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    METHOD OF PREPARING SPHERICAL TITANIUM OXIDE POWDER
    1.
    发明专利
    METHOD OF PREPARING SPHERICAL TITANIUM OXIDE POWDER 失效

    公开(公告)号：JP2002274851A

    公开(公告)日：2002-09-25

    申请号：JP2001078969

    申请日：2001-03-19

    Applicant: NAT INST FOR MATERIALS SCIENCE

    Inventor： ISHIGAKI TAKAMASA ,  WATANABE KENJI ,  RI ARI ,  KATAOKA EIJI

    IPC: C01G23/04 ,  B01J21/06 ,  B01J35/02

    Abstract: PROBLEM TO BE SOLVED: To provide a method of preparing spherical monodisperse titanium dioxide particles which facilitates handling of the powder, has a grain size of 0.3 to 10 microns and has high crystallinity. SOLUTION: Non-oxide raw material is melted by an oxygen-containing plasma and simultaneously the oxidation reaction of the melt is induced. Since the oxidation reaction is an endothermic reaction, temperature rises locally near the melt and the liquid drops of the oxide of 0.3 to 10 micros splash. These liquid drops are solidified, by which the crystalline spherical titanium dioxide powder is obtained.

    TITANIUM DIOXIDE PARTICLE DOPED WITH RARE EARTH ELEMENT AND METHOD FOR PRODUCING SAME
    2.
    发明申请
    TITANIUM DIOXIDE PARTICLE DOPED WITH RARE EARTH ELEMENT AND METHOD FOR PRODUCING SAME 审中-公开
    具有稀土元素的二氧化钛颗粒及其生产方法

    公开(公告)号：WO2006135104B1

    公开(公告)日：2007-02-15

    申请号：PCT/JP2006312460

    申请日：2006-06-15

    Applicant: NAT INST FOR MATERIALS SCIENCE ,  LI JIGUANG ,  ISHIGAKI TAKAMASA

    Inventor： LI JIGUANG ,  ISHIGAKI TAKAMASA

    IPC: C01G23/053 ,  C09K11/08 ,  C09K11/67

    CPC classification number: C01G23/047 ,  C01G23/053 ,  C01P2002/52 ,  C01P2002/72 ,  C01P2002/82 ,  C01P2002/84 ,  C01P2004/04 ,  C09K11/7701 ,  C09K11/7729 ,  Y10T428/2982

    Abstract: Disclosed is a titanium dioxide particle which enables to take out fluorescence of a rare earth element highly efficiently. Specifically disclosed is a titanium dioxide particle wherein a titanium site is substituted with a rare earth element. Also specifically disclosed is a method for producing such a titanium dioxide particle. A method for producing a titanium dioxide particle doped with a rare earth element comprises a step for preparing a liquid precursor containing a titanium source and a rare earth metal source wherein the amount of rare earth element in the rare earth metal source is more than 0 at% and not more than 5.0 at%, a step for generating a thermal plasma, and a step for introducing the liquid precursor into the thermal plasma.

    Abstract translation: 公开了能够高效率地取出稀土元素的荧光的二氧化钛粒子。 具体公开了二氧化钛颗粒，其中钛部位被稀土元素取代。 还公开了制造这种二氧化钛颗粒的方法。 掺杂有稀土元素的二氧化钛颗粒的制造方法包括制备含有钛源和稀土金属源的液体前体的步骤，其中稀土金属源中的稀土元素的量大于0 ％且不大于5.0at％，用于产生热等离子体的步骤，以及用于将液体前体引入热等离子体的步骤。

    RARE-EARTH ELEMENT-DOPED TITANIUM DIOXIDE PARTICLE AND ITS MANUFACTURING METHOD
    3.
    发明专利
    RARE-EARTH ELEMENT-DOPED TITANIUM DIOXIDE PARTICLE AND ITS MANUFACTURING METHOD 审中-公开

    公开(公告)号：JP2006347826A

    公开(公告)日：2006-12-28

    申请号：JP2005177077

    申请日：2005-06-17

    Applicant: NAT INST FOR MATERIALS SCIENCE

    Inventor： RI TSUGUMITSU ,  ISHIGAKI TAKAMASA

    IPC: C01G23/053 ,  C09K11/08 ,  C09K11/67

    Abstract: PROBLEM TO BE SOLVED: To provide a titanium dioxide particle capable of generating the fluorescence based on a rare-earth element with a high efficiency, viz. a titanium dioxide particle in which a rare-earth element is substituted for a titanium site, and its manufacturing method. SOLUTION: The method for manufacturing the rare-earth element-doped titanium dioxide particle comprises a process for preparing a liquid precursor containing a titanium source and a rare-earth metal source in which an amount of the rare-earth element in the rare-earth metal source is in a range over 0 at% to 5.0 at%, a process for generating a thermal plasma, and a process for feeding the liquid precursor into the thermal plasma. COPYRIGHT: (C)2007,JPO&INPIT

    6.
    发明专利
    未知

    公开(公告)号：DE112006001598T5

    公开(公告)日：2008-04-30

    申请号：DE112006001598

    申请日：2006-06-15

    Applicant: NAT INST FOR MATERIALS SCIENCE

    Inventor： LI JIGUANG ,  ISHIGAKI TAKAMASA

    IPC: C09K11/08 ,  C01G23/053 ,  C09K11/67

    Abstract: Titanium dioxide particles is doped with a rare earth element. The doping ratio of the rare earth element is within a range more than 0 at % and not more than 5.0 at %, and the rare earth element is substituted for titanium atoms in the unit lattice of titanium dioxide so that the titanium dioxide particles emit light attributable to the rare earth element when the titanium dioxide particles are irradiated with light having the absorption wavelength of titanium dioxide and showing a peak at 360 nm.

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