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:
(Na0.5Bi0.5)TiO3 (BNT) system ceramics are considered to be an excellent candidate for leadfreepiezoelectric ceramics. In this paper, (1–x)Na0.5Bi0.5TiO3-xBaTiO3 (x = 0.03 ~ 0.10) was synthesizedby conventional mixed-oxide technique. The powders were calcined at 950oC for 2 h and the presseddisks were sintered at 1145oC for 2 h in air atmosphere. The phase structure was investigated by X-raydiffraction technique (XRD). It is revealed that the morphotropic phase boundary (MPB) lies in a narrowcomposition range of x=0.05–0.08 but not a unique composition (x = 0.055 or 0.06) as shown before [1-4].The microstructures of the ceramics were investigated by scanning electron microscopic. In addition, thepiezoelectric and dielectric properties of this system were also investigated. It was indicated that both thepiezoelectric and dielectric properties are better with the compositions lie near the tetragonal phase withinthe MPB than that whose compositions lie near the rhombohedral phase
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.206.pdf
