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    11.
    发明专利
    未知

    公开(公告)号：ES2070540T3

    公开(公告)日：1995-06-01

    申请号：ES92102645

    申请日：1992-02-18

    Applicant: DEGUSSA

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

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

    17.
    发明专利
    未知

    公开(公告)号：BR9203639A

    公开(公告)日：1993-04-06

    申请号：BR9203639

    申请日：1992-09-17

    Applicant: DEGUSSA

    Inventor： SPEER DIETRICH DR ,  KISS AKOS DR ,  HORST JENNY

    IPC: C01G37/14 ,  C01G37/00 ,  C03C8/14 ,  C04B35/42 ,  C04B41/50 ,  C04B41/65 ,  C09C1/34 ,  C09C3/00

    Abstract: The invention relates to novel brown spinel pigments on the basis of zinc chromite, which are iron-free and have an atomic ratio of chromium to zinc in the region between 1 to greater than 0.5 and 1 to 2. Preferred pigments additionally contain manganese, the atomic ratio Mn to Cr being at most 0.2. … The preparation of the pigments comprises a roasting process of a powder mixture comprising the oxides or precursors thereof of the metals contained in the pigment. By virtue of the molar ratio chosen and a roasting temperature above 1200 DEG C, attractive brown pigments are obtained instead of the previously known grey-green unattractive products. … The novel pigments can be used, in the presence of glass frits, even at firing temperatures above 1200 DEG C to 1500 DEG C and are suitable for joint firing of substrate and pattern.

    18.
    发明专利
    未知

    公开(公告)号：DE4131548A1

    公开(公告)日：1993-03-25

    申请号：DE4131548

    申请日：1991-09-21

    Applicant: DEGUSSA

    Inventor： SPEER DIETRICH DR ,  KISS AKOS DR ,  HORST JENNY

    IPC: C01G37/14 ,  C01G37/00 ,  C03C8/14 ,  C04B35/42 ,  C04B41/50 ,  C04B41/65 ,  C09C1/34

    Abstract: The invention relates to novel brown spinel pigments on the basis of zinc chromite, which are iron-free and have an atomic ratio of chromium to zinc in the region between 1 to greater than 0.5 and 1 to 2. Preferred pigments additionally contain manganese, the atomic ratio Mn to Cr being at most 0.2. … The preparation of the pigments comprises a roasting process of a powder mixture comprising the oxides or precursors thereof of the metals contained in the pigment. By virtue of the molar ratio chosen and a roasting temperature above 1200 DEG C, attractive brown pigments are obtained instead of the previously known grey-green unattractive products. … The novel pigments can be used, in the presence of glass frits, even at firing temperatures above 1200 DEG C to 1500 DEG C and are suitable for joint firing of substrate and pattern.

    19.
    发明专利
    未知

    公开(公告)号：PT87661B

    公开(公告)日：1992-10-30

    申请号：PT8766188

    申请日：1988-06-06

    Applicant: DEGUSSA

    Inventor： KLEINSCHMIT PETER ,  KISS AKOS ,  HANICH JURGEN ,  HALBRITTER GUNTER ,  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.

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