MPB Phase Diagram and Ferroelectric Properties in the PbTiO 3 -BiScO 3 System.
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| Title: | MPB Phase Diagram and Ferroelectric Properties in the PbTiO 3 -BiScO 3 System. |
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| Authors: | Shimojo, Y.1, Wang, R.1, Sekiya, T.1, Cross, L.E.2, Nakamura, T.1 |
| Source: | Ferroelectrics. 2003, Vol. 284 Issue 1, p121. 8p. |
| Subjects: | Perovskite, Temperature, Ferroelectricity, Dielectric measurements |
| Abstract: | Perovskite solid solutions (1 - x )PbTiO 3 (PT)- x BiScO 3 (BS) were prepared under ordinary pressure. Single phase tetragonal perovskite was obtained up to the composition x = 0.375, and morphotropic phase boundary (MPB) from tetragonal to rhombohedral phase was also situated on this composition. The dielectric measurements suggested existence of critical compositions around both x = 0.15 and x = 0.3. The Curie temperature ( T c ) was higher than that of PT at x = 0.1-0.2. Below and above x = 0.3, the dielectric constant at T c increased and decreased with increasing BS content, respectively. These dielectric behaviors seemed to be associated with the connectivity of TiO 6 octahedron and ScO 6 octahedron in the perovskite structure. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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