ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The glasses of the series (1-x)[0.5ZnO-0.1B2O3-0.4P2O5]-xMoO3 with 0 ≤ x ≤ 0.6 wereprepared by slow cooling of the melt. These glasses were characterized by the measurements ofdensity, molar volume, chemical durability, glass transition temperature and the thermal expansioncoefficient. The density and molar volume of the glasses increase with increasing MoO3 content.All glasses crystallize on heating and their crystallization temperature decreases with increasingMoO3 content. An incorporation of MoO3 into the parent borophosphate glass results in asubstantial decrease of their glass transition temperature and also of their chemical durability. Theobserved changes were ascribed to the gradual replacement of stronger P-O-P bonds by weaker Mo-O-P and Mo-O-Mo bonds. ESR spectra revealed the presence of Mo5+ ions responsible for the bluecolour of the glasses and the relative ratio of Mo5+/Mototal decreases with increasing MoO3 content
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.39-40.97.pdf
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