Search Results - "Ravez, J."

Some Solid State Chemistry Aspects of Lead-Free Relaxor Ferroelectrics by Ravez, J., Simon, A.

“…Some solid state chemistry aspects are investigated in relaxor ferroelectrics of both perovskite and tetragonal tungsten bronze (TTB) structure. Various issues…”
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A Raman and dielectric study of ferroelectric Ba(Ti1-xZrx)O3 ceramics by FARHI, R, EL MARSSI, M, SIMON, A, RAVEZ, J

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X-ray diffraction study of BaTi0.65Zr0.35O3 and Ba0.92Ca0.08Ti0.75Zr0.25O3 compositions: influence of electric field by Sciau, Ph, Calvarin, G., Ravez, J.

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Relaxor-like and spectroscopic properties of niobium modified barium titanate by FARHI, R, EL MARSSI, M, SIMON, A, RAVEZ, J

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Dielectric and pyroelectric studies on the Ba1-3aBi2aTiO3 classical and relaxor ferroelectric ceramics by BAHRI, F, KHEMAKHEM, H, SIMON, A, VON DER MÜHLL, R, RAVEZ, J

“…Low frequency dielectric studies in the temperature range 80–500 K were performed on the solid solution derived from BaTiO3, Ba1−3aBi2aTiO3…”
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Paraelectric-Ferroelectric Transition in the Lamellar Thiophosphate CuInP2S6 by Simon, A, Ravez, J, Maisonneuve, V, Payen, C, Cajipe, V. B

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Dielectric relaxation in tetragonal tungsten bronze ceramics by Hornebecq, V, Elissalde, C, Porokhonskyy, V, Bovtun, V, Petzelt, J, Gregora, I, Maglione, M, Ravez, J

“…Ferroelectric tantalates with the tetragonal tungsten bronze (TTB) type structure were studied over a wide frequency range from 10 2 to 10 9 Hz. Complementary…”
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Lead-free relaxors with "TTB" structure containing either lanthanum or bismuth by Simon, A., Ravez, J.

“…TTB‐type lead‐free relaxor compositions containing either lanthanum or bismuth were studied. Their temperature and frequency dielectric properties were…”
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Classical or Relaxor Ferroelectric Behaviour of Ceramics with Composition Ba1-xBi2x/3TiO3 by Bahri, F., Simon, A., Khemakhem, H., Ravez, J.

“…Crystallographic and low frequency dielectric studies were performed on lead‐free non‐stoichiometric perovskite ceramics of Ba1—xBi2x/3□2x/3TiO3 (0 ≤ x ≤ 0.15)…”
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Study of disorder in a tetragonal tungsten bronze ferroelectric relaxor: a structural approach by Hornebecq, V., Elissalde, C., Weill, F., Villesuzanne, A., Menetrier, M., Ravez, J.

“…Electron diffraction analysis, nuclear magnetic resonance measurements, structure determinations and refinements were performed on two ferroelectric…”
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New Li + ferroelectric conductors with tetragonal tungsten bronze structure by Hornebecq, V., Réau, J.M., Ravez, J.

“…The evolution of conductivity in tetragonal tungsten bronze (TTB) oxides belonging to the Pb 5(1− x) Li 10 x Ta 10O 30 solid solution was studied using two…”
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Relaxor ferroelectricity in ceramics with composition Ba1−xKx(Ti1−xNbx)O3 by Ravez, J, Simon, A

“…Ceramics sintered at temperatures in the range 1200–1400°C and with composition Ba1−xKx(Ti1−xNbx)O3 (0.04≤x≤0.20) show a relaxor ferroelectric behaviour. All…”
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Non-Stoichiometric Perovskites Derived from BaTiO3 with a Ferroelectric Relaxor Behaviour by Ravez, J., Simon, A.

“…Crystallographic and low frequency dielectric studies were performed on lead‐free non‐stoichiometric perovskite ceramics of Ba1—xAx/2(Ti1—xNbx)O3 (A = Ca, Sr,…”
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Classical or relaxor ferroelectric ceramics in the BaTiO3-KNbO3-CaTiO3 system by RAVEZ, J, SIMON, A

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Impedance-Spectroscopy Analysis of a LiTaO3-Type Single Crystal by Ming, Dong, Reau, J.M., Ravez, J., Gitae, Joo, Hagenmuller, P.

“…Low-frequency dielectric dispersion phenomena in a LiTaO3-type single crystal have been analyzed by impedance spectroscopy in directions parallel and…”
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Study of new relaxor materials in BaTiO3BaZrO3La2/3TiO3 system by Aliouane, K., Guehria-Laidoudi, A., Simon, A., Ravez, J.

“…Dielectric studies were performed on new lead-free ceramics derived from BaTiO3 by iso-valent and off-valent substitutions in both octahedral and dodecahedral…”
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New considerations on the role of covalency in ferroelectric niobates and tantalates by VILLESUZANNE, A, ELISSALDE, C, POUCHARD, M, RAVEZ, J

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Structure-property correlation over five phases and four transitions in Pb5Al3F19 by Abrahams, S. C., Ravez, J., Ritter, H., Ihringer, J.

“…The calorimetric and dielectric properties of Pb5Al3F19 in the five phases stable under ambient pressure are correlated with structure for fuller…”
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Dielectric study of KNbO3 ceramics over a large range of frequency (102-109Hz) and temperature (300-800 K) by Dubernet, P., Ravez, J.

“…KNbO 3 ceramics were sintered at 1263K thanks to a LiF additive. The ferroelectric-paraelectric transition is of first order and occurs at T c ∼670K. A…”
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Relations between ionic order or disorder and classical or relaxor ferroelectric behaviour in two lead-free TKWB-type ceramics by Ravez, J., El Alaoui-Belghiti, H., Elaatmani, M., Simon, A.

“…Two ceramics of Ba 2NaNb 5O 15 and BaNa 2Nb 5O 14F compositions, which have a tetragonal tungsten bronze (TKWB)-type structure, are synthesized and…”
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