公开(公告)号：US20230093119A1

公开(公告)日：2023-03-23

申请号：US17801903

申请日：2021-02-26

Applicant: JFE MINERAL COMPANY, LTD.

Inventor： Hidefumi Konnai

IPC: B01J21/06 ,  B01J21/16 ,  B01J35/02 ,  B01J35/00

Abstract: Provided is halloysite powder including a granule in which halloysite including halloysite nanotubes and titanium oxide are aggregated. The granule includes a first pore derived from a tube hole of the halloysite nanotubes, and a second pore different from the first pore.

公开(公告)号：US20220371903A1

公开(公告)日：2022-11-24

申请号：US17771111

申请日：2020-10-26

Applicant: JFE MINERAL COMPANY, LTD.

Inventor： Hidefumi Konnai

IPC: C01B33/40 ,  C04B35/628 ,  C01B33/26 ,  C04B20/04

Abstract: Provided is halloysite powder having a small b value. The halloysite powder is powder including a granule in which halloysite including halloysite nanotubes is aggregated, the granule has a first pore deriving from a tube hole of the halloysite nanotubes and a second pore different from the first pore, and the Fe2O3 content is not more than 2.00 mass %.

公开(公告)号：US11370712B2

公开(公告)日：2022-06-28

申请号：US16467624

申请日：2017-12-07

Applicant: KOA CORPORATION ,  JFE MINERAL COMPANY, LTD.

Inventor： Yoji Gomi ,  Kenichi Iguchi ,  Etsurou Udagawa ,  Yuko Echizenya ,  Yoshimi Nakata

IPC: H01B1/08 ,  C04B35/453 ,  C01G9/02 ,  H01C7/12

Abstract: Focus is on zinc oxide itself, which is a base material for a zinc oxide varistor (laminated varistor), wherein specified quantities of additives are added to a zinc oxide powder having a crystallite size of 20 to 50 nm, grain diameter of 15 to 60 nm found using the specific surface area BET method, untamped density of 0.38 to 0.50 g/cm3, and tap density of 0.50 to 1.00 g/cm3. This allows securing of uniformity, high compactness, and high electrical conductivity of a zinc oxide sintered body, and provision of a zinc oxide varistor having high surge resistance.

公开(公告)号：US11180375B2

公开(公告)日：2021-11-23

申请号：US16344650

申请日：2017-10-24

Applicant: JFE MINERAL COMPANY, LTD.

Inventor： Hidefumi Konnai ,  Takayuki Fujita

IPC: B32B5/16 ,  C01B33/00 ,  C01B33/40 ,  C01B33/26

Abstract: Provided are a halloysite powder and a method for producing the halloysite powder. The halloysite powder contains granules in which halloysite including halloysite nanotubes is aggregated. The granules have first pores derived from the tube holes in the halloysite nanotubes and second pores that are different from the first pores.

公开(公告)号：US20210238053A1

公开(公告)日：2021-08-05

申请号：US16972266

申请日：2019-06-05

Applicant: JFE MINERAL COMPANY, LTD.

Inventor： Yoshimi NAKATA ,  Etsurou UDAGAWA ,  Yuko ECHIZENYA

IPC: C01G9/02

Abstract: A zinc oxide powder for producing a zinc oxide sintered body is provided with which it is possible to obtain a zinc oxide sintered body that has a small sintered particle size and high strength. This zinc oxide powder for producing a zinc oxide sintered body is used for producing a zinc oxide sintered body, wherein the Al content represented in formula (I) is greater than or equal to 20 mol ppm and less than or equal to 2 mol %. (I){nAl/(nZn+nAl)}×100. In formula (I), nAl represents the Al content in the zinc oxide powder, nZn represents the Zn content in the zinc oxide powder, and the unit of nZn and nAl is moles in both cases.

公开(公告)号：US20200083523A1

公开(公告)日：2020-03-12

申请号：US16683611

申请日：2019-11-14

Applicant: JFE Mineral Company, Ltd.

Inventor： Yoshiaki Hamano ,  Yosuke Iwasaki

IPC: H01M4/131 ,  H01M4/525 ,  C01G53/00 ,  H01M4/505 ,  H01M4/485 ,  H01M10/052

Abstract: A method of manufacturing a positive electrode material for a battery, wherein the material is a complex oxide whose overall composition is LiaNibMcNdLeOx, M: is selected from the group consisting of Mn and Co, N: is one, two, or more chemical elements selected from the group consisting of Mg, Al, Ti, Cr, and Fe, L: is one, two, or more chemical elements selected from the group consisting of B, C, Na, Si, P, S, K, Ca, and Ba, and where a/(b+c+d): 0.80 to 1.30, b/(b+c+d): 0.30 to 0.95, c/(b+c+d): 0.05 to 0.60, d/(b+c+d): 0.005 to 0.10, e/(b+c+d): 0.0005 to 0.010, b+c+d=1, and x: 1.5 to 2.5, the method including mixing raw material chemical elements or compounds containing raw material chemical elements, baking the resultant raw materials at a temperature of 700° C. or higher and 950° C. or lower in a baking process, and thereafter performing a treatment using a water-washing process.

公开(公告)号：US11299818B2

公开(公告)日：2022-04-12

申请号：US16312109

申请日：2017-06-28

Applicant: JFE MINERAL COMPANY, LTD.

Inventor： Kazuhiko Echizenya

IPC: C30B11/04 ,  C30B11/02 ,  C30B29/32 ,  C30B11/00

Abstract: Provided is a method for producing a single crystal, wherein compositional variations and defects in the single crystal can be prevented and a single crystal having uniform characteristics in the growth direction can be produced at high yield. In this method for producing a single crystal, a PbTiO3-containing single crystal is produced by the vertical Bridgman technique, wherein the thickness of a melt layer containing the melt in a crucible is at least 30 mm.

公开(公告)号：US20210354995A1

公开(公告)日：2021-11-18

申请号：US16467799

申请日：2017-12-07

Applicant: JFE MINERAL COMPANY, LTD.

Inventor： Etsurou UDAGAWA ,  Yuko ECHIZENYA ,  Yoshimi NAKATA

IPC: C01G9/02

Abstract: The zinc oxide powder has a crystallite size of 20 to 50 nm as determined by X-ray diffraction, a particle diameter of 15 to 60 nm as determined by the BET method, a loose bulk density of 0.38 to 0.50 g/cm3, and a tapped density of 0.50 to 1.00 g/cm3. The zinc oxide powder has a small number of bound particles and a high tap density, and is useful as a raw material for obtaining a zinc oxide sintered body exhibiting high strength and low thermal conduction.

公开(公告)号：US20210261421A1

公开(公告)日：2021-08-26

申请号：US17049443

申请日：2019-04-24

Applicant: JFE MINERAL COMPANY, LTD.

Inventor： Hidefumi Konnai

IPC: C01B33/40

Abstract: Provided are a novel metahalloysite powder and a production method thereof, which are not present in the prior art. The metahalloysite powder is a powder which comprises granules of aggregated metahalloysite comprising metahalloysite nanotubes, which are tube-shaped metahalloysite. The production method comprises a step of preparing a halloysite slurry which comprises halloysite nanotubes, a step for formulating a powder from the slurry, and a step for firing the formulated powder at a firing temperature of 500° C. or above.

公开(公告)号：US20210238054A1

公开(公告)日：2021-08-05

申请号：US16972268

申请日：2019-06-05

Applicant: JFE MINERAL COMPANY, LTD.

Inventor： Yoshimi NAKATA ,  Etsurou UDAGAWA ,  Yuko ECHIZENYA

IPC: C01G9/02

Abstract: A zinc oxide powder for producing a zinc oxide sintered body is provided with which it is possible to obtain a zinc oxide sintered body that has a large sintered particle size and excellent conductivity. This zinc oxide powder for producing a zinc oxide sintered body is used for producing a zinc oxide sintered body, wherein the Ga content represented in formula (I) is greater than or equal to 30 mol ppm and less than 3 mol %. (I) {nGa/(nZn+nGa)}×100 In formula (I), nGa represents the Ga content in the zinc oxide powder, nZn represents the Zn content in the zinc oxide powder, and the unit of nZn and nGa is moles in both cases.