Paper Title:
Relaxor Ferroelectricity and Electrostrictive Behavior of KNN-ST Ceramics
  Abstract

The new electrostrictive ceramics have been produced from the (1-x) K0.5Na0.5NbO3-xSrTiO3 (KNN-ST, x=0.1-0.25) system by using conventional mixed-oxide methods. Sintering temperatures rise with increasing SrTiO3 content (x=0.1-0.25) and are in a very narrow range. The x-ray diffraction patterns indicate that with the increasing of SrTiO3 up to 0.25, KNN-ST ceramics with a single perovskite structure exhibit a transition from orthorhombic to cubic and no other impure phase appeared. The dielectric and relaxor ferroelectric properties of KNN-ST ceramics are investigated with the different SrTiO3 content. Also, the strain of these ceramics induced by applied electric fields have been studied. The electrostrictive response is similarly as in the classical PMN (lead magnesium niobate), but lower (order of the 10-5) than PMN (order of the 10-3). Furthermore, this system shows translucent, high dielectric constant, thus suggests possible applications in electric-optic devices, electromechanical transducer applications.

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
1978-1981
DOI
10.4028/www.scientific.net/MSF.654-656.1978
Citation
H. Q. Fan, Z. Li, P. R. Ren, G. C. Jiao, "Relaxor Ferroelectricity and Electrostrictive Behavior of KNN-ST Ceramics", Materials Science Forum, Vols. 654-656, pp. 1978-1981, 2010
Online since
June 2010
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