WJNSE  Vol.3 No.3 , September 2013
The Effects of Annealing Process on Dielectric and Piezoelectric Properties of BMT-Base Lead-Free Ceramics
ABSTRACT
By using nitric acid as the fuel, the lead-free ceramic of Ba(Ti1-x,Mgx)O3 (x = 0.31) was prepared by auto combustion method (ACM). To make a comparison, this ceramic was also prepared using mixed oxide method (MOM). By X-ray diffraction, the phase structures of two samples were studied, and the results showed that rising temperatures would reduce unwanted phases. The piezoelectric and electrical properties as a function of calcination and sintering temperatures were investigated. The results showed that the outstanding electrical properties were obtained for nanoceramic with this composition. The SEM image of the grain size was estimated around 2 micrometers, and the grain size increased with the increasing of sintering temperature for two samples. The curie temperature of the BMT-ACM was 126°C and it’s significantly larger than the curie temperature of BMT-MOM which was 118°C. The results of electrical properties emphasized that the synthesis optimum temperature for two samples was about 1200°C and it was the best temperature that led to improved properties such as dielectric constant, polarization and piezoelectric coefficients.

Cite this paper
M. Ghasemifard, M. Daneshvar and M. Ghamari, "The Effects of Annealing Process on Dielectric and Piezoelectric Properties of BMT-Base Lead-Free Ceramics," World Journal of Nano Science and Engineering, Vol. 3 No. 3, 2013, pp. 100-107. doi: 10.4236/wjnse.2013.33014.
References
[1]   W. Maison, S. Ananta, T. Tunkasiri, P. Thavornyutikarn and S. Phanichphant, “Effect of Calcination Temperature on Phase Transformation and Particle size of Barium Titanate Fine Powders Synthesized by the Catecholate Process,” Science Asia, Vol. 27, No. 4, 2001, pp. 239-243. doi:10.2306/scienceasia1513-1874.2001.27.239

[2]   M. Ghasemifard, “Dielectric, Piezoelectric and Electrical Study of 0.65PMN-0.20PZT-0.15PT Relaxor Ceramic,” The European Physical Journal Applied Physics, Vol. 54, No. 2, 2011, pp. 20701-20707. doi:10.1051/epjap/2011100495

[3]   B. Jaffe and W. R. Cook, “Piezoelectric Ceramics,” Academic Press, London and New York, 1971.

[4]   W. Maison, R. Kleeberg, R. B. Heimann and S. Phanichphant, “Phase Content, Tetragonality, and Crystallite Size of Nanoscaled Barium Titanate Synthesized by the Catecholate Process: Effect of Calcinations Temperature,” Journal of the European Ceramic Society, Vol. 23, No. 1, 2003, pp. 127-132. doi:10.1016/S0955-2219(02)00071-7

[5]   W. Heywang, “Barium Titanate as a PTC Thermistor,” Solid-State Electronics, Vol. 3, No. 1, 1961, pp. 51-58. doi:10.1016/0038-1101(61)90080-6

[6]   W. Heywang, “Resistivity Anomaly in Doped Bariumtitanate,” Journal of the American Ceramic Society, Vol. 47, No. 10, 1964, pp. 484-490. doi:10.1111/j.1151-2916.1964.tb13795.x

[7]   B. Huybrechts, K. Ishizaki and M. Takata, “The Positive temperature Coefficient of Resistivity in Barium Titanate,” Journal of Materials Science, Vol. 30, No. 10, 1995, pp. 2463-2474. doi:10.1007/BF00362121

[8]   M. S. H. Chu and C. E. Hodgkins, “Multilayer Ceramic Devices,” Advanced Ceramic, Vol. 19, 1986, pp. 203-207.

[9]   C. Y. Chen and W. H. Tuan, “Mechanical and Dielectric Properties of BaTiO3/Ag Composites,” Journal of Materials Science Letters, Vol. 18, No. 5, 1999, pp. 353-354. doi:10.1023/A:1006612129503

[10]   C. Pecharroman and J. S. Moya, “Experimental Evidence of a Giant Capacitance in Insulator-Conductor Composites at the Percolation Threshold,” Advanced Materials, Vol. 12, No. 4, 2000, pp. 294-297.

[11]   M. Alguero, A. Moure, L. Pardo, J. Holc and M. Kosec, “Processing by Mechano Synthesis and Properties of Piezoelectric Pb(Mg1/3Nb2/3)O3-PbTiO3 with Different Compositions,” Acta Materialia, Vol. 54, No. 3, 2006, pp. 501-511. doi:10.1016/j.actamat.2005.09.020

[12]   R. L. Coble, “Grain Growth in Sintered ZnO and ZnO-Bi2O3 Ceramics,” Journal of Applied Physics, Vol. 56, 1985, pp. 131-141.

[13]   K. Kakegawa and J. Mohri, “A Compositional Fluctuation and Proporties of Pb(Zr,Ti)O3,” Solid State Communications, Vol. 24, No. 11, 1977, pp. 769-772. doi:10.1016/0038-1098(77)91186-3

[14]   K. Carl and K. H. Hardtl, “Composition Dependences in Solid Solution on the Basis of Lead-Zirconate-Titanate and Sodium Niobate,” Physica Status Solidi (a), Vol. 8, No. 1, 1971, pp. 87-91. doi:10.1002/pssa.2210080108

[15]   K. Okazaki and K. Nagata, “Effects of Grain Size and Porosity on Electrical and Optical Properties of PLZT Ceramics,” Journal of the American Ceramic Society, Vol. 56, No. 2, 1973, pp. 82-86. doi:10.1111/j.1151-2916.1973.tb12363.x

 
 
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