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    ZIRCONIUM OXIDE, PREPARATION AND USE
    1.
    发明专利
    ZIRCONIUM OXIDE, PREPARATION AND USE 未知

    公开(公告)号：AU636075B2

    公开(公告)日：1993-04-08

    申请号：AU1132992

    申请日：1992-02-28

    Applicant: DEGUSSA AKTIENGESELLSCHAFT

    Inventor： DIETER BINDER ,  PETER KLEINSCHMIT ,  HANS HOFFMEISTER ,  ROLAND REUTER

    IPC: C01G25/02 ,  C04B35/486

    Abstract: The invention relates to monoclinic zirconium oxide having an SiO2 content of less than 1% by weight, which is characterised by dendrite-shaped particles having a mean grain size (d50 value) in the range from 0.5 mu m to 3.0 mu m and a specific surface area (BET) in the range from 3 to 15 m /g. The zirconium oxide is prepared by thermal cracking of zirconium silicate in a high-frequency or medium-frequency inductive fusion furnace with a sinter crust crucible, quenching of the melt by blowing air onto a melt jet and/or spraying the latter with water and leaching the thermally cracked zirconium silicate with concentrated alkali metal hydroxide solution at 100 to 200 DEG C. The zirconium oxides according to the invention is distinguished from prior zirconium oxide by its improved suitability for the production of zirconium silicate colouring materials of the host lattice and inclusion types - pigments of higher colour intensity are obtained.

    MONOCLINIC ZIRCONIUM OXIDE,A PROCESS FOR ITS PREPARATION AND ITS USE
    4.
    发明专利
    MONOCLINIC ZIRCONIUM OXIDE,A PROCESS FOR ITS PREPARATION AND ITS USE 未知

    公开(公告)号：ZA921534B

    公开(公告)日：1992-11-25

    申请号：ZA921534

    申请日：1992-02-28

    Applicant: DEGUSSA

    Inventor： BINDER DIETER ,  DIETER BINDER ,  KLEINSCHMIT PETER ,  PETER KLEINSCHMIT ,  HOFFMEISTER HANS ,  HANS HOFFMEISTER ,  REUTER ROLAND ,  ROLAND REUTER

    IPC: C01G25/02 ,  C04B35/486 ,  C01G ,  C09C ,  C04B

    Abstract: The invention relates to monoclinic zirconium oxide having an SiO2 content of less than 1% by weight, which is characterised by dendrite-shaped particles having a mean grain size (d50 value) in the range from 0.5 mu m to 3.0 mu m and a specific surface area (BET) in the range from 3 to 15 m /g. The zirconium oxide is prepared by thermal cracking of zirconium silicate in a high-frequency or medium-frequency inductive fusion furnace with a sinter crust crucible, quenching of the melt by blowing air onto a melt jet and/or spraying the latter with water and leaching the thermally cracked zirconium silicate with concentrated alkali metal hydroxide solution at 100 to 200 DEG C. The zirconium oxides according to the invention is distinguished from prior zirconium oxide by its improved suitability for the production of zirconium silicate colouring materials of the host lattice and inclusion types - pigments of higher colour intensity are obtained.

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