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; Vol. 8
| Parent link: | Scientific Reports Vol. 8.— 2018.— [5337, 7 p.] |
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| Institution som forfatter: | |
| Andre forfattere: | , , , , , , , , |
| Summary: | Title screen 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. |
| Sprog: | engelsk |
| Udgivet: |
2018
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| Fag: | |
| Online adgang: | https://doi.org/10.1038/s41598-018-23529-6 |
| Format: | Electronisk Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=667037 |
MARC
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| 200 | 1 | |a 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 |f M. Yu. Petrushina, E. S. Dedova, E. Yu. Filatov [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 21 tit.] | ||
| 330 | |a 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. | ||
| 461 | |t Scientific Reports | ||
| 463 | |t Vol. 8 |v [5337, 7 p.] |d 2018 | ||
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| 701 | 1 | |a Filatov |b E. Yu. |g Evgeny Yurjevich | |
| 701 | 1 | |a Plyusnin |b P. E. |g Pavel Evgenjevich | |
| 701 | 1 | |a Korenev |b S. V. |g Sergey Vasiljevich | |
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