ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Lead-free piezoelectric ceramics based on bismuth sodium titanate (BNT) -barium hafnatetitanate (BHT) were prepared by a two-step synthesis process. The final BNT-BHT ceramics sinteredat 1180oC for 2 h in air showed a perovskite structure with high density. The morphotropic phaseboundaries (MPB) were found in BNT based piezoelectric ceramics with 8~10 wt% BHT incomposites. In the case of Bi0.5Na0.5TiO3-0.08BaHf0.05Ti0.95O3 ceramics, a maximum piezoelectriccoefficient d33 of 122.6 pC/N was obtained. The remnant polarization (Pr) and coercive field (Ec) weremeasured and the relationship between ferroelectricity and the BHT fraction in the compounds wasinvestigated. The BNT-BHT ceramics were expected to be a new and promising candidate forlead-free piezoelectric device applications
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.334-335.957.pdf
Permalink