Phase structure and piezoelectric properties of high Curie temperature BiYbO3– PbTiO –BaTiO ceramics 3 3
- F. Gao, R. Z. Hong, J. J. Liu, Z. Li, L. H. Cheng, C. S. Tian
- J. Allo. & Comp., vol. 475, pp. 619-623, May 2009
(1-x)Bi(Sc<inf>1-y</inf>Y<inf>y</inf>)O<inf>3</inf>-xPbTiO<inf>3</inf> (BSYPTx/y) ceramics were prepared by the conventional mixed oxide method. It was found that the morphotropic phase boundary (MPB) between rhombohedral and tetragonal phase of BSYPTx/y system was moved to the lower PT content with increasing of BiYO<inf>3</inf> content. The Curie temperature (T<inf>C</inf>) near MPB of BSYPTx/y ceramics was found to increase with increasing of BiYO<inf>3</inf> content. However, the piezoelectric properties (d<inf>33</inf> and k<inf>p</inf>) decreased with increasing of BiYO<inf>3</inf> content. BSYPTx/y ceramics with x = 0.56, y = 0.2 showed a high T<inf>C</inf> of 490 °C and a large d<inf>33</inf> of 147 pC/N.