Zobrazeno 1 - 10
of 316
pro vyhledávání: '"Jean Ravez"'
Autor:
Jean Ravez, Annie Simon
Publikováno v:
Journal of Advanced Dielectrics
Journal of Advanced Dielectrics, 2011, 1 (2), pp.251-255. ⟨10.1142/S2010135X11000240⟩
Journal of Advanced Dielectrics, 2011, 1 (2), pp.251-255. ⟨10.1142/S2010135X11000240⟩
Electronic version of an article published as Journal of Advanced Dielectrics, 2011, vol. 1, n° 2, p. 251-255. DOI: 10.1142/S2010135X11000240] © [copyright World Scientific Publishing Company : http://www.worldscinet.com/jad/]; International audien
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74960a6cf303bd9b7ba9abd919d474eb
https://doi.org/10.1142/s2010135x11000240
https://doi.org/10.1142/s2010135x11000240
Publikováno v:
Solid State Sciences. 8:613-618
In order to investigate the effect of A-site homovalent and heterovalent substitution on phase transition in barium titanium zirconium oxide (Ba(Ti0.7Zr0.3)O3), dielectric studies were performed on ceramics of Ba 1 − x A x (Ti0.7Zr0.3)O3 and Ba 1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e52acd26d76ef89996b4f623b5159a0d
https://doi.org/10.1016/j.solidstatesciences.2006.02.033
https://doi.org/10.1016/j.solidstatesciences.2006.02.033
Autor:
Jean Ravez, Annie Simon
Publikováno v:
Solid State Sciences
Solid State Sciences, Elsevier, 2003, 5 (11-12), pp.1459-1464. ⟨10.1016/S1293-2558(03)00194-8⟩
Solid State Sciences, Elsevier, 2003, 5 (11-12), pp.1459-1464. ⟨10.1016/S1293-2558(03)00194-8⟩
The present work concerns the preparation and dielectric characterization of some new non-stoichiometric lead-free ceramics with perovskite compositions derived from BaTiO 3 . Lead-free compositions could be of great interest for environment-friendly
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b5cf293f92fc9990c90fe762ba91f3e
https://doi.org/10.1016/s1293-2558(03)00194-8
https://doi.org/10.1016/s1293-2558(03)00194-8
Autor:
V. Hornebecq, Jan Petzelt, Catherine Elissalde, Ivan Gregora, Mario Maglione, Viktor Bovtun, V. Porokhonskyy, Jean Ravez
Publikováno v:
Journal of Physics and Chemistry of Solids
Journal of Physics and Chemistry of Solids, Elsevier, 2003, 64 (3), pp.471-476. ⟨10.1016/S0022-3697(02)00342-6⟩
Journal of Physics and Chemistry of Solids, Elsevier, 2003, 64 (3), pp.471-476. ⟨10.1016/S0022-3697(02)00342-6⟩
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 microwave measurements at 36 GHz and micro-Raman experiments were performed in order to ext
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73697f7b10bbe3af95d0e83ebb74caf2
https://doi.org/10.1016/s0022-3697(02)00342-6
https://doi.org/10.1016/s0022-3697(02)00342-6
Publikováno v:
Materials Letters
Materials Letters, Elsevier, 2002, 55 (3), pp.138-144. ⟨10.1016/S0167-577X(01)00636-X⟩
Materials Letters, Elsevier, 2002, 55 (3), pp.138-144. ⟨10.1016/S0167-577X(01)00636-X⟩
International audience; By partial cationic and anionic substitutions in NaNbO3-SrNb2O6 and KNbO3-SrNb2O6 systems, two solid solutions have been obtained: Sr2−xNa1+xNb5O15−xFx and Sr2−xK1+xNb5O15−xFx. They crystallize in the tetragonal tungst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5e0ce8856c6bc8ccd05bea9b2a9a932
https://doi.org/10.1016/s0167-577x(01)00636-x
https://doi.org/10.1016/s0167-577x(01)00636-x
Autor:
Jean Ravez
L’organisation de l’enseignement en trois reseaux determine les missions assignees aux inspecteurs. Dans les deux reseaux subventionnes, elles se limitent au controle. Elles sont plus larges dans le reseau officiel gere par le ministre et concern
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5e3b28d1a7633f3d43a9dc1699e0cc8
http://ries.revues.org/3557
http://ries.revues.org/3557
Autor:
Jean Ravez, A. Simon
Publikováno v:
Journal of Solid State Chemistry. 162:260-265
Some solid state chemistry aspects are investigated in relaxor ferroelectrics of both perovskite and tetragonal tungsten bronze (TTB) structure. Various issues regarding composition, cationic charge, electronic configuration, and structure are discus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::512791c81ccb6714fd39631edfe90016
https://doi.org/10.1006/jssc.2001.9285
https://doi.org/10.1006/jssc.2001.9285
Publikováno v:
Phase Transitions. 74:521-529
The ac conductivity of three fluorides of A2MII+ MIII + F9 type, Sr2NiAlF9, Sr2ZnGaF9 and Ba2MnCrF9, between 293 and 773K, has been analyzed within a combined complex impedance and modulus formalism. The antiferroelectric-paraelectric phase transitio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0cee62e7a99aac2a414eba710bef03a
https://doi.org/10.1080/01411590108227589
https://doi.org/10.1080/01411590108227589
Publikováno v:
physica status solidi (a). 187:549-556
Three solid solutions were prepared from Ba 2 NaNb 5 O 15 by coupled cationic and/or anionic substitutions: Ba 2-x Na 1+x (Nb 5-x W x )O 15 . Ba 2-x Na 1+x Nb 5 O 15-x F x and Ba 2 NaNb 5-x Ti x O 15-x F x . They crystal-lize with a TKWB-type structu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b775354de3a584a017cb586370751f8
https://doi.org/10.1002/1521-396x(200110)187:2<549::aid-pssa549>3.0.co
https://doi.org/10.1002/1521-396x(200110)187:2<549::aid-pssa549>3.0.co
Publikováno v:
Journal of Solid State Chemistry. 157:261-273
New compositions derived from Pb{sub 5}Ta{sub 10}O{sub 30} have been synthetized to study the influence of cationic substitutions [heterovalent (Pb{sup 2+}La{sup 3+} and Pb{sup 2+}K{sup +}) and homovalent (Pb{sup 2+}Ba{sup 2+} and Pb{sup 2+}Ca{sup 2+
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::349ef89418bad0e2e7a8c50d5abe3d5b
https://doi.org/10.1006/jssc.2000.9049
https://doi.org/10.1006/jssc.2000.9049