Local Structure, Pseudosymmetry, and Phase Transitions in Na (1/2)(Bi 1/2)(iO3-K 1/2)(Bi 1/2)(TiO 3) Ceramics.

摘要

The structural behavior of ceramic solid solutions (1-x)Na Bi TiO3- xK Bi TiO3 (NBT-KBT) was studied using high-resolution powder diffraction and transmission electron microscopy. A temperature-independent morphotropic phase boundary (MPB) separating NBT-like pseudo-rhombohedral (R) and KBT-like pseudo- tetragonal (T) phases was observed at x0.2. For x.