Abnormal Curie-temperature shift in Ho-doped BaTiO3 ceramics with the self-compensation mode

被引：20

作者：

Lu, Da-Yong ^{[1
]}

Gao, Xiang-Lu ^{[1
]}

Wang, Shan ^{[1
]}

机构：

[1] Jilin Inst Chem Technol, Key Lab Special Funct Mat Jilin Prov Univ, Jilin 132022, Jilin, Peoples R China

来源：

RESULTS IN PHYSICS | 2019年 / 12卷

基金：

中国国家自然科学基金;

关键词：

Ho-doped BaTiO3; Dielectrics; Self-compensation mode; Point defects; The Curie temperature; RARE-EARTH CATIONS; DIELECTRIC-PROPERTIES; DEFECT CHEMISTRY; IONIC-RADII; TITANATE; HOLMIUM; SOLUBILITY; CALCIUM;

D O I：

10.1016/j.rinp.2018.11.094

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nominal (Ba1-xHox)(Ti(1-x)Hx)O-3 ceramics (BHTH) were prepared at 1400 degrees C using a mixed-oxides method. The structure, microstructure, dielectric properties, and point defects of BHTH were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) spectroscopy, electron paramagnetic resonance (EPR), and dielectric measurements. Ho3+ in BaTiO3 prefers a self-compensation mode with a slight Ba-site preference, and the solubility limit of Ho3+ in the fine-grained BHTH (0.5 mu m) was determined by XRD to be x = 0.03. An abnormal phenomenon was observed: the Curie temperature of BHTH shifted towards high temperatures from 128 degrees C at x = 0.01 to 131 degrees C at x = 0.03. Ho3+ is inferred to be a potential codopant to achieve X8R specification when BaTiO3 is doped with Ho3+ and other types of ions.

引用

页码：585 / 591

页数：7

共 22 条

[21] Low temperature sintering of high permittivity BaTiO3 based X8R ceramics doped with Li2O-Bi2O3-B2O3 frit
Hu, Zhenyu
Cui, Bin
Jing, Shuai
Wang, Yaoyu
MATERIALS LETTERS, 2013, 113 : 167 - 169
[22] Fabrication of lanthanum doped BaTiO3 fine-grained ceramics with a high dielectric constant and temperature-stable dielectric properties using hydro-phase method at atmospheric pressure
Wang, Yan
Miao, Kangkang
Wang, Weijing
Qin, Yi
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2017, 37 (06) : 2385 - 2390

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