Bi0.5Ba0.5Fe0.5Ti0.49Nb0.01O3热敏陶瓷的微结构和电学性能研究

袁昌来; 刘心宇; 马家峰; 周昌荣

doi:10.7498/aps.59.4253

摘要

采用固相合成工艺，制备了Bi05Ba05Fe05Ti049Nb001O3（BBFTN）热敏陶瓷，借助X射线衍射仪、扫描电子显微镜、阻温测试仪和交流阻抗谱考察其微结构、直流电阻、介电特性、阻抗和电学模量方面的电学性能. 结果表明：BBFTN材料依然为立方钙钛矿结构，平均晶粒尺寸约为10 μm，晶格常数相对于BaTiO3的晶格常数有所变大；室温电

关键词:

The Bi0.5Ba0.5Fe0.5Ti0.49Nb0.01O3 thermistor has been prepared by the standard solid-state reaction method, and the microstructures, direct current resistivity, dielectric property, impedance and electric modulus were investigated by the X-ray diffraction, scanning electron microscopy, resistivity-temperature measurement and alternating current impedance spectroscopy. The results show that the material, with an average grain size of about 10 μm, still has cubic perovskite structure, and the lattice constant of the material becomes larger compared with that of the BaTiO3. The resistivity and thermistor contant B value of the material are about 107 Ω·cm and 7690 K, respectively, and the phase transition occurs twice (at 403 and 523 K), which are confirmed by the dielectric spectrum as a function of temperature. The complex impedance spectroscopy shows the non-ideal Debye type with two incomplete overlapping Cole-Cole semicircles corresponding to the grain and grain boundary resistance. The imaginary part of alternating current resistance as a function of frequency indicates there are two relaxation effects observable in the grain and grain boundary. The phase transition has little effect on the conduction property of bulk grain, but a great impact on that of the grain boundary.

Keywords:

作者及机构信息

1.
桂林电子科技大学广西信息材料重点实验室,桂林 541004

基金项目: 广西信息材料重点实验室研究基金(批准号: PF090569)资助的课题.

Authors and contacts

1.
桂林电子科技大学广西信息材料重点实验室,桂林 541004

参考文献

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施引文献

[1]	［1］Viviani M, Buscaglia M T, Buscaglia V, Ostapchuk T, Gregora I, Petzelt J, Mitoseriu L, Nanni P, Testino A, Calderone R, Harnagea C, Zhao Z, Nygren M 2004 J. Eur. Ceram. Soc. 24 1221
[2]	［2］Luo Y, Liu X Y, Li X Q, Liu G Z 2006 Solid State Ionics 177 1543
[3]	［3］Xu C G, Lin D M, Kwok K W 2008 Solid State Sci. 10 934
[4]	［4］Abdelkefi H, Khemakhem H, Vélu G, Carru J C, Mühll R V 2004 Solid State Sci. 6 1347
[5]	［5］Li X B, Zhao X Y, Wang Y J, Wang F F, Chen C, Luo H S 2009 Acta Phys. Sin. 58 4225 (in Chinese) ［李晓兵、赵祥永、汪尧进、王飞飞、陈超、罗豪苏 2009 物理学报 58 4225］
[6]	［6］Sun Y, Huang Z F, Fan H G, Ming X, Wang C Z, Chen G 2009 Acta Phys. Sin. 58 193 (in Chinese) ［孙源、黄祖飞、范厚刚、明星、王春忠、陈岗 2009 物理学报 58 193］
[7]	［7］Dorcet V, Marchet P, Trolliard G 2007 J. Eur. Ceram. Soc. 27 4371
[8]	［8］Chen R, Yu S W, Zhang G J, Cheng J R, Meng Z Y 2006 Trans. Nonfer. Met. Soc. China 16 S116
[9]	［9］Srinivas A, Boey F, Sritharan T, Kim D W, Hong K S 2004 Ceram. Int. 30 1427
[10]	］Ueda K, Tabata H, Kawai T 1999 Appl. Phys. Lett. 75 555
[11]	］Kashlinskii A I, Chechernikov V I, Venvtsev Y N 1969 Sov. Phys. Solid State 8 2074
[12]	］Ismailzade I H, Ismailov I M, Alekberov A I, Salaev F M 1981 Phys. Stat. Sol. (a) 68 K81
[13]	］Kumar M M, Suresh M B, Suryanarayana S V, Kumar G S, Bhimasankaram T 1998 J. Appl. Phys. 84 6811
[14]	］Kumar M M, Srinath S, Kumar G S, Suryanarayana S V 1998 J. Magn. Magn. Mater. 188 203
[15]	］Rahaman M N, Manalert R 1998 J. Eur. Ceram. Soc. 18 1063
[16]	］Brzozowski E, Castro M S 2005 J. Mater. Process. Technol. 168 464
[17]	］Kim J S, Cheon C, Kang H J, Jang P W 2007 J. Eur. Ceram. Soc. 27 3951
[18]	］Behera B, Nayak P, Choudhary R N P 2009 Curr. Appl. Phys. 9 201
[19]	］Nobre M A L 2003 J. Appl. Phys. 93 5576
[20]	］Buscaglia M T, Mitoseriu L, Buscaglia V, Pallecchi I, Viviani M, Nanni P, Siri A S 2006 J. Eur. Ceram. Soc. 26 3027
[21]	］Li W, Schwartz R W 2007 Phys . Rev. B 75 012104
[22]	］Xiang J, Wang X H 2008 Acta Phys. Sin. 57 4417 (in Chinese) ［向军、王晓晖 2008 物理学报 57 4417］

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