Changes of the crystal structure at the relaxor ferroelectric phase transition of strontium barium niobate (SBN53)

2014 ◽  
Vol 49 (1) ◽  
pp. 63-69 ◽  
Author(s):  
H. A. Graetsch
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Relaxor Ferroelectric ◽  
Strontium Barium Niobate ◽  
Strontium Barium

Incommensurate modulations of relaxor ferroelectric Ca0.24Ba0.76Nb2O6(CBN24) and Ca0.31Ba0.69Nb2O6(CBN31)

2014 ◽  
Vol 70 (4) ◽  
pp. 743-749 ◽  
Author(s):  
Heribert A. Graetsch ◽  
Chandra Shehkar Pandey ◽  
Jürgen Schreuer ◽  
Manfred Burianek ◽  
Manfred Mühlberg
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Tungsten Bronze ◽  
Orthorhombic Phase ◽  
Relaxor Ferroelectric ◽  
Tetragonal Symmetry ◽  
Tetragonal Tungsten Bronze

CBN crystals show a one- and a two-dimensionally modulated modification. The former is isotypic with orthorhombic Ba4Na2Nb10O30and the latter with the tetragonal tungsten bronze type of crystal structure. The orthorhombic form irreversibly transforms to the tetragonal polymorph at the ferroelectric phase transition near 603 K. Orthorhombic and tetragonal CBN24 slightly differ in the distribution of the Ba and Ca atoms over the incompletely filled Me1 and Me2 sites. The tetragonal symmetry is further broken in orthorhombic CBN24 by different amplitudes of the positional modulations of O atoms which are symmetrically equivalent in the TTB structure. A similar orthorhombic phase of CBN31 could be obtained by quenching from 1473 K.

Tuning the ferroelectric phase transition of PVDF by uniaxially stretching crosslinked PVDF films with CFCH bonds

2020 ◽  
Vol 8 (33) ◽  
pp. 11426-11440
Author(s):  
Xiao Wang ◽  
Baobao Qiao ◽  
Shaobo Tan ◽  
Weiwei Zhu ◽  
Zhicheng Zhang
Keyword(s):  
Phase Transition ◽  
Ferroelectric Phase Transition ◽  
Vinylidene Fluoride ◽  
Ferroelectric Phase ◽  
Relaxor Ferroelectric ◽  
Artificial Muscles ◽  
Ferroelectric Polymers ◽  
Poly Vinylidene Fluoride ◽  
Electrostrictive Properties

Poly(vinylidene fluoride) (PVDF) based relaxor ferroelectric polymers show great potential for applications in transducers, sensors and artificial muscles for their excellent electrostrictive properties.

Features of Crystal Structure and Ferroelectric Phase Transitions of KTiOPO4 Doped with Nb and Sb

2004 ◽  
Vol 443-444 ◽  
pp. 303-306
Author(s):  
S.A. Ivanov ◽  
Sergei Yu. Stefanovich ◽  
S.-G. Eriksson ◽  
V.I. Voronkova ◽  
T.Yu. Losevskaya ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Structural Features ◽  
Neutron Powder Diffraction ◽  
Compositional Variation ◽  
Phase Transition Temperatures ◽  
Linear Optical Properties ◽  
Ferroelectric Phase Transitions

The evolution of the crystal structures as a function of temperature of the new solid- solution KTiOPO4 (KTP) isomorphs, namely K1-xNbxTi1-xOPO4 and K1-xSbxTi1-xOPO4 have been studied by neutron powder diffraction below and above the ferroelectric phase transition temperatures. On the basis of the experimental data obtained the cation distribution, among the sublattices of this structure, and the distortion of the framework at the phase transition, have been discussed. The possible correlation between the non-linear optical properties and the dominant structural features tailored by compositional variation has also been studied.

Field-induced sharp ferroelectric phase transition in Sr0.66Ba0.34Nb2O6 relaxor ferroelectric

2001 ◽  
Vol 79 (17) ◽  
pp. 2800-2802 ◽  
Author(s):  
I. A. Santos ◽  
D. Garcia ◽  
J. A. Eiras ◽  
E. R. Manoel ◽  
A. C. Hernandes
Keyword(s):  
Phase Transition ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Relaxor Ferroelectric

Crystal Structure and the Paraelectric-to-Ferroelectric Phase Transition of Nanoscale BaTiO3

2008 ◽  
Vol 130 (22) ◽  
pp. 6955-6963 ◽  
Author(s):  
Millicent B. Smith ◽  
Katharine Page ◽  
Theo Siegrist ◽  
Peter L. Redmond ◽  
Erich C. Walter ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase
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