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The Structure and the Electrical Properties of Pb0.95La0.05[ZrxTi(0.95–x)(Mo1/3,In2/3)0.05]0.9875O3 Ferroelectric Ceramics

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DOI: 10.4236/msa.2011.29162    3,458 Downloads   6,574 Views   Citations


The structural, the dielectric, and the piezoelectric properties of new ferroelectric Pb0.95La0.05[ZrxTi(0.95–x)(Mo1/3,In2/3)0.05]0.9875O3(0.46 ≤ x ≤ 0.55) ceramics have been investigated. All the samples were being sintered at a temperature ranging from 1000 to 1180℃ after being compacted in circular discs. The detailed structural and ferroelectric properties were carried out for sintered specimens. The results of X-ray diffraction showed that all the ceramics specimens have a perovskite phase. The phase structure of Pb0.95La0.05[ZrxTi(0.95–x)(Mo1/3,In2/3)0.05]0.9875O3 ceramics was transformed from the tetragonal to the rhombohedral, with an increase in the ratio of Zr/Ti in system. In the present system the MPB that coexists with the tetragonal and rhombohedral phases is a narrow composition region of x = 0.50 – 0.51. The scanning Electron Microscopy (SEM) showed an increase of the mean grain size when the sintering temperature was increased. The dielectric constant ε and the coupling factor Kp reached the maximum values, while the mechanical quality factor Qm and the loss tangent reached the lowest values when x = 0.50. For the composition where x = 0.50, these properties include ε = 5414 (at the Curie temperature), tangδ = 0.039, Kp = 0.67, Qm = 20 and a Curie temperature of 335℃.

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M. Abba and A. Boutarfaia, "The Structure and the Electrical Properties of Pb0.95La0.05[ZrxTi(0.95–x)(Mo1/3,In2/3)0.05]0.9875O3 Ferroelectric Ceramics," Materials Sciences and Applications, Vol. 2 No. 9, 2011, pp. 1199-1204. doi: 10.4236/msa.2011.29162.


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