Investigation of the structural and microstructural properties of Gd3+-modified BaTiO3 ceramics

被引：2
|
作者：
Oliveira, M. A. [1 ,2 ]
Silva, M. C. O. [1 ]
M'peko, J. C. [3 ]
Hernandes, A. C. [3 ]
Mendez-Gonzalez, Y. [1 ,4 ]
Guerra, J. D. S. [1 ]
机构：
[1] Univ Fed Uberlandia, Inst Fis, Grp Ferroeletr & Mat Multifunc, Uberlandia, MG, Brazil
[2] UNESP, Dept Fis & Quim, Campus Ilha Solteira, Ilha Solteira, SP, Brazil
[3] Univ Sao Paulo, IFSC, Grp Nanomat & Ceram Avancadas, Sao Carlos, SP, Brazil
[4] Univ La Habana, Inst Ciencia & Tecnol Mat, Fac Fis, Havana, Cuba
来源：
FERROELECTRICS | 2019年 / 545卷 / 01期
基金：
巴西圣保罗研究基金会;
关键词：
Barium titanate; ceramics; Pechini's method; structural properties; CHEMISTRY; CRYSTAL;
D O I：
10.1080/00150193.2019.1621710
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Structural and microstructural properties of lead-free BaBa1-xGdxTiO3 ceramics are investigated. The results confirm the formation of the ferroelectric phase, for all the cases, revealing a decrease in the unit-cell volume (V) with the increase of the gadolinium concentration, which can be associated to the difference between the ionic-radii of the involved ions (Gd3+ and Ba2+). A decrease in the average grain-size, with the increase of the Gd3+ content, was associated to the pinning effect (typical of rare-earths) due to the contribution of minor additional phase, which is not easily detectable by X-ray diffraction technique at very low dopant concentrations.
引用
收藏
页码：47 / 54
页数：8
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