American Journal of Nanosciences
Volume 3, Issue 2, June 2017, Pages: 24-29
Received: May 10, 2017;
Accepted: May 31, 2017;
Published: Jul. 4, 2017
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Tasmia Zaman, Department of Glass & Ceramic Engineering, Rajshahi University of Engineering & Technology (RUET), Rajshahi, Bangladesh
Mst. Sharmin Mostari, Department of Glass & Ceramic Engineering, Rajshahi University of Engineering & Technology (RUET), Rajshahi, Bangladesh
Md. Fakhrul Islam, Department of Glass and Ceramic Engineering, Bangladesh University of Engineering & Technology (BUET), Dhaka, Bangladesh
The research was done to understand the influence of nano-sized donar dopant incorporation in barium titanate (BTO) structure. Core-shell structures are stated to form while dopants are added directly to BTO. Low diffusivity of ions in solid state results such core-shell structures. Pure BTO was doped with different concentration of niobium oxide (Nb2O5) (0.2, 0.3 and 0.4 mol %). Single stage sintering at 1250°C, 1275°C and 1300°C was initially chosen. Soaking time was varied from 0 to 2 hours. Sintered samples were taken for further characterization. Percent theoretical density (%TD) of the sintered samples was measured. Microstructure of the sintered samples was revealed by Scanning Electron Microscope (SEM). Both temperature and frequency dependent dielectric property was measured using impedance analyzer. X-ray diffraction (XRD) and Differential Thermal Analysis (DTA) was also performed. XRD confirmed the diffusion of Nb5+ ions into the BTO lattice. While impedance analyzer and DTA proved the shifting of Curie temperature (TC) from ~120°C to ~71°C. Enhanced dielectric property was observed by the addition of Nb2O5.
Mst. Sharmin Mostari,
Md. Fakhrul Islam,
Incorporation of Donar Dopant on BaTiO 3 (BTO) Perovskite Structure, American Journal of Nanosciences.
Vol. 3, No. 2,
2017, pp. 24-29.
N. Ma, B. Zhang, W. Yang and D. Guo, “Phase structure and nano-domain in high performance of BaTiO3 piezoelectric ceramics,” Journal of the European Ceramic Society, vol. 32 (5), pp. 1059-1066, 2012.
S. Zhang, J. B. Lim, H. J. Lee and T. Shrout, “Characterization of hard piezoelectric lead-free ceramics, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, vol. 56 (8), pp. 1523-1527, 2009.
Y. Huan, X. Wang, J. Fang and L. Li, “Grain size effect on piezoelectric and ferroelectric properties of BaTiO3 ceramics, Journal of the European Ceramic Society, vol. 34 (5), pp. 1445-1448, 2014.
M. Drofenik, “Origin of the grain growth anomaly in donor-doped barium titanate,” Journal of the American Ceramic Society, vol. 76 (1), pp. 123-128, 1993.
P. Saxena, A. Kumar, P. Sharma and D. Varshney, “Improved dielectric and ferroelectric properties of dual-site substituted rhombohedral structured BiFeO3 multiferroics,” Journal of Alloys and Compounds, vol. 682, pp. 418-423, 2016.
M. Hasan, M. Basith, M. Zubair, M. S. Hossain, R. Mahbub, M. Hakim and M. F. Islam, “Saturation magnetization and band gap tuning in BiFeO3 nanoparticles via co-substitution of Gd and Mn,” Journal of Alloys and Compounds, vol. 687, pp. 701-706, 2016.
Sharma P., Kumar P., Kundu R. S., Ahlawat N. &Puniah R. (2016), Enhancement in magnetic, piezoelectric and ferroelectric properties on substitution of titanium by iron in barium calcium titanate ceramics, Ceramics International, 42, 12167-12171.
M. Chandrasekhar and P. Kumar, “Synthesis and characterizations of BNT-BT and BNT-BT-KNN ceramics for actuator and energy storage applications,” Ceramics International, vol. 41, pp. 5574-5580, 2016.
H. H. Kniepkamp and W. Heywang, “Depolarization effects in Polycrystalline, BaTiO3,” Z. Angrew. Physics, vol. 6, pp. 385-390, 1954.
A. S. Shaikh, R. W. Vest, and G. M. Vest, “Dielectric properties of ultra-fine grained BaTiO3,” In: IEEE International Svmosium on Applied Ferroelectrics, vol. 6, pp. 126-129, 1986.
M. N. Rahman and R. Manalert, “Grain boundry mobility of BaTiO3 doped with aliovalent cations,” Journal of European Ceramic Society, vol. 18, pp. 1063-1071, 1988.
H. T. Martirena and J. C. Burfoot, “Grain-size effects on properties of some ferroelectrics ceramics, Journal of Physics Society, vol. 7, pp. 3182- 92, 1974.
V. V. Mitic and I. Mitrovic, “The influence of Nb2O5 on BaTiO3 ceramics dielectric properties,” Journal of American Ceramic Society, vol. 21, pp. 2693-2696, 2001.
K. Kinoshinta and A. Yamaji, “Grain-size effects on dielectric properties in barium titanate,” Journal of Applied Physics, vol. 47, p. 371-74, 1976.
G. H. Jonkkr and W. Noorland, “Grain size of sintered barium titanate,” In: Science of Ceramics, Academic Press, London, pp. 255-64, 1962.
Y. Kumar et al., “Effect of Ni doping in structural and dielectric properties of BaTiO3,” Indian Journal of Engineering and Materials Science, vol. 16, pp. 390-394, 2009.
S. Yasmin, S. Choudhury, M. A. Hakim, A. H. Bhuiyan and M. J. Rahman, “Structural and dielectric properties of pure and cerium doped barium titanate,” Journal of Ceram. Processing Research, vol. 12 (4), pp. 387-391, 2011.
Y. Yuan, S. R. Zhang, X. H. Zhou and B. Tang, “Effects of Nb2O5 doping on the microstructure and the dielectric temperature characteristics of barium titanate ceramics,” J Mater Sci, vol. 44, pp. 3751-3757, 2009.
H. Yassen, S. Baltianski and Y. Tsur, “Effect of incorporating method of niobium on the properties of doped Barium Titanate Ceramics,” Journal of American Ceramic Society, vol. 89 (5), pp. 1584-1589, 2006.
P. Babilo and S. M. Haile, “Enhanced sintering of Yuttrium-doped barium zirconate by addition of ZnO,” Journal of American Ceramic Society, vol. 88 (9), pp. 2362-2368, 2005.
Y. J. Kim et al., “Microstructural characterization and dielectric properties of barium titanate solid solution with donor dopants,” Bulletin of Korean Chemical Society, vol. 30 (6), pp. 1268-1273, 2009.
R. T. Armstrong, E. L. Morgens, K. A. Maurice and C. R. Buchanan, “Effects of zirconia on microstructure and dielectric properties of barium titanate ceramics,” Journal of American Ceramic Society, vol. 4, pp. 605-611, 1989.
J. Tangsritrakul and R. Yimnirun, “Effects of manganese addition on phase formation and microstructure of barium titanate ceramics,” Chiang Mai Journal of Science, vol. 37 (1), pp. 165-169, 2010.
X. Liang, Z. Meng and W. Wu, “Effect of acceptor and donor dopants on the dielectric and tunable properties of barium strontium titanate,” Journal of American Ceramic Society, vol. 86 (12), pp. 2218-2222, 2004.