Publikace detail

Zinc borophosphate glasses doped with molybdenum oxide.

Autoři: Šubčík Jiří | Koudelka Ladislav | Mošner Petr | Černošek Zdeněk

Rok: 2008

Druh publikace: článek v odborném periodiku

Název zdroje: Advanced Materials Research

Název nakladatele: Trans Tech Publications

Místo vydání: Zürich - Uetikon

Strana od-do: 97-100

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	Zinečnatá borofosfátová skla s obsahem oxidu molybdenového.	Byl studován vliv přídavku MoO3 na strukturu a vlastnosti zinečnatých borofosfátových skel připravených v kompoziční řadě (1-x)[0.5ZnO-0.1B2O3-0.4P2O5]-xMoO3 s obsahem 0-60 mol% MoO3.
eng	Zinc borophosphate glasses doped with molybdenum oxide.	The glasses of the series (1-x)[0.5ZnO-0.1B2O3-0.4P2O5]-xMoO3 with 0 ≤ x ≤ 0.6 were prepared by slow cooling of the melt. These glasses were characterized by the measurements of density, molar volume, chemical durability, glass transition temperature and the thermal expansion coefficient. The density and molar volume of the glasses increase with increasing MoO3 content. All glasses crystallize on heating and their crystallization temperature decreases with increasing MoO3 content. An incorporation of MoO3 into the parent borophosphate glass results in a substantial decrease of their glass transition temperature and also of their chemical durability. The observed 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 blue colour of the glasses and the relative ratio of Mo5+/Mo total decreases with increasing MoO3 content.	glasses, borophosphates, molybdenum oxide

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