1. New Piezoelectric Oxide Materials P. Shiv Halasyamani (Univ
New Piezoelectric Oxide Materials P. Shiv Halasyamani (Univ. Houston), AC10 PRF
Piezoelectric materials have the unique property of converting electrical energy to mechanical energy as well as mechanical energy to electrical energy.
Piezoelectric materials also have strict symmetry requirements – they must be crystallographically non-centrosymmetric and ideally polar.
New polar oxides may be synthesized by utilizing cations susceptible to second-order Jahn-Teller (SOJT) distortions. These cations are d0 transition metals (Ti4+, Nb5+, W6+, etc.) and lone-pair cations (Se4+, Te4+, Tl+, etc.).
Using this methodology, we have synthesized and characterized a variety of new polar oxides, including KNbW2O9, RbNbW2O9, and TlNbW2O9.