Patents by Inventor Kyohei ATSUJI

Kyohei ATSUJI 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).

  • Publication number: 20220305470
    Abstract: A silicon carbide porous body contains ?-SiC particles, Si particles, and metal silicide particles. The maximum particle diameter of the ?-SIC particles is not smaller than 15 ?m. The content of the Si particles is not lower than 10 mass %. The maximum particle diameter of the Si particles is not larger than 40 ?m. Further, an oxide coating film having a thickness not smaller than 0.01 ?m and not larger than 5 ?m is provided on surfaces of the Si particles.
    Type: Application
    Filed: February 4, 2022
    Publication date: September 29, 2022
    Applicant: NGK INSULATORS, LTD.
    Inventors: Shinji SUZUKI, Kyohei ATSUJI, Takahiro TOMITA
  • Publication number: 20220306539
    Abstract: A composite sintered body contains a silicon phase which is a main phase, a cordierite phase, and an amorphous phase containing Si. Further, the volume resistivity thereof at a room temperature is not lower than 0.1?·cm and not higher than 2.5?·cm.
    Type: Application
    Filed: February 4, 2022
    Publication date: September 29, 2022
    Applicant: NGK INSULATORS, LTD.
    Inventors: Kyohei ATSUJI, Shinji SUZUKI, Shinpei OSHIMA, Takahiro TOMITA
  • Patent number: 11332410
    Abstract: A sintered compact includes an alumina phase as a primary phase, and further includes an amorphous phase containing Si and Mn and a cordierite phase. The sintered compact has a porosity of higher than or equal to 1.1% and less than or equal to 5.0%. Preferably, I1/(I1+I2) is greater than or equal to 0.20 and less than or equal to 0.45, where I1 is the strength of the main peak of cordierite obtained by an XRD method, and I2 is the strength of the main peak of alumina.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: May 17, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Kyohei Atsuji, Noboru Nishimura, Yuji Katsuda
  • Publication number: 20220084865
    Abstract: A composite sintered body includes a base material that contains Al2O3 as a main component, and an electrode arranged inside or on a surface of the base material. The electrode contains Ru, ZrO2, and Al2O3.
    Type: Application
    Filed: September 8, 2021
    Publication date: March 17, 2022
    Applicant: NGK INSULATORS, LTD.
    Inventors: Keita MIYANISHI, Kyohei ATSUJI, Asumi NAGAI, Hirofumi YAMAGUCHI, Soichiro AOYAGI
  • Publication number: 20220081365
    Abstract: A composite sintered body includes a base material that includes ceramic as a main component, and an electrode arranged inside the base material or on a surface of the base material. The electrode contains W and ZrO2.
    Type: Application
    Filed: August 20, 2021
    Publication date: March 17, 2022
    Applicant: NGK INSULATORS, LTD.
    Inventors: Kyohei ATSUJI, Keita MIYANISHI, Asumi NAGAI, Hirofumi YAMAGUCHI
  • Publication number: 20210134639
    Abstract: A composite sintered body includes a base material (i.e., a main body) using ceramics as a main material and an electrode disposed inside the main body or on a surface thereof. The electrode contains WC and TiN. It is thereby possible to reduce the difference in thermal expansion coefficient between the electrode and the main body while suppressing an increase in the resistivity of the electrode. As a result, it is possible to suppress any damage such as a crack, a breakage, or the like of the main body, which is caused by the difference in the thermal expansion coefficient.
    Type: Application
    Filed: October 14, 2020
    Publication date: May 6, 2021
    Applicant: NGK INSULATORS, LTD.
    Inventor: Kyohei ATSUJI
  • Publication number: 20200407279
    Abstract: The composite sintered body includes Al2O3, and MgAl2O4. The content of Al2O3 in the composite sintered body is not less than 95.5% by weight. The average sintered grain size of Al2O3 in the composite sintered body is not less than 2 ?m and not greater than 4 ?m. The standard deviation of sintered grain size distribution of Al2O3 in the composite sintered body is not greater than 0.35. The bulk density of the composite sintered body is not less than 3.94 g/cm3 and not greater than 3.98 g/cm3. In the composite sintered body, the ratio of amount of crystal phase of MgAl2O4 to that of Al2O3 is not less than 0.003 and not greater than 0.01.
    Type: Application
    Filed: September 16, 2020
    Publication date: December 31, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: Kyohei ATSUJI, Noboru NISHIMURA, Asumi NAGAI, Yuji KATSUDA
  • Patent number: 10863587
    Abstract: A ceramic structure 10 includes a heater electrode 14 within a disk-shaped AlN ceramic substrate 12. The heater electrode 14 contains a metal filler in the main component WC. The metal filler (such as Ru or RuAl) has a lower resistivity and a higher thermal expansion coefficient than AlN. An absolute value of a difference |?CTE| between a thermal expansion coefficient of the AlN ceramic substrate 12 and a thermal expansion coefficient of the heater electrode 14 at a temperature in the range of 40° C. to 1000° C. is 0.35 ppm/° C. or less.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: December 8, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Kyohei Atsuji, Noboru Nishimura, Yuji Katsuda
  • Publication number: 20200165168
    Abstract: A sintered compact includes an alumina phase as a primary phase, and further includes an amorphous phase containing Si and Mn and a cordierite phase. The sintered compact has a porosity of higher than or equal to 1.1% and less than or equal to 5.0%. Preferably, I1/(I1+I2) is greater than or equal to 0.20 and less than or equal to 0.45, where I1 is the strength of the main peak of cordierite obtained by an XRD method, and I2 is the strength of the main peak of alumina.
    Type: Application
    Filed: January 30, 2020
    Publication date: May 28, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: Kyohei ATSUJI, Noboru NISHIMURA, Yuji KATSUDA
  • Publication number: 20170251524
    Abstract: A ceramic structure 10 includes a heater electrode 14 within a disk-shaped AlN ceramic substrate 12. The heater electrode 14 contains a metal filler in the main component WC. The metal filler (such as Ru or RuAl) has a lower resistivity and a higher thermal expansion coefficient than AlN. An absolute value of a difference |?CTE| between a thermal expansion coefficient of the AlN ceramic substrate 12 and a thermal expansion coefficient of the heater electrode 14 at a temperature in the range of 40° C. to 1000° C. is 0.35 ppm/° C. or less.
    Type: Application
    Filed: February 6, 2017
    Publication date: August 31, 2017
    Applicant: NGK INSULATORS, LTD.
    Inventors: Kyohei ATSUJI, Noboru NISHIMURA, Yuji KATSUDA