Abstract
Crystal structure and piezoelectric property of the system Pb(Zn1/3Nb2/3)O3-PbTiO3 were studied with single crystals and ceramic polycrystals. A PbO-flux method was used for growing the single crystals. Pure Pb(Zn1/3Nb2/3)O3 single crystal has perovskite structure of rhombohedral system. The crystal structure changes to tetragonal when dissolved PbTiO3 exceeds 10 mol %. Piezoelectric activity increases remarkably in the composition range where the phase change is observed i.e., the electromechanical coupling factor k33 amounts to 75% and the dielectric constant e33 is 4200. These tendencies are similar to those in the solid solution PbZrO3-PbTiO3.Pb(Zn1/3Nb2/3)O3 ceramic polycrystal has a pyrochlore structure and shows undetectable piezoelectricity. A compound of perovskite structure and that of pyrochlore structure coexist in specimens containing less than 40 mol% PbTiO3. The coexistence gives rise to extremely low piezoelectric activity.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Journal of the Japan Society of Powder and Powder Metallurgy
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.