Abstract: The invention concerns a method for preparing a material based on piezoelectric ceramic oxide(s) comprising the following steps: a) wet deposition on at least one surface of a substrate of a layer of a dispersion comprising a piezoelectric ceramic oxide powder and a piezoelectric ceramic oxide precursor sol-gel solution identical to or different from the piezoelectric oxide constituting the powder; b) repeating a) once or several times, so as to obtain a stack of at least two layers; c) heat-treating said layers so as to transform them into corresponding ceramics; d) wet-shrink impregnation of the stack obtained at c) with a sol-gel solution identical to the one used in step a); e) optionally repeating step d) once or several times; f) heat-treating said stack, so as to transform the sol-gel impregnating the stack into the corresponding piezoelectric ceramics.
Type:
Application
Filed:
June 16, 2005
Publication date:
July 31, 2008
Applicant:
COMMESSARIAT A L'ENERGIE ATOMIQUE
Inventors:
Philippe Boy, Gilles Ehrhart, Phillippe Belleville
Abstract: The invention relates to a lithium battery, comprising at least one lithium intercalation compound, made up of crystallites and obtained by a production method, comprising at least the following steps: formation of a homogeneous mixture of at least one precursor for the lithium intercalation compound with a given adjunct, chemically stable with relation to crystallites and designed to limit the growth of crystallites or crystallite precursors during the formation thereof, thermal treatment of the homogeneous mixture for the synthesis of the lithium intercalation compound in the form of crystallites and to give a composite material comprising at least two phases formed respectively by the lithium intercalation compound and the adjunct and forming of the composite material to give said electrode. The invention further relates to an electrode obtained by said method and lithium battery comprising such an electrode.
Type:
Application
Filed:
July 21, 2005
Publication date:
October 25, 2007
Applicant:
COMMESSARIAT A L'ENERGIE ATOMIQUE
Inventors:
Frederic Le Cras, Sebastien Martinet, Carole Bourbon, Sebastien Launois
Abstract: An electronic emission device including plural electron beams including a first structure having a plurality of emission sources of electron beam, hybridized with a second structure including a plurality of diaphragm openings.
Type:
Application
Filed:
December 29, 2004
Publication date:
April 12, 2007
Applicant:
COMMESSARIAT A L'ENERGIE ATOMIQUE
Inventors:
Yohan Desieres, Pierre Nicolas, Charlotte Gillot, Serge Gidon, Jean-Luc Martin