In:
Journal of Materials Research, Springer Science and Business Media LLC, Vol. 30, No. 6 ( 2015-03-28), p. 782-790
Abstract:
0.7(0.1BiYbO 3 -0.9PbTiO 3 )-0.3 Pb(Mg 1/3 Nb 2/3 )O 3 (0.7BYPT-0.3PMN) ternary piezoelectric ceramics were prepared by a columbite precursor method. The effects of sintering temperature on the crystalline phase, microstructure, and electrical properties of the ceramics were systematically investigated. There were two phases coexisting in the 0.7BYPT-0.3PMN ceramics sintered at 1100–1250 °C, one is the perovskite host phase with tetragonal symmetry and the other is Yb 2 Ti 2 O 7 impurity phase. It was observed that, with increasing sintering temperature, the piezoelectric constant d 33 , dielectric constant ε r , planar electromechanical coupling coefficient k p , and Curie temperature T C increased initially and then decreased. An apparent structure distortion could also be observed in samples synthesized at high sintering temperature due to the severe volatilization of Pb and Bi. The optimum performances of the material were obtained for samples sintered at 1150 °C with d 33 = 100 pC/N, ε r = 494, k p = 25.4%, and T C = 380 °C, respectively. It can be ascribed to the combined effect of a higher density, structural homogeneity with decreased tetragonality as well as a small amount of pyrochlore phase.
Type of Medium:
Online Resource
ISSN:
0884-2914
,
2044-5326
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2015
detail.hit.zdb_id:
54876-5
detail.hit.zdb_id:
2015297-8
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