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@article{943512,
author = {Zalga, Arturas and Moravec, Zdeněk and Pinkas, Jiří and Kareiva, Aivaras},
article_location = {Spojené státy americké},
article_number = {1},
keywords = {Sol-gel synthesis; Precursors; TG DSC; Tungstates; Molybdates},
language = {eng},
issn = {1388-6150},
journal = {Journal of Thermal Analysis and Calorimetry},
title = {On the sol-gel preparation of different tungstates and molybdates},
volume = {105},
year = {2011}
}
TY - JOUR
ID - 943512
AU - Zalga, Arturas - Moravec, Zdeněk - Pinkas, Jiří - Kareiva, Aivaras
PY - 2011
TI - On the sol-gel preparation of different tungstates and molybdates
JF - Journal of Thermal Analysis and Calorimetry
VL - 105
IS - 1
SP - 3-11
EP - 3-11
PB - Springer
SN - 13886150
KW - Sol-gel synthesis
KW - Precursors
KW - TG DSC
KW - Tungstates
KW - Molybdates
N2 - The preparation and characterization of the M`-M``-O nitrate-tartrate (M0 = Ca, Ba, Gd and M0 = W, Mo) precursor gels synthesized by simple, inexpensive, and environmentally benign aqueous sol-gel method is reported. The obtained gels were studied by thermal (TG/DSC) analysis. TG/DSC measurements revealed the possible decomposition pathway of synthesized M`-M``-O-nitrate-tartrate gels. For the synthesis of different metal tungstates and molybdates, the precursor gels were calcined at different temperatures (650, 800, and 900 degC). According to the X-ray diffraction (XRD) analysis data, the crystalline compounds CaMo 1-x W x O 4 doped with Ce3+ ions, BaMo 1-x W x O 4 doped with Eu 3+ ions and Gd 2 Mo 3 O 12 were obtained from nitrate-tartrate gels annealed at 650-900 degC temperatures. The XRD data confirmed that the fully crystalline single-phase powellite, scheelite, or Gd 2 (MoO 4 ) 3 structures were formed already at 650 degC. Therefore, the suggested sol-gel method based on the complexation of metal ions with tartaric acid is suitable for the preparation of mixed tungstates-molybdates at relatively low temperature in comparison with solid-state synthesis.
ER -
ZALGA, Arturas, Zdeněk MORAVEC, Jiří PINKAS a Aivaras KAREIVA. On the sol-gel preparation of different tungstates and molybdates. \textit{Journal of Thermal Analysis and Calorimetry}. Spojené státy americké: Springer, 2011, roč.~105, č.~1, s.~3-11. ISSN~1388-6150.
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