Patents by Inventor Romuald Dez

Romuald Dez has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Sinterable nanopowder ceramic material and method for synthesis thereof
    Patent number: 7687421
    Abstract: The invention provides a method of synthesizing a Si/C/N/Ea/Fb/Gc/O multielement nanopowder that is directly suitable for sintering, E, F, and G representing three distinct metallic elements other than Si, and at least one of a, b, and c being non-zero. The nanopowder is obtained by laser pyrolysis of an aerosol comprising at least one metal precursor, hexamethyldisilazane Si2C6NH19 used as the sole solvent for said at least one metal precursor, and silane SiH4. Each grain of the resulting nanopowder contains all of the elements Si, C, N, Ea, Fb, Gc, and O, and the chemical composition of the nanopowder in terms of equivalent stoichiometric compounds is such that its free carbon content is less than 2% by weight and its SiO2 content is less than 10% by weight. The use of this nanopowder for fabricating a Si3N4/SiC composite ceramic.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: March 30, 2010
    Assignee: Commissariat A l'Energie Atomique
    Inventors: Romuald Dez, Nathalie Herlin-Boime
  • Sinterable Nanopowder Ceramic Material and Method for Synthesis Thereof
    Publication number: 20070232479
    Abstract: The invention provides a method of synthesizing a Si/C/N/Ea/Fb/Gc/O multielement nanopowder that is directly suitable for sintering, E, F, and G representing three distinct metallic elements other than Si, and at least one of a, b, and c being non-zero. The nanopowder is obtained by laser pyrolysis of an aerosol comprising at least one metal precursor, hexamethyldisilazane Si2C6NH19 used as the sole solvent for said at least one metal precursor, and silane SiH4. Each grain of the resulting nanopowder contains all of the elements Si, C, N, Ea, Fb, Gc, and O, and the chemical composition of the nanopowder in terms of equivalent stoichiometric compounds is such that its free carbon content is less than 2% by weight and its SiO2 content is less than 10% by weight. The use of this nanopowder for fabricating a Si3N4/SiC composite ceramic.
    Type: Application
    Filed: January 27, 2005
    Publication date: October 4, 2007
    Inventors: Romuald Dez, Nathalie Herlin-Boime