Synthesis of Precursors ZrMo2-xWxO7(OH,Cl)2·2H2O and Cubic ZrMo2-xWxO8 Thermal Contraction Compounds by Acidic

Chem. J. Chinese Universities

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Synthesis of Precursors ZrMo_2-xW_xO₇(OH,Cl)₂·2H₂O and Cubic ZrMo_2-xW_xO₈ Thermal Contraction Compounds by Acidic

GUO Shu-Rong¹, DENG Xue-Bin², Ma Hui³, ZHAO Xin-Hua²

1. Department of Chemistry, Chifeng College, Chifeng 024001, China;
2. Department of Chemistry, 3. Analysis and Test Center, Beijing Normal University, Beijing 100875, China

Received:2006-05-30 Revised:1900-01-01 Online:2007-03-10 Published:2007-03-10
Contact: ZHAO Xin-Hua

Abstract

Abstract: The precursors, ZrW₂O₇(OH,Cl)₂·2H₂O(x=0 ,0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8), of cubic ZrMo_2-xW_xO₈ were synthesized successfully by acidic steam hydrothermal no-wash(ASH-NW) method, in succession the preparation of cubic ZrMo_2-xW_xO₈ were made from the precursors. The relative XRD intensity was proposed to characterize the saturated order degree(η'T) of the metastable order-disorder phases and the correlation was found that the n(Mo)/n(W) ratio is reduced, the order degree(η'_T) is risen under the preparation condition. An argumentation was presented to discuss the effect of raw materials on the morphology of the intermediate phase as well as the products. Furthermore, the outline of the micro-process in which the ammonium salt was used as the raw material during the preparation of precursor was discussed.

Key words: Acidic steam hydrothermal(ASH), No-wash, Precursor ZrMo_2-xW_xO₇(OH,Cl)₂·2H₂O, Cubic ZrMo_2-xW_xO₈, Thermal contraction

CLC Number:

O614
O643

TrendMD:

GUO Shu-Rong¹, DENG Xue-Bin², Ma Hui³, ZHAO Xin-Hua². Synthesis of Precursors ZrMo_2-xW_xO₇(OH,Cl)₂·2H₂O and Cubic ZrMo_2-xW_xO₈ Thermal Contraction Compounds by Acidic [J]. Chem. J. Chinese Universities, doi: .

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Synthesis of Precursors ZrMo_2-xW_xO₇(OH,Cl)₂·2H₂O and Cubic ZrMo_2-xW_xO₈ Thermal Contraction Compounds by Acidic

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