Title :
Reconstruction of the field-induced transformation strain in {001} pseudocubic oriented Bi0.5Na0.5TiO3-7BaTiO3-2K0.5Na0.5TiO3 bulk ceramics
Author :
Fancher, Chris M. ; Blendell, J.E. ; Bowman, Keith J.
Author_Institution :
Sch. of Mater. Eng., Purdue Univ., West Lafayette, IN, USA
Abstract :
The high strain response of {001} oriented Bi0.5Na0.5TiO3-7BaTiO3-2K0.5Na0.5NbO3 is ascribed to a pseudocubic to tetragonal electric-field-induced phase transformation. Using in situ electric field dependent X-ray diffraction the macroscopic strain response can be reconstructed from the observed peak shift and peak bifurcation due to phase transformation. A volume averaging of the lattice strain of Bi0.5Na0.5TiO3-7BaTiO3-2K0.5Na0.5NbO3 estimates a maximum macroscopic strain response of 0.65% compared to 0.48% from macroscopic measurements.
Keywords :
X-ray diffraction; barium compounds; bifurcation; bismuth compounds; crystal orientation; ferroelectric ceramics; ferroelectric transitions; potassium compounds; sodium compounds; Bi0.5Na0.5TiO3-BaTiO3-K0.5Na0.5TiO3; X-ray diffraction; bifurcation; bulk ceramics; field-induced transformation strain; in situ electric field; lattice strain; macroscopic strain response; pseudocubi-tetragonal electric-field-induced phase transformation; {001} pseudocubic orientation; Ceramics; Electric variables measurement; Phase measurement; Strain; Strain measurement; Lead-free ferroelectric; field-induced phase transformation; preferred orientation;
Conference_Titel :
Applications of Ferroelectric and Workshop on the Piezoresponse Force Microscopy (ISAF/PFM), 2013 IEEE International Symposium on the
Conference_Location :
Prague
DOI :
10.1109/ISAF.2013.6748699
