Influence of Lanthanum on the Microstructural and Dielectric Properties of Polycrystalline Ba(Ti0.5Fe0.5)O3
M. R. Shah1**,A. K. M. Akther Hossain2
1Department of Physics, Primeasia University, Banani, Dhaka-1213, Bangladesh 2Department of Physics, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh
Influence of Lanthanum on the Microstructural and Dielectric Properties of Polycrystalline Ba(Ti0.5Fe0.5)O3
M. R. Shah1**,A. K. M. Akther Hossain2
1Department of Physics, Primeasia University, Banani, Dhaka-1213, Bangladesh 2Department of Physics, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh
摘要Various polycrystalline Ba1−xLax(Ti0.5Fe0.5)O3 are prepared by using the standard solid state reaction technique. Pellet shaped samples prepared from each composition are sintered at 1200°C for 5 h. X-ray diffraction patterns of these compositions confirm the formation of a single phase perovskite structure. The lattice parameters are decreased but the average grain size increases with the increase of La content. The dielectric constant, dielectric loss and ac conductivity are studied as a function of frequency for various compositions, and their behaviors are explained on the basis of the Maxwell–Wagner model. A three-times enhancement of the dielectric constant is observed with the increase of La content.
Abstract：Various polycrystalline Ba1−xLax(Ti0.5Fe0.5)O3 are prepared by using the standard solid state reaction technique. Pellet shaped samples prepared from each composition are sintered at 1200°C for 5 h. X-ray diffraction patterns of these compositions confirm the formation of a single phase perovskite structure. The lattice parameters are decreased but the average grain size increases with the increase of La content. The dielectric constant, dielectric loss and ac conductivity are studied as a function of frequency for various compositions, and their behaviors are explained on the basis of the Maxwell–Wagner model. A three-times enhancement of the dielectric constant is observed with the increase of La content.
(Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)
引用本文:
M. R. Shah**,A. K. M. Akther Hossain. Influence of Lanthanum on the Microstructural and Dielectric Properties of Polycrystalline Ba(Ti0.5Fe0.5)O3[J]. 中国物理快报, 2012, 29(4): 47803-047803.
M. R. Shah**,A. K. M. Akther Hossain. Influence of Lanthanum on the Microstructural and Dielectric Properties of Polycrystalline Ba(Ti0.5Fe0.5)O3. Chin. Phys. Lett., 2012, 29(4): 47803-047803.
[1] Valasek J 1921 Phys. Rev. 17 475[2] Haertling G H 1999 J. Am. Ceram. Soc. 82 797[3] Cohen R E and Krakauer H 1992 Ferroelectrics 136 65[4] Setter N, Damjanovic D, Eng L, Fox G, Gevorgian S et al 2006 J. Appl. Phys. 100 051606[5] Cohen R E 2000 J. Phys. Chem. Sol. 61 139[6] Ichinose N, Miyamoto N and Takashi S 2004 J. Eur. Ceram. Soc. 24 1681[7] Tressler J F, Alkoy S and Newnham R E 1998 J. Electroceram 2 257[8] Wang Y, Yong Xiang L, Dong W and Qing Rui Y 2006 Chin. Phys. Lett. 23 2232[9] Du H, Zhou W, Luo F and Zhu D 2007 Appl. Phys. Lett. 91 202907[10] Lily, Kumari K, Prasad K and Choudhary R N P 2008 J. Alloy. Com. 453 325[11] Mendelson M I 1969 J. Am. Ceram. Soc. 52 443[12] Jung Y S, Na E S, Paik U, Lee J and Kim J 2002 Mater. Res. Bull. 37 1633[13] Watanabe K, Ohsato H, Kishi H, Okino Y et al 1998 Solid State Ionics 108 129[14] Peng F, Xu Z, Chu R, Li W, Zang G and Hao J 2010 Mater. Chem. Phys. 124 1065[15] Zhang J, Zhai J, Chou X and Yao X 2008 Mater. Chem. Phys. 111 409[16] Shan D, Qu Y F and Song J J 2007 Solid State Commun. 141 65[17] Abdeen A M, Hemeda O M, Assem E E and El Sehly M M 2002 J. Magn. Magn. Mater. 238 75[18] Chung C Y, Chang Y H and Chen G J 2004 J. Appl. Phys. 96 6624[19] Haque M M, Huq M and Hakim M A 2008 Mater. Chem. Phys. 112 580[20] Koops C G 1951 Phys. Rev. 83 121[21] Wagner K W 1973 Am. Phys. 40 317[22] Wang X X, Choy S H, Tang X G and Chan H L W 2005 J. Appl. Phys. 97 104101
2012, Vol. 29 
