Synthesis of hydrogen tungsten bronzes HxWO3 by reactive mechanical milling of hexagonal WO3

被引：25

作者：

Castro, Facundo J. ^{[1
]}

Tonus, Florent ^{[2
]}

Bobet, Jean-Louis ^{[2
]}

Urretavizcaya, Guillermina ^{[1
]}

机构：

[1] Ctr Atom Bariloche, CNEA, CONICET, Inst Balseiro UNCuyo, San Carlos De Bariloche, Rio Negro, Argentina

[2] Univ Bordeaux 1, CNRS, UPR 9048, ICMCB, F-33608 Pessac, France

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 495卷 / 02期

关键词：

Hydrogen tungsten bronzes; Mechanical alloying; Hydrogen absorbing materials; TRIOXIDE; FORM;

D O I：

10.1016/j.jallcom.2009.10.109

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Recently, we have reported the formation of hydrogen tungsten bronzes by reactive mechanical milling monoclinic tungsten (VI) oxide under hydrogen atmosphere In this work we report the milling of hexagonal WO3 under H-2 atmosphere Our main results are the structural transformation of the hexagonal oxide to the high temperature polymorph of WO3 with orthorhombic structure, and the formation of different hydrogen tungsten bronzes at distinct milling times. The bronzes seem to be formed from the orthorhombic oxide, and compared with the bronzes obtained by milling monoclinic WO3 are rather unstable after short exposure to air The materials are characterized by X-ray diffraction (XRD), differential scanning calorimetry (DSC) and total hydrogen content determination. (C) 2009 Elsevier B.V All rights reserved

引用

页码：537 / 540

页数：4