NDLI: Thermal and luminescent properties of M$_{2}$Zn(VO$_{3}$)$

Content Provider	Springer Nature Link
Author	Slobodin, B. V. Ishchenko, A. V. Samigullina, R. F. Shul’gin, B. V.
Copyright Year	2013
Abstract	We have developed processes for the synthesis of the Rb$_{2}$Zn(VO$_{3}$)$_{4}$ and Cs$_{2}$Zn(VO$_{3}$)$_{4}$ tetrametavanadates. Rb$_{2}$Zn(VO$_{3}$)$_{4}$ has been prepared by solid-state reaction (350°C) between presynthesized RbVO$_{3}$ and ZnV$_{2}$O$_{6}$ powders, and Cs$_{2}$Zn(VO$_{3}$)$_{4}$ has been prepared by the Pechini method (sol-gel process). Both metavanadates crystallize in monoclinic symmetry (sp. gr. P2$_{1}$/m). Thermochemical characterization results demonstrate that the vanadates undergo complex transformations during heating to 450°C and subsequent cooling. As a result, the materials are in a nonequilibrium state at room temperature and consist of both the parent double metavanadates and their peritectic decomposition products. We believe that the formation of the structure of the M$_{2}$Zn(VO$_{3}$)$_{4}$ compounds from their melts is a kinetically hindered process. These compounds are structurally stable only at temperatures below 369 (Rb$_{2}$Zn(VO$_{3}$)$_{4}$) or 420°C (Cs$_{2}$Zn(VO$_{3}$)$_{4}$). We have measured for the first time the diffuse reflectance and photoluminescence excitation spectra of the two tetrametavanadates in their emission range and their photoluminescence spectra at various excitation wavelengths and determined their chromaticity coordinates. Their X-ray luminescence and scintillation decay characteristics have been determined for the first time under pulsed electron beam excitation. The electron excitation dissipation processes in the cesium and rubidium compounds are shown to be similar. We discuss the origin of the emission bands in the mixed vanadates and their potential application areas.
Starting Page	834
Ending Page	838
Page Count	5
File Format	PDF
ISSN	00201685
Journal	Inorganic Materials
Volume Number	49
Issue Number	8
e-ISSN	16083172
Language	English
Publisher	Springer US
Publisher Date	2013-07-07
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Inorganic Chemistry Industrial Chemistry/Chemical Engineering Materials Science
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Metals and Alloys Chemical Engineering Inorganic Chemistry

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