Abnormal phase transition in BiNbO4 powders prepared by a citrate method
Abnormal phase transition in BiNbO4 powders prepared by a citrate method
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柠檬酸盐法制备BiNbO4粉末的异常相变
DOI：
10.1016/j.jallcom.2011.08.077
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发表时间：
2011-10
影响因子：
6.2
通讯作者：
Wu, Di
中科院分区：
文献类型：
--
作者：
Zhai, Hai-Fa;Qian, Xu;Kong, Ji-Zhou;Li, Ai-Dong;Gong, You-Pin;Li, Hui;Wu, Di
在750℃以下和1040℃以上制备的三斜晶β- binbo4（分别用Low-β和High-β表示）和900℃时制备的纯正交α- binbo4，在binbo4粉末中首次观察到从β- binbo4到α- binbo4的相变。这一现象证明了binbo4粉体体系中存在从β- binbo4到α- binbo4的异常相变。低β粉体的合成可归因于柠檬酸盐法制备bi5nb3o15的中间相。随着温度的升高，由于Low-β的热力学亚稳态，Low-β相逐渐转变为α- binbo4。我们还发现，与粉末样品相比，颗粒形式的应力可以加速binbo4从Low-β相到α相的转变。它为我们带来了对binbo4体系的新认识，也为微波和光催化应用提供了一种简单的方法。
Triclinic β-BiNbO4prepared below 750°C and above 1040°C (denoted as Low-β and High-β, respectively) and pure orthorhombic α-BiNbO4at 900°C were successfully derived from a citrate method and the phase transition from β-BiNbO4to α-BiNbO4was first observed in BiNbO4powders. This phenomenon proves that the abnormal phase transition from β-BiNbO4to α-BiNbO4exists in BiNbO4powder system. The synthesis of Low-β powders can be attributed to the formation of the intermediate phase of Bi5Nb3O15by the citrate method. With increasing temperature, the Low-β phase gradually turns into α-BiNbO4due to the thermodynamically metastable state of Low-β. We also identified that the stress in pellet format can accelerate the phase transition from Low-β to α phase of BiNbO4in comparison with powder samples. It brings us new understanding of the BiNbO4system and also provides a simple way to obtain BiNbO4for microwave and photocatalytic applications.
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影响因子：
--
作者：
J. Choy;Yang-Su Han;Jin-Tai Kim;Yoonho Kim
通讯作者：
J. Choy;Yang-Su Han;Jin-Tai Kim;Yoonho Kim
影响因子：
1.5
作者：
H. Kagata;Tatsuya Inoue;Junichi Kato Junichi Kato-Junichi-Kato;Ichirou Kameyama Ichirou Kameyama-Ichirou-Kameyama
通讯作者：
H. Kagata;Tatsuya Inoue;Junichi Kato Junichi Kato-Junichi-Kato;Ichirou Kameyama Ichirou Kameyama-Ichirou-Kameyama
影响因子：
3
作者：
Cristiane Gomes Almeida;H. Andrade;A. Mascarenhas;L. A. Silva
通讯作者：
Cristiane Gomes Almeida;H. Andrade;A. Mascarenhas;L. A. Silva
影响因子：
3.1
作者：
R. Roth;J. Waring
通讯作者：
R. Roth;J. Waring
DOI：
10.1557/proc-0942-w04-03
发表时间：
2006
期刊：
MRS Proceedings
影响因子：
--
作者：
Aidong Li;Jin-Bo Cheng;Rong-Lu Tang;Q. Shao;Yuefeng Tang;Di Wu;N. Ming
通讯作者：
Aidong Li;Jin-Bo Cheng;Rong-Lu Tang;Q. Shao;Yuefeng Tang;Di Wu;N. Ming