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    1.
    发明专利
    未知

    公开(公告)号：BR8802711A

    公开(公告)日：1988-12-27

    申请号：BR8802711

    申请日：1988-06-03

    Applicant: DEGUSSA

    Inventor： KISS AKOS ,  KLEINSCHMITT PETER ,  HANICH JURGEN ,  HALBRITTER GUENTER ,  HORST JENNY

    IPC: C09C3/06 ,  C09C1/00 ,  C09C1/40 ,  C09C1/42

    Abstract: Encapsulation pigments comprising chromophoric particles embedded in glaze-stable casings are prepared by means of calcination from the appropriate initial products. High yields and strong color intensities are obtained if the chromophoric substance or its initial compounds are bound in and/or to a zeolite and are calcined in this form with the remaining constituents.

    3.
    发明专利
    未知

    公开(公告)号：MX163305A

    公开(公告)日：1992-04-14

    申请号：MX1174788

    申请日：1988-06-02

    Applicant: DEGUSSA

    Inventor： KISS AKOS ,  KLEINSCHMIT PETER ,  HANICH JUERGEN ,  HALBRITTER GUENTER ,  HORST JENNY

    IPC: C09C3/06 ,  C09C1/00 ,  C09C1/40 ,  C09C1/42 ,  C03C1/04

    Abstract: Encapsulation pigments comprising chromophoric particles embedded in glaze-stable casings are prepared by means of calcination from the appropriate initial products. High yields and strong color intensities are obtained if the chromophoric substance or its initial compounds are bound in and/or to a zeolite and are calcined in this form with the remaining constituents.

    Doped alkaline earth metal and lead ferrite prodn.
    4.
    发明专利
    Doped alkaline earth metal and lead ferrite prodn. 未知

    公开(公告)号：DE3922747A1

    公开(公告)日：1990-03-08

    申请号：DE3922747

    申请日：1989-07-11

    Applicant: DEGUSSA

    Inventor： SPEER DIETRICH DR ,  HALBRITTER GUENTER ,  KLEINSCHMIT PETER DR

    IPC: G11B5/706

    Abstract: Prodn. of finely divided flakes of doped alkaline earth metal and lead ferrites, for data carriers, from raw ferrite materials or impure ceramic raw materials involves (a) dissolving the starting substances by digestion with molten basic alkali metal cpds. in excess; (b) dissolving the melt in water to obtain a precursor; and (c) heat treating the filtered-off precursor for 0.5-6 hrs. at 600-950 deg.C.

    7.
    发明专利
    未知

    公开(公告)号：BR8501701A

    公开(公告)日：1985-12-10

    申请号：BR8501701

    申请日：1985-04-11

    Applicant: DEGUSSA

    Inventor： KISS AKOS DR ,  KLEINSCHMIT PETER DR ,  VOLKER WERNER DR ,  HALBRITTER GUENTER

    IPC: C09K11/08 ,  C09K11/67 ,  C09K11/66

    Abstract: There are described luminescent materials activated with lead upon excitation with long wave and short wave ultraviolet rays emit in the blue-green region, have long afterglow times, can be prepared from components which do not have high purity, are not susceptible to pulverizing, and are stable to the customary ceramic glazes. They consist of (or consist essentially of): 10 to 89.9 mole % zirconium oxide (ZrO2) 5 to 85 mole % boron oxide (B2O3) 5 to 85 mole % silicon dioxide (SiO2) 0.1 to 20 mole % lead oxide (PbO) 0 to 15 mole % sodium oxide (Na2O) 0 to 15 mole % potassium oxide (K2O) and 0 to 5 mole % aluminum oxide (Al2O3).

    8.
    发明专利
    未知

    公开(公告)号：DE4216175C2

    公开(公告)日：1994-06-30

    申请号：DE4216175

    申请日：1992-05-15

    Applicant: DEGUSSA

    Inventor： SPEER DIETRICH DR ,  KISS AKOS DR ,  HORST JENNY ,  HALBRITTER GUENTER ,  LOEW RITA

    IPC: C03C8/14 ,  C04B41/86 ,  C09C3/06 ,  C04B41/00

    Abstract: The invention relates to a process for the preparation of decorations which are colour-stable in porcelain firing (glost firing), and to a pigment composition suitable for this purpose. Most pigments are not sufficiently colour-stable in porcelain firing. There is a need for increasing the colour stability of pigments. Inclusion pigments based on sulphides and selenides of heavy metals in an oxide shell or silicate shell, in particular ZrSiO4, give more colour-stable decorations in porcelain firing, if colour-stabilising auxiliaries from the series of Zn compounds, in particular ZnO or zinc-containing glass frits, or compounds of cerium(III) or cerium(IV), especially CeO2, are employed as colour-stabilising auxiliaries in the decoration layer and/or glaze layer. The quantity employed in the decorative layer is, in the case of ZnO and CeO2, in general 5 to 50% by weight, relative to the inclusion pigment. In addition to an inclusion pigment, the pigment composition according to the invention also contains at least one of the said colour-stabilising auxiliaries.

    9.
    发明专利
    未知

    公开(公告)号：DE4216175A1

    公开(公告)日：1993-11-18

    申请号：DE4216175

    申请日：1992-05-15

    Applicant: DEGUSSA

    Inventor： SPEER DIETRICH DR ,  KISS AKOS DR ,  HORST JENNY ,  HALBRITTER GUENTER ,  LOEW RITA

    IPC: C03C8/14 ,  C04B41/86 ,  C09C3/06

    Abstract: The invention relates to a process for the preparation of decorations which are colour-stable in porcelain firing (glost firing), and to a pigment composition suitable for this purpose. Most pigments are not sufficiently colour-stable in porcelain firing. There is a need for increasing the colour stability of pigments. Inclusion pigments based on sulphides and selenides of heavy metals in an oxide shell or silicate shell, in particular ZrSiO4, give more colour-stable decorations in porcelain firing, if colour-stabilising auxiliaries from the series of Zn compounds, in particular ZnO or zinc-containing glass frits, or compounds of cerium(III) or cerium(IV), especially CeO2, are employed as colour-stabilising auxiliaries in the decoration layer and/or glaze layer. The quantity employed in the decorative layer is, in the case of ZnO and CeO2, in general 5 to 50% by weight, relative to the inclusion pigment. In addition to an inclusion pigment, the pigment composition according to the invention also contains at least one of the said colour-stabilising auxiliaries.

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