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    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.

    6.
    发明专利
    未知

    公开(公告)号：DE59201744D1

    公开(公告)日：1995-05-04

    申请号：DE59201744

    申请日：1992-02-18

    Applicant: DEGUSSA

    Inventor： SPEER DIETRICH DR ,  KISS AKOS DR ,  KLEINSCHMIT PETER PROF ,  HORST JENNY ,  ZELL CHRISTEL

    IPC: C09C1/34 ,  C01B33/00 ,  C04B35/26 ,  C04B35/48 ,  C09C1/00

    Abstract: The invention relates to occlusion pigments based on zirconium silicate as the covering substance and chromium(III) oxide as a discretely occluded coloured compound. The occluded Cr2O3 has a D50 value of 0.1 to 3.0 mu m and is a brilliant light green. Compared with non-occluded Cr2O3 having the same D50 value, the pigments according to the invention can be used without trouble for the production of decorations. They are also suitable for direct printing and high-temperature firing-on processes. The pigments are produced by calcining a mixture of zirconium dioxide, silicon dioxide, mineralisers and chromium oxide.

    7.
    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.

    8.
    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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