Tm3+离子在BaTiO3介电陶瓷中的位占据研究

doi:10.16039/j.cnki.cn22-1249.2018.01.011

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摘要 Tm在BaTiO₃晶格中的位占据一直是存在争议的问题.针对按照名义分子式制备的(Ba_1－_xTm_x)Ti_1－x/4O₃(BTmT)和Ba(Ti_1－xTm_x) O₃( BTTm) 陶瓷，采用 X 射线衍射(XRD)和电子顺磁共振(EPR)技术，鉴定 Tm3+离子在 BaTiO₃ 晶格中的位占据情况．结果表明:Tm³⁺ 在 BaTiO₃晶格中的位占据与Ba/Ti比有关．在 Ba /Ti＞1 时，Tm³⁺离子基本不溶于 BaTiO₃晶格．当 Ba /Ti＜1 时， Tm³⁺ 离子在 BTmT 陶瓷中的固溶度为 x=0.02，且表现为四方钙钛矿结构; 通过晶胞体积比较可知， Tm³⁺ 显示同时占据 Ba 位和 Ti 位的双性行为，并表现出 Ba 位喜好倾向．

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	梁月
	路大勇

关键词: 钛酸钡位占据 X 射线衍射电子顺磁共振点缺陷

Abstract: The site occupations of Tm³⁺ ions in the BaTiO₃ lattice has always been a controversial problem．For
ceramics prepared according to the nominal formula ( Ba_1－_x Tm_x ) Ti_1－x/4 O₃ ( BTmT) and Ba ( Ti_1－_x Tm_x ) O₃
( BTTm) ， X-ray diffraction ( XRD) and electron paramagnetic resonance ( EPR) techniques were used to
identify the site occupations of Tm3+ ions in the BaTiO₃lattice．The results indicated that the position of Tm³⁺ in
BaTiO₃ lattice is related to Ba /Ti ratio．In the case of Ba /Ti＞1， Tm³⁺ ions are basically insoluble in BaTiO₃
lattice．When Ba /Ti＜1，the solubility limit of Tm³⁺ ions at the Ba-sites in BTmT ceramics is x = 0．02，and these
ceramics exhibited a tetragonal perovskite structure． a conclusion can be drawn by comparing the volume of
crystal packages that Tm³⁺ ions showed the amphoteric behavior that occupied Ba sites and Ti sites．

Key words: BaTiO3 Site occupation X-ray diffraction electron paramagnetic resonance point defect

出版日期: 2018-01-25 发布日期: 2018-01-25 整期出版日期: 2018-01-25

O 614.23

引用本文:

梁月, 路大勇. Tm³⁺离子在BaTiO₃介电陶瓷中的位占据研究[J]. 吉林化工学院学报, 2018, 35(1): 44-46.
LIANG Yue, LU Da-yong. Study on the Site Occupations of Tm³⁺ Ions in BaTiO₃ Dielectric Ceramics. Journal of Jilin Institute of Chemical Technology, 2018, 35(1): 44-46.

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https://xuebao.jlict.edu.cn/CN/10.16039/j.cnki.cn22-1249.2018.01.011 或 https://xuebao.jlict.edu.cn/CN/Y2018/V35/I1/44

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