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L'etat Francais Represente Par Le Ministre Des Postes, Des

L'etat Francais, Represente Par Le Ministre Des Ptt (cnet)

L'etat Francais, Represente Par Le Ministere Des Postes, Des

Denise Morin

Jean Flicstein

Richard Moncorge

Francois Auzel

Jackie Etrillard

Method for obtaining an organic polycrystalline material having in particular electro-optical properties, said material obtained and an electro-optical modulator comprising said material. This method includes a stage (1) for preparing a powder having a size grading of 500 to 800 nm of an organic compound having a delocalized system of .pi. electrons and presenting a non-centrosymmetrical crystalline structure, as well as intramolecular load transfer groupings, a stage (2) for drying the powder under vacuum, a stage (3) for pre-pressing the powder under vacuum, and a hot stage (5) for the uniaxial compression of the dried powder under vacuum. This method enables polycrystalline materials to be obtained, said materials comprising elongated monocrystalline grains orientated according to a given direction.

Method for obtaining an organic polycrystalline material

A superconducting screen printing ink comprises an organic composition, a mineral binder and a mineral composition which is a high temperature superconducting Bi-Sr-Ca-Cu-O material or a precursor therefore. A thick superconducting film is produced by screen printing deposition of the ink on a substrate through a mask, drying and then baking the deposited ink. The ink and film are useful in microelectronics.

Superconducting screen printing ink and process for producing a thick

Method for obtaining an organic polycrystalline material having in particular electro-optical properties, said material obtained and an electro-optical modulator comprising said material. This method includes a stage (1) for preparing a powder having a size grading of 500 to 800 nm of an organic compound having a delocalized system of electrons .pi. and presenting a non-centrosymmetrical crystalline structure, as well as intramolecular load transfer groupings, a stage (2) for drying the powder under vacuum, a stage (3) for pre-pressing the powder under vacuum, and a hot stage (5) for the uniaxial compression of the dried powder under vacuum. This method enables polycrystalline materials to be obtained, said materials comprising elongated monocrystalline grains orientated according to a given direction.

Method for obtaining a solid polycrystalline material

The invention relates to a novel oxide for tunable lasers. These oxides comply with the formula:

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Nogent-Sur-Marne, France

Denise Morin