Patents Assigned to Spark Plug Co., Ltd.
  • Preparing method of oxide superconductor, raw material for oxide superconductor, and preparing method of raw material for oxide superconductor
    Publication number: 20030198748
    Abstract: An aqueous solution of mixed metal acetate including one kind or more of element selected from lanthanide series and yttrium, barium and copper is mixed with trifluoroacetic acid to prepare a solution of mixed metal trifluoroacetate. From a solution of mixed metal trifluoroacetate obtained thus, purified mixed metal trifluoroacetate of which total content of water and acetic acid is 2% by weight or less is prepared. With purified mixed metal trifluoroacetate, an oxide superconductor of excellent performance may be prepared.
    Type: Application
    Filed: May 20, 2003
    Publication date: October 23, 2003
    Applicants: Kabushiki Kaisha Toshiba, International Superconductivity Technology Center, Spark Plug Co., Ltd.
    Inventors: Takeshi Araki, Katsuya Yamagiwa, Izumi Hirabayashi
  • Method of preparing oxide superconductor with purified mixed metal trifluoroacetate
    Patent number: 6586042
    Abstract: An aqueous solution of mixed metal acetate including one kind or more of element selected from lanthanide series and yttrium, barium and copper is mixed with trifluoroacetic acid to prepare a solution of mixed metal trifluoroacetate. From a solution of mixed metal trifluoroacetate obtained thus, purified mixed metal trifluoroacetate of which total content of water and acetic acid is 2% by weight or less is prepared. With purified mixed metal trifluoroacetate, an oxide superconductor of excellent performance may be prepared.
    Type: Grant
    Filed: September 5, 2001
    Date of Patent: July 1, 2003
    Assignees: Kabushiki Kaisha Toshiba, International Superconductivity Technology Center, Spark Plug Co., Ltd.
    Inventors: Takeshi Araki, Katsuya Yamagiwa, Izumi Hirabayashi