasses as a result of surface crystallization were trigonal in shape, between 40 and 50 μm in length, 7 and 15 μm in width and 5 and 9 μm in depth. DTA analyses were carried out on the 0.7TeO2-0.3LiCl glass at different heating rates and an activation energy value of 238 kJ/mol for surface crystallization was determined graphically from a Kissinger-type plot using the analysis of Matusita and Sakka.

AB - On the basis of DTA analyses, three (1-x)TeO2-xLiCl (x = 0.3, 0.35 and 0.4 mol) glasses doped with 0.005 mol of Tm2O3 were crystallized in the vicinity of 400 °C. X-ray investigations for samples heated to 425 °C (above the peak crystallization temperature) followed by quenching in air, revealed the presence of the paratellurite (TeO2) as the only crystallizing phase in all glass compositions. SEM investigations revealed that the paratellurite crystals formed in these glasses as a result of surface crystallization were trigonal in shape, between 40 and 50 μm in length, 7 and 15 μm in width and 5 and 9 μm in depth. DTA analyses were carried out on the 0.7TeO2-0.3LiCl glass at different heating rates and an activation energy value of 238 kJ/mol for surface crystallization was determined graphically from a Kissinger-type plot using the analysis of Matusita and Sakka.

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