Preparation of Zr(Mo,W)2O8 with a larger negative thermal expansion by controlling the thermal decomposition of Zr(Mo,W)2(OH,Cl)2·2H2O

Mariya Yu Petrushina, Elena S. Dedova, Eugeny Yu Filatov, Pavel E. Plyusnin, Sergei V. Korenev, Sergei N. Kulkov, Elizaveta A. Derevyannikova, Marat R. Sharafutdinov, Alexander I. Gubanov

Результат исследований: Материалы для журналаСтатья

2 Цитирования (Scopus)

Аннотация

Solid solutions of Zr(Mo,W)2O7(OH,Cl)2·2H2O with a preset ratio of components were prepared by a hydrothermal method. The chemical composition of the solutions was determined by energy dispersive X-ray spectroscopy (EDX). For all the samples of ZrMoxW2-xO7(OH,Cl)2·2H2O (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, and 2.0), TGA and in situ powder X-ray diffraction (PXRD) studies (300-1100 K) were conducted. For each case, the boundaries of the transformations were determined: Zr(Mo,W)2O7(OH,Cl)2·2H2O → orthorhombic-ZrMoxW2-xO8 (425-525 K), orthorhombic-ZrMoxW2-xO8 → cubic-ZrMoxW2-xO8 (700-850 K), cubic-ZrMoxW2-xO8 → trigonal-ZrMoxW2-xO8 (800-1050 K for x > 1) and cubic-ZrMoxW2-xO8 → oxides (1000-1075 K for x ≤ 1). The cell parameters of the disordered cubic-ZrMoxW2-xO8 (space group Pa-3) were measured within 300-900 K, and the thermal expansion coefficients were calculated: -3.5·10-6 - -4.5·10-6 K-1. For the ordered ZrMo1.8W0.2O8 (space group P213), a negative thermal expansion (NTE) coefficient -9.6·10-6 K-1 (300-400 K) was calculated. Orthorhombic-ZrW2O8 is formed upon the decomposition of ZrW2O7(OH,Cl)2·2H2O within 500-800 K.

Язык оригиналаАнглийский
Номер статьи5337
ЖурналScientific Reports
Том8
Номер выпуска1
DOI
СостояниеОпубликовано - 1 дек 2018

ASJC Scopus subject areas

  • General

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  • Цитировать

    Petrushina, M. Y., Dedova, E. S., Filatov, E. Y., Plyusnin, P. E., Korenev, S. V., Kulkov, S. N., Derevyannikova, E. A., Sharafutdinov, M. R., & Gubanov, A. I. (2018). Preparation of Zr(Mo,W)2O8 with a larger negative thermal expansion by controlling the thermal decomposition of Zr(Mo,W)2(OH,Cl)2·2H2O. Scientific Reports, 8(1), [5337]. https://doi.org/10.1038/s41598-018-23529-6