METHOD FOR PRODUCING CERAMIC PIGMENT BASED ON NATURAL MINERALS

• Main Authors: NEVOLIN V.M, POGREBENKOV V.M, SEDEL'NIKOVA M.B
• Format: Patent
• Language: English; Russian
• Published: 10.07.2005
• Edition: 7
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; LIME, MAGNESIA; METALLURGY; MINERAL OR SLAG WOOL; REFRACTORIES; SLAG; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TREATMENT OF NATURAL STONE

FIELD: ceramics. ^ SUBSTANCE: invention relates to a method for producing ceramic pigments for decoration of porcelain and faience articles and for staining ceramic masses and glazes. Mixture of mineral powder and chromophore solution in the concentration 4.0-15.6 g-ions/100 g of solution is subjected for hydrothermal treatment (autoclaving) at temperature 170-190°C and under pressure 0.8-1.2 MPa. Deposit is squeezed out, dried and roasted at temperature 950-1100°C. Mineral is taken among the group: diopside, wollastonite, tremolite and zeolite. Metal salts of 3-d subgroup of periodic system are used as chromophores. This method provides reducing the roast temperature of pigments as compared with the conventional one by 200-300°C and to enhanced their brightness due to the more intensive penetration of chromophore ions into mineral structure being at the stage of hydrothermal treatment. Prepared pigments are resistant to effect of high temperatures and melted glaze. ^ EFFECT: improved method for producing, improved properties of pigments. ^ 3 tbl, 1 ex