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.

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.