In situ transmission electron microscopy study on Nb-doped Pb(Zr 0.95 Ti 0.05)O3 ceramics.
The ferroelectric-to-ferroelectric phase transition between the high temperature (FE(RH)) and the low temperature (FE(RL)) rhombohedral phases in a Nb-doped Pb(Zr(0.95)Ti(0.05))O(3) ceramic was investigated with transmission electron microscopy (TEM). Both bright field images and electron diffraction patterns were monitored as a function of temperature as well as dc electric field. A special TEM specimen holder that permits the application of electric voltage up to 600 V was employed for the study of electric field-induced phase transition. It was found that both [1/2](011)(c)- and [1/2](111)(c)-type superlattice diffraction spots were present at room temperature when the specimen was under no electric field. The [1/2](111)(c)-type superlattice spots were observed to disappear during heating above the phase transition temperature. When dc electric fields were applied at room temperature, the [1/2](111)(c)-type superlattice spots vanished as the electric field-induced FE(RL) --> FE(RH) phase transition occurred.
Qu
Weiguo
W
Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011, USA.
Tan
Xiaoli
X
Yang
Pin
P
D002516:Ceramics / Q000737:chemistry*; D007854:Lead / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure*; D044367:Phase Transition; D013696:Temperature; D014025:Titanium / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
C065536:lead titanate zirconate; D007854:Lead; D015040:Zirconium; D014025:Titanium