Journal of Jilin Institute of Chemical Technology, 2019, 36(3): 74-77    doi: 10.16039/j.cnki.cn22-1249.2019.03.015
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Abnormal Dielectric Properties and Exploration of Self-compensation Mode of Ho3+ in BaTiO3 Ceramics
GAO Xianglu, LU Dayong
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Abstract  

(Ba1-xHox)(Ti1-xHox)O3ceramics (BHTH) were prepared using the cold-pressing ceramic technique. The structure, site occupations, and dielectric properties of BHTH were investigated using X-ray diffraction (XRD), electron paramagnetic resonance (EPR) and dielectric-temperature measuring techniques. The results indicated that Ho3+ ions in the BaTiO3 lattice could form a self-compensation mode with a slight Ba-site-occupation preference. The solubility limit was determined to be x = 0.03 in BHTH. The dielectric behavior of BHTH showed an abnormal phenomenon, i.e. that the Curie temperature (TC) shifted towards high temperatures from 128 °C at x = 0.01 to 131 °C at x = 0.03. The increase in tetragonality (c/a) of the crystal structure of BHTH is the main reason of the increase in TC.

Key words Ho-doped BaTiO3      X-ray diffraction      self-compensation      electron paramagnetic resonance      dielectric properties      
Published: 25 March 2019
:  O614.23  
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GAO Xianglu
LU Dayong
Cite this article:   
GAO Xianglu,LU Dayong. Abnormal Dielectric Properties and Exploration of Self-compensation Mode of Ho3+ in BaTiO3 Ceramics [J]. Journal of Jilin Institute of Chemical Technology, 2019, 36(3): 74-77.
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https://xuebao.jlict.edu.cn/EN/10.16039/j.cnki.cn22-1249.2019.03.015     OR     https://xuebao.jlict.edu.cn/EN/Y2019/V36/I3/74