Results 141 to 150 of about 63,457 (174)

Ferroelectric properties of PbTiO3

Physica, 1962
Abstract A new method for growing single crystals of ferroelectric PbTiO3 is described. A mixture of TiO2, Pb3O4 and KF in the ratio 1 : 2.5 : 6.5 is taken in a platinum crucible and heated to a temperature of about 900°C to 950°C for about 20 hours. The melt is then slowly cooled to room temperature.
V.G. Bhide, K.G. Deshmukh, M.S. Hegde
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Ferroelectric and Pyroelectric Properties of Nano Graded Ferroelectric Films

Advanced Materials Research, 2011
In order to improve the properties of nano graded ferroelectric films (NGFF), the generalized Ginzburg-Landau-Denvonshire (GLD) theory is used to investigate the ferroelectric and pyroelectric properties of NGFF. A function is introduced to describe the local structure of this graded film.
Hui Chen, Tai Min Cheng
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Ferroelectric and nonlinear optical properties of ferroelectric-superionic KTP

Ferroelectrics, 1993
Abstract Pyroelectric and nonlinear optical properties of KTP crystals are discussed. The SHG, optical and pyroelectric characteristics of multidomain crystals before and after poling are described and compared to single domain crystals.
V. D. Antsigin, V. A. Gusev, V. N. Semenenko, A. M. Yurkin   +3 more
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Ferroelectric and dielectric properties of ferrite-ferroelectric ceramic composites

Journal of Applied Physics, 2013
Particulate composites of ferrite and ferroelectric phases with xNiFe2O4 (NF) and (1 − x)Pb0.988(Zr0.52Ti0.48)0.976Nb0.024O3 (where x = 2, 10, 20, 30, 50, 70, and 100 wt. %) were prepared in situ by sol-gel method. The presence of a diphase composition was confirmed by X-ray diffraction while the microstructure of the composites was studied by scanning
Ciomaga, Cristina Elena, Neagu, Alexandra Maria, Pop, Mihai Valentin, Airimioaei, Mirela, Tascu, Sorin, Schileo, Giorgio, Galassi, Carmen, Mitoseriu, Liliana   +15 more
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Ferroelectric properties of pyridinium perrhenate

The Journal of Chemical Physics, 1997
Polycrystalline pyridinium perrhenate has been studied over a wide range of temperatures by differential thermal analysis, differential scanning calorimetry, proton NMR spectra and relaxation, and dielectric permittivity measurements. Two solid–solid phase transitions at 250 and 333 K have been revealed and the pyridinium cation reorientations ...
J. Wąsicki, P. Czarnecki, Z. Pająk, W. Nawrocik, W. Szczepański   +4 more
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Dielectric properties of microcomposite ferroelectrics

Phase Transitions, 1999
Abstract The dielectric response in two-phase composites of ferroelectric and dielectric materials was studied within the quasistatic approximation. Using different effective medium theories (Maxwell-Garnet theory, the effective medium approximation and the Bergman representation) the dielectric function was represented as a distribution of polar modes.
I. Rychetský, O. Hudák, J. Petzelt
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Ferroelectric properties of pyridinium fluorosulfonate

The Journal of Chemical Physics, 2000
Pyridinium fluorosulfonate has been synthesized and studied over a wide range of temperatures by differential thermal analysis, differential scanning calorimetry, H1H and F19 nuclear magnetic resonance (NMR) spectra and relaxation, and complex dielectric permittivity.
Z. Pająk, P. Czarnecki, H. Małuszyńska, B. Szafrańska, M. Szafran   +4 more
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Ferroelectric properties of pyridinium periodate

The Journal of Chemical Physics, 1998
Polycrystalline pyridinium periodate has been studied over a wide range of temperature by differential thermal analysis, proton nuclear magnetic resonance (NMR) spectra and relaxation and complex dielectric permittivity measurements. Two solid-solid phase transitions at 210 and 323 K have been revealed and the pyridinium cation reorientation in all ...
Z. Pająk, P. Czarnecki, J. Wąsicki, W. Nawrocik   +3 more
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Ferroelectric Properties of Colemanite

Journal of Applied Physics, 1959
The ferroelectric properties of the calcium borate mineral colemanite are investigated in the ferroelectric and paraelectric temperature regions. It is shown that Devonshire's phenomenological theory may be applied successfully to account for the experimental measurements of spontaneous polarization and electrical susceptibility over a wide temperature
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Dynamic properties of relaxor ferroelectrics

Journal of Applied Physics, 1999
We calculate the dynamic order parameter and dielectric susceptibility for the relaxor ferroelectrics like PbMg1/3Nb2/3O3, PbSc1/2Ta1/2O3 and Pb1−xLaxZryTi1−yO3. Calculations of temperature and frequency dependence of dielectric susceptibility show the existence of low- and high-temperature group of maxima obeyed to Vogel–Fulcher (VF) and Arrhenius ...
M. D. Glinchuk, V. A. Stephanovich
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