Patents by Inventor Yasunori Fudamoto

Yasunori Fudamoto 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).

  • MgB2—based superconductor with high critical current density, and method for manufacturing the same
    Patent number: 6953770
    Abstract: The present invention relates to an MgB2-based superconductor that is easy to manufacture and well suited to mass production, and that exhibits excellent superconducting characteristics (such as a high critical current density) while still retaining the high critical temperature characteristics of MgB2. A powder mixture of magnesium, boron, and titanium is pressed into a pellet, and this product is sintered under an atmospheric pressure and other conditions (preferably at 600° C. or higher) to manufacture an MgB2-based superconductor in which titanium and/or a titanium compound are dispersed in polycrystalline MgB2. The composition of the MgB2-based superconductor is preferably adjusted to have an atomic ratio of Mg:B:Ti=x:2:y, 0.7<x<1.2 and 0.05<y<0.3, and more preferably 0.07<y<0.2, by adjusting the amounts in which the raw materials are added.
    Type: Grant
    Filed: May 10, 2002
    Date of Patent: October 11, 2005
    Assignee: International Superconductivity Technology Center, The Juridical Foundation
    Inventors: Yong Zhao, Yong Feng, Yuan Wu, Takato Machi, Yasunori Fudamoto, Naoki Koshizuka, Masato Murakami
  • Mgb2-based superconductor having high critical current density and method for preparation thereof
    Publication number: 20040092403
    Abstract: The present invention relates to an MgB2-based superconductor that is easy to manufacture and well suited to mass production, and that exhibits excellent superconducting characteristics (such as a high critical current density) while still retaining the high critical temperature characteristics of MgB2. A powder mixture of magnesium, boron, and titanium is pressed into a pellet, and this product is sintered under an atmospheric pressure and other conditions (preferably at 600° C. or higher) to manufacture an MgB2-based superconductor in which titanium and/or a titanium compound are dispersed in polycrystalline MgB2. The composition of the MgB2-based superconductor is preferably adjusted to have an atomic ratio of Mg:B:Ti=x:2:y, 0.7<x<1.2 and 0.05<y<0.3, and more preferably 0.07<y<0.2, by adjusting the amounts in which the raw materials are added.
    Type: Application
    Filed: January 22, 2003
    Publication date: May 13, 2004
    Inventors: Yong Zhao, Yong Feng, Yuan Wu, Takato Machi, Yasunori Fudamoto, Naoki Koshizuka, Masato Murakami