Mechanosynthesis of the whole xBiFeO3-(1-x)PbTiO3 multiferroic system: structural characterization and study of phase transitions

被引:54
|
作者
Correas, Covadonga [1 ]
Hungria, Teresa [1 ]
Castro, Alicia [1 ]
机构
[1] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain
关键词
SOLID-SOLUTION; MECHANOCHEMICAL ACTIVATION;
D O I
10.1039/c0jm03185b
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
Among the recently investigated magnetoelectric materials, those belonging to the solid solution xBiFeO(3)-(1 - x)PbTiO3 (xBF-(1 - x)PT) seem to be the most promising. However, there is not much information about the characteristics of this system in the whole range of compositions. In this work, the preparation of the system for compositions with 0 <= x <= 1 is described. The synthesis has been successfully achieved by mechanosynthesis in a high-energy planetary mill. A structural characterization of the mechanosynthesized phases, before and after different thermal treatments, has been carried out by X-ray powder diffraction (XRD), in order to analyze the crystallographic evolution of the phases, correlated to the phase transitions detected by differential thermal analysis (DTA). The structural characterization has allowed the range of compositions of the morphotropic phase boundary (MPB) to be established. First order ferro-paraelectric transitions have been detected by DTA measurements in the whole range of the system and the corresponding Curie temperatures have been determined. Moreover, a comparative microstructural study of the ceramic materials corresponding to the x = 1, 0.7 and 0.6 compositions, prepared by two different processing methods (conventional sintering and spark plasma sintering (SPS)), is reported.
引用
收藏
页码:3125 / 3132
页数:8
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