Isotope effect on displacive-type ferroelectric-phase-transition temperatures

1990 ◽  
Vol 41 (13) ◽  
pp. 9581-9584 ◽  
Author(s):  
A. Bussmann-Holder ◽  
H. Büttner
Keyword(s):  
Phase Transition ◽  
Isotope Effect ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Transition Temperatures ◽  
Phase Transition Temperatures ◽  
Displacive Type

Ferroelectric phase transition temperatures of self-flux-grown RbTiOPO4 crystals

2004 ◽  
Vol 26 (4) ◽  
pp. 465-470 ◽  
Author(s):  
M. Roth ◽  
N. Angert ◽  
M. Tseitlin ◽  
G. Schwarzman ◽  
A. Zharov
Keyword(s):  
Phase Transition ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Transition Temperatures ◽  
Phase Transition Temperatures

Electrical Properties of Pb(Mg1/3Nb2/3)-PbTiO3 Ferroelectric Single Crystal

2009 ◽  
Vol 421-422 ◽  
pp. 419-422
Author(s):  
Ghulam Shabbir ◽  
Seiji Kojima
Keyword(s):  
Phase Transition ◽  
Electrical Properties ◽  
Single Crystal ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Charge Carriers ◽  
Frequency Range ◽  
Thermally Activated ◽  
Phase Transition Temperatures ◽  
Ferroelectric Single Crystal

The electrical properties of [001]-oriented morphotropic phase boundary (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-33%PT) single crystal have investigated as a function of temperature and frequency. The ac-conductivity exhibited continuous dispersion at all temperatures and frequency range examined and was associated to the thermally activated space charge carriers and local off-centering of Ti4+ and Pb2+ ions. The variations in ferroelectric phase transition temperatures observed in the poled state were associated to the polarization fluctuations and phase co-existence.

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.

Ti-isotope effect on ferroelectric phase transition of PbTiO3

1998 ◽  
Vol 217 (1) ◽  
pp. 189-194 ◽  
Author(s):  
Hirotake Shigematsu ◽  
Takatoshi Futatsugi ◽  
Tsuneo Matsui
Keyword(s):  
Phase Transition ◽  
Isotope Effect ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase

scholarly journals The influence of BaGeO3 on the properties of Ba(Ti1−xSx)O3 ceramics on the basis of sol-gel powders

2019 ◽  
Author(s):  
Roberto Köferstein
Keyword(s):  
Phase Transition ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Sintering Temperature ◽  
Sol Gel ◽  
Synthesis Method ◽  
Particle Sizes ◽  
Dielectric Measurements ◽  
Sintering Additive ◽  
Phase Transition Temperatures

Ba(Ti1−x−y SnxGey )O3 (BTSG-x-y; x = 0, 0.05; y = 0–0.05) powders were synthesized by a sol-gel (SG) method and for comparative purposes also by a mixed-oxide (MO) method. In this system, BaGeO3 functions as sintering additive. Due to smaller particle sizes of the SG powders a higher sintering activity was found, which resulted in reduced grain growth and in a more homogenous grain size distribution for the corresponding ceramics. The dependence on the paraelectric ⇆ ferroelectric phase transition, i.e. the phase transition temperature, thewidth of the transition region and completeness were examined by dielectric measurements,DTA as well as by SEM, EDX and XRD investigations with respect to the BaGeO3 content, synthesis method and sintering temperature. The phase transition temperatures of the SG ceramics are remarkably higher than those of the MO ceramics with the same nominal compositions. The reason is a lower tin concentration within the grains of SG ceramics as confirmed by EDX and XRD investigations. The presence of BaGeO3 in barium titanate–stannate system on the basis of a SG method caused an improved incorporation of tin in theBaTiO3 lattice.

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