International Journal of Materials Science and Applications
Volume 8, Issue 1, January 2019, Pages: 12-20
Received: Jul. 16, 2018;
Accepted: Aug. 2, 2018;
Published: Jun. 26, 2019
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Mengyuan Zhang, Department of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
Congyu Li, Department of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
Fangxu Chen, Department of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
Long Chen, Department of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
Jianhua Liu, Department of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
Tianyu Chen, Department of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
Chen Zhang, Department of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
The crystalline structure, surface morphology, dielectric and ferroelectric properties of 0~10wt% Ho2O3 doped (Ba0.75Sr0.25) TiO3 ceramics prepared by conventional solid state method were studied using X-ray diffractometer, scanning electron microscopy, LCR measuring system and ferroelectric property test systems aiming for ceramic capacitor applications. It is found that proper amount of Ho2O3 can refine grains of the system. With the increase of Ho2O3 doping content, the average grain size of (Ba0.75Sr0.25) TiO3 ceramics decreases. When Ho2O3>8 wt%, (Ba0.75Sr0.25) TiO3 based ceramic samples are multi-phase compounds with typical perovskite structure accompanied by the appearance of cylindrical grains. The Ho3+ ions substitute the host A sites and B sites of (Ba0.75Sr0.25) TiO3 perovskite lattice, resulting in the lattice distortion of the system and the change of the relative dielectric constant and dielectric loss at room temperature. With the increase of Ho2O2 doping content, the relative dielectric constant at room temperature of the system increases first and then decreases. The maximum of relative dielectric constant at room temperature can be found in the 1 wt% Ho2O3 doped (Ba0.75Sr0.25) TiO3 ceramics. When Ho2O3＞1 wt%, the maximum of relative dielectric constant εrmax decreases and the temperature corresponding to the maximum of relative dielectric constant Tm shifts toward lower temperature with the increase of Ho2O3 doping content. The (Ba0.75Sr0.25) TiO3 ceramics with high Ho2O3 content show relaxor-like behavior which is characterized by the typical diffuse phase transition and frequency dispersion of dielectric constant. However, the (Ba0.75Sr0.25) TiO3 ceramics with low Ho2O3 content do not exhibit permittivity frequency dispersion. According to the P-E hysteresis loops of Ho2O3 doped (Ba0.75Sr0.25) TiO3 ceramics, the ferroelectricity was increased and then decreased with the increase of Ho2O3 doping content. With the increase of Ho2O3 doping content, the P-E relationships turn out to be straight lines, implying the paraelectric phase for (Ba0.75Sr0.25) TiO3 ceramics with high Ho2O3 content.
Dielectric and Ferroelectric Properties of Ho2O3 Doped Barium Strontium Titanate Ceramicsq, International Journal of Materials Science and Applications.
Vol. 8, No. 1,
2019, pp. 12-20.
A. Kaura, L. Singha, K. Asokan, Electrical relaxation and conduction mechanisms in iron doped barium strontium titanate, Ceramics International, (2007), doi: 10.1016/j.ceramint.2017.11.158.
A. Kaur, A. Singh, L. Singh, S. K. Mishra, P. D. Babu, K. Asokan, S. Kumar, C. L. Chen, K. S. Yang, D. H. Wei, Structural, magnetic and electronic properties of iron doped barium strontium titanate, RSC Adv., 6 (2016) 112363–112369, doi: 10.1039/C6RA21458D.
A. Ioachim, M. I. Toacsan, M. G. Banciu, L. Nedelcu, A. Dutu, S. Antohe, C. Berbecaru, L. Georgescu, G. Stoica, H. V. Alexandru, Transitions of barium strontium titanate ferroelectric ceramics for different strontium content, Thin solid Films, 515 (2007) 6289–6293, doi: 10.1016/j.tsf.2006.11.097.
M. Paredes-Olguıín, I. A. Lira-Hernández, C. Gó mez-Yáñez, F. P. Espino-Cortés, Compensation mechanisms at high temperature in Y-doped BaTiO3, Physica B, 410 (2013) 157-161, doi: 10.1016/j.physb.2012.11.001.
Y. Tsur, A. Hitomi, I. Scrymgeour, C. A. Randall, Site occupancy of rare-earth cations in BaTiO3, Japanese Journal of Applied Physics, 40 (2001), doi: 10.1143/jjap.40.255.
D. Y. Lu, M. Sugano, M. Toda, High-permittivity double rare earth-doped barium titanate ceramics with diffuse phase transition, J. Am. Ceram. Soc., 89 (2006) 3112–3123, doi: 10.1111/j.1551-2916.2006.00893.x.
D. Kim, J. Kim, T. Noh, J. Ryu, Y. N. Kim, H. Lee, Dielectric properties and temperature stability of BaTiO3 co-doped La2O3 and Tm2O3, Curr. Appl. Phys., 12 (2012) 952–956, doi: 10.1016/j.cap.2011.12.016.
L. Li, M. Wang, D. Guo, R. Fu, Q. Meng, Effect of Gd amphoteric substitution on structure and dielectric properties of BaTiO3-based ceramics, J Electroceram, 30 (2013) 129-132, doi: 10.1007/s10832-012-9773-9.
M. Borah, D. Mohanta, Effect of Gd3+ doping on structural, optical and frequency-dependent dielectric response properties of pseudo-cubic BaTiO3 nanostructures, Appl. Phys. A, 115 (2014) 1057–1067, doi: 10.1007/s00339-013-7941-7.
N. Masó, H. Beltrán, E. Cordoncillo, D. C. Sinclair, A. R. West, Polymorphism and dielectric properties of Nb-doped BaTiO3. J. Am. Ceram. Soc., 91 (2008) 144-150, doi: 10.1111/j.1551-2916.2007.02083.x.
F. D. Morrison, A. M. Coats, D. C. Sinclair, A. R. West, Charge compensation mechanisms in La doped BaTiO3, Journal of Electroceramics, 6 (2001) 219-232, doi: 10.1023/a:1011400630449.
D. Y. Lu, Study on the modification of barium titanate ceramic structure by lanthanide ions in the field of dielectric, Journal of jilin institute of chemical technology, 25 (2008) 34-41, doi: 10.16039/j.cnki.cn22-1249.2008.01.006.
Y. L. Li, Y. F. Qu, Dielectric properties and substitution mechanism of samarium-doped Ba0.68Sr0.32TiO3 ceramics, Materials Research Bulletin, 44 (2009) 82-85, doi: 10.1016/j.materresbull.2008.03.030.
C. Zhao, X. Y. Huang, H. Guan, C. H. Gao, Effect of Y2O3 and Dy2O3 on dielectric properties of Ba0.7Sr0.3TiO3 series capacitor ceramics, Journal of Rare Earths, 25 (2007) 197-200, doi: 10.1016/S1002-0721 (07) 60468-2.
W. Yang, A. M. Chang, B. C. Yang, Effect of grain size on dielectric and ferroelectric Properties of Ba0.80Sr0.20TiO3 ceramics, Journal of the Chinese Ceramic Society, 3 (2002) 390-397, doi: 10.3321/j.issn:0454-5648.2002.03.024.
Z. Li, P. Zhao, X. H. Xue, Z. T. Li, Z. Wang, L. Xu，H. Q. Fan, Structure and Electrical Properties of Bal-xSrxTiO3 Ceramics with Various Sintering Processes, Materials Review, 30 (2016) 55-59, doi: 10.11896/j.issn.1005-023X.2016.16.012.
Y. P. Pu, S. F. Ning, W. Chen, Influence of Dy2O3 doping on the structure and properties of BaTiO3 ceramics, Journal of Xi'an Jiao Tong University, 38 (2004) 424-427, doi: 10.3321/j.issn:0253-987X.2004.04.024.
F. Zhou, G. F. Liu, J. B. Wang, J. Li, X. B. Cao, Influence of doping on dielectric properties of barium strontium titanate ceramics, Insulating material, 42 (2009) 46-48, doi: 10.16790/j.cnki.1009-9239.im.2009.03.011.
C. Zhang, Y. F. Qu, Dielectric properties and phase transitions of La2O3 and Sb2O3 doped barium strontium titanate ceramics, Trans. Nonferrous Met. Soc. China, 22 (2012) 2742-2748, doi: 10.1016/S1003-6326 (11) 61527-6.
X. Y. Huang, R. K. XING, S. J. Guo, Influence of Nd2O3 content on the low temperature sintering of BST ceramic. Electronic Components and Materials, 33 (2014) 10-16, doi: 10.14106/j.cnki.1001-2028.2014.12.003.
W. Li, J. Qi, Y. Wang, L. Li, Z. Gui, Doping behaviors of Nb2O5 and Co2O3 in temperature stable BaTiO3 ceramics, Materials Letters, 57 (2002) 1-5, doi: 10.1016/S0167-577X (02) 00687-0.
B. Su, T. W. Button, Microstructure and dielectric properties of Mg-doped barium strontium titanate ceramics, Journal of Applied Physics, 95 (2004) 1382-1385, doi: 10.1063/1.1636263.
Y. Li, R. Wang, X. Ma, Z. Li, R. Sang, Y. Qu, Dielectric behavior of samarium doped BaZr0.2Ti0.8O3 ceramics, Materials Research Bulletin, 49 (2014) 601-607, doi: 10.1016/j.materresbull.2013.10.001.
C. Zhang, Z. X. Ling, G. Jian, F. X. Chen, Dielectric properties and point defect behavior of antimony oxide doped Ti deficient barium strontium titanate ceramics, Trans. Nonferrous Met. Soc. China, 27 (2017) 2656-2662, doi: 10.1016/S1003-6326 (17) 60294-2.
K. Wang, A. Hussain, W. Jo, J. Rodel, Temperature-dependent properties of (Bi1/2Na1/2) TiO3- (Bi1/2K1/2) TiO3- SrTiO3 lead-free piezoceramics, J. Am. Ceram. Soc., 95 (2012) 2241-2247, doi: 10.1111/j.1551-2916.2012.05162.x.
C. Zhang, Z. X. Ling, G. Jian, The defect chemistry and dielectric properties of Sb2O3 doped non- stoichiometric barium strontium titanate ceramics, J Mater Sci: Mater Electron, 27 (2016) 11770-11776, doi: 10.1007/s10854-016-5316-5.