Authors:
L. Abbas Céramiques et Verres, Faculté des Sciences et Techniques Errachidia, UFR, PCMI, B.P. 509, Boutalamine, Frrachidia, Maroc

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L. Bih Céramiques et Verres, Faculté des Sciences et Techniques Errachidia, UFR, PCMI, B.P. 509, Boutalamine, Frrachidia, Maroc

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A. Nadiri Faculté des Sciences de Meknes, UFR-SMI, Meknes, Maroc

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Y. El Amraoui FST-Errachidia, LPSMS, Errachidia, Maroc

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H. Khemakhem Faculté des Sciences de Sfax, LPA, Sfax, Tunisie

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D. Mezzane FST-Guéliz, LESEO, Marrakech, Maroc

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Abstract  

Thermal and chemical durability studies of the phosphate glasses belonging to the binary MoO3-P2O5 and the ternary K2O-MoO3-P2O5 systems are reported. The chemical resistant attack tests carried out on the free alkaline MoO3-P2O5 glasses show that the glass associated with the P/Mo ratio 2 has the high chemical durability. It shows also a high glass transition temperature value. The above findings are interpreted in terms of the cross-link density of the glasses and the strength of the M-O bonds (M=P, Mo). The influence of K2O addition on the properties (density, Tg, durability) of this binary high water resistant glass is studied. It is found that the chemical durability along with the other physical properties are reduced by the incroporation of K2O in the glass matrix. The results were explained by assuming the formation of non-bridging oxygens and weak bonds. The mechanism of the dissolution of these glasses is proposed.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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