Processing and Properties of Textured Bismuth Layer-Structured Ferroelectrics

Abstract

Bismuth layer-structured ferroelectrics (BLSFs) are one of the candidates for lead-free piezoelectrics for high temperature and high frequency applications. BLSFs have a layer structure with a general formula (Bi 2 O 2 )(A mÀ1 B m O 3m+1 ), where A denotes mono-, di-, or trivalent ions with a large ionic radius, and B denotes tetra-, penta-, or hexavalent ions with a small ionic radius, and m is an integer between 1 and 5. The crystal structure is composed of pseudo-perovskite blocks (A mÀ1 B m O 3m+1 )

Role of Alumina in the Preparation of Platelike NaNbO3 Powder by Molten Salt Synthesis and Proposal of New Preparation Method

“…When textured ceramics are prepared by a templated grain growth process, anisometric powders are necessary . In the case of (K,Na)NbO 3 ‐based materials, platelike NaNbO 3 powder is generally used .…”

Quasi-Equilibrium, Multifoil Platelets of Copper- and Titanium-Substituted Bismuth Vanadate, Bi2V0.9(Cu0.1−xTix)O5.5−δ, by Molten Salt Synthesis

“…The bottom row represents BICUVOX. In general, particles of Aurivillius-type, bismuth, layered-structure compounds are expected to have atomically smooth (00l) faces and atomically rough (hk0) faces [44], so high surface area sites nucleate along the propagating edge of a platelet ( Figure 10B). During Ostwald ripening, a kinetic restriction (surface diffusion) regulates the growth of the platelets but does not affect the 2D-nucleation rates for the ledge generation.…”