Research output: Contribution to journal › Article › peer-review
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. / Petrushina, Mariya Yu; Dedova, Elena S.; Filatov, Eugeny Yu et al.
In: Scientific Reports, Vol. 8, No. 1, 5337, 28.03.2018, p. 5337.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - 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
AU - Petrushina, Mariya Yu
AU - Dedova, Elena S.
AU - Filatov, Eugeny Yu
AU - Plyusnin, Pavel E.
AU - Korenev, Sergei V.
AU - Kulkov, Sergei N.
AU - Derevyannikova, Elizaveta A.
AU - Sharafutdinov, Marat R.
AU - Gubanov, Alexander I.
N1 - Publisher Copyright: © 2018 The Author(s).
PY - 2018/3/28
Y1 - 2018/3/28
N2 - 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.
AB - 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.
KW - MATERIAL CUBIC ZRMO2O8
KW - ZRW2O8
UR - http://www.scopus.com/inward/record.url?scp=85044542955&partnerID=8YFLogxK
U2 - 10.1038/s41598-018-23529-6
DO - 10.1038/s41598-018-23529-6
M3 - Article
C2 - 29593240
AN - SCOPUS:85044542955
VL - 8
SP - 5337
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
IS - 1
M1 - 5337
ER -
ID: 12232405