期刊
RESULTS IN PHYSICS
卷 12, 期 -, 页码 585-591出版社
ELSEVIER
DOI: 10.1016/j.rinp.2018.11.094
关键词
Ho-doped BaTiO3; Dielectrics; Self-compensation mode; Point defects; The Curie temperature
资金
- National Natural Science Foundation of China [21271084]
- National Natural Science Foundation of Jilin Province [20160101290JC]
- project of the Changbai Mountain Scholar Distinguished Professor [2015047]
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.
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