Patents by Inventor Wook Jo

Wook Jo 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).

  • Room-temperature multiferroicity material, method for preparing same, and electronic device comprising same
    Patent number: 12183492
    Abstract: The present invention relates to a room-temperature multiferroicity material, a method for preparing same, and an electronic device comprising same. According to an example embodiment of the present invention, a room-temperature multiferroicity material according to an aspect of the present disclosure comprises a compound in chemical Formula (2) below in a compound matrix in chemical formula (1) below. Chemical formula (1) (Pb1-xTMx)Fe1/2Nb1/2O3 (in chemical formula (1), TM comprises at least one selected from the group consisting of Fe, Ni and Co, and x is a number greater than 0 and smaller than 1). Chemical formula (2) ABO3 (in chemical formula (2), A comprises at least one selected from the group consisting of Pb, Bi and Ba, and B comprises Ti and/or Zr).
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: December 31, 2024
    Assignee: UNIST (ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY)
    Inventors: Wook Jo, Jae Hyeon Cho
  • Ferromagnetic element-substituted room-temperature multiferroic material and method for manufacturing same
    Patent number: 11958758
    Abstract: Disclosed is a ferromagnetic element-substituted room-temperature multiferroic material having ferromagnetism and ferroelectricity at room temperature, wherein the ferromagnetic element-substituted room-temperature multiferroic material includes a compound of chemical formula 1: <chemical formula 1> (Pb1-xMx)Fe1/2Nb1/2O3. In chemical formula 1, M represents a ferromagnetic element, and x represents a number greater than 0 and smaller than 1.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: April 16, 2024
    Assignee: UNIST(ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY)
    Inventors: Wook Jo, Jae Hyeon Cho
  • ROOM-TEMPERATURE MULTIFERROICITY MATERIAL, METHOD FOR PREPARING SAME, AND ELECTRONIC DEVICE COMPRISING SAME
    Publication number: 20220199298
    Abstract: The present invention relates to a room-temperature multiferroicity material, a method for preparing same, and an electronic device comprising same. According to an example embodiment of the present invention, a room-temperature multiferroicity material according to an aspect of the present disclosure comprises a compound in chemical Formula (2) below in a compound matrix in chemical formula (1) below. Chemical formula (1) (Pb1-xTMx)Fe1/2Nb1/2O3 (in chemical formula (1), TM comprises at least one selected from the group consisting of Fe, Ni and Co, and x is a number greater than 0 and smaller than 1). Chemical formula (2) ABO3 (in chemical formula (2), A comprises at least one selected from the group consisting of Pb, Bi and Ba, and B comprises Ti and/or Zr).
    Type: Application
    Filed: April 21, 2020
    Publication date: June 23, 2022
    Inventors: Wook Jo, Jae Hyeon Cho
  • FERROMAGNETIC ELEMENT-SUBSTITUTED ROOM-TEMPERATURE MULTIFERROIC MATERIAL AND METHOD FOR MANFUACTURING SAME
    Publication number: 20210340024
    Abstract: Disclosed is a ferromagnetic element-substituted room-temperature multiferroic material having ferromagnetism and ferroelectricity at room temperature, wherein the ferromagnetic element-substituted room-temperature multiferroic material includes a compound of chemical formula 1: <chemical formula 1> (Pb1-xMx)Fe1/2Nb1/2O3. In chemical formula 1, M represents a ferromagnetic element, and x represents a number greater than 0 and smaller than 1.
    Type: Application
    Filed: August 5, 2019
    Publication date: November 4, 2021
    Applicant: UNIST(ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY)
    Inventors: Wook JO, Jae Hyeon CHO
  • Ceramic material, method for the production of the ceramic material and component comprising the ceramic material
    Patent number: 8786167
    Abstract: The invention relates to a ceramic binary material and to a method for the production thereof. The material has piezoelectric properties and has a composition of the formula (1?x)(Bi0.5Na0.5TiO3)×(K0.5Na0.5NbO3), where 0<x?0.15. Furthermore, the invention relates to a component comprising said material.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: July 22, 2014
    Assignee: EPCOS AG
    Inventors: Alain Brice Kounga Njiwa, Shan-Tao Zhang, Juergen Roedel, Wook Jo, Torsten Granzow
  • Methods of fabricating polycrystalline ceramic for thermoelectric devices
    Publication number: 20120068389
    Abstract: Provided is a method of fabricating polycrystalline ceramic for thermoelectric devices. The method includes preparing calcined ceramic powders, forming a ceramic sheet by uni-axially pressing the calcined ceramic powders, stacking a plurality of the ceramic sheets in a uni-axial direction, and cofiring the stacked the plurality of the ceramic sheets.
    Type: Application
    Filed: March 11, 2011
    Publication date: March 22, 2012
    Inventors: Chan Park, Wook Jo, Jin-Sang Kim, O-Jong Kwon
  • Ceramic Material, Method for the Production of the Ceramic Material and Component Comprising the Ceramic Material
    Publication number: 20110291522
    Abstract: The invention relates to a ceramic binary material and to a method for the production thereof. The material has piezoelectric properties and has a composition of the formula (1?x)(Bi0.5Na0.5TiO3)x(K0.5Na0.5NbO3), where 0<x?0.15. Furthermore, the invention relates to a component comprising said material.
    Type: Application
    Filed: April 30, 2009
    Publication date: December 1, 2011
    Applicant: EPCOS AG
    Inventors: Alain Brice Kounga Njiwa, Shan-Tao Zhang, Juergen Roedel, Wook Jo, Torsten Granzow