Microwave sintering method of coated superfine sulphide selenide cadmium red pigment for ceramic glaze

Abstract

A microwave sintering method of a coated superfine sulphide selenide cadmium red pigment for ceramic glaze is characterized in that sulphide selenide cadmium powder [CdSexS[1-x]-SiO2] coated with silica is used; 0.2-0.8 per mill by weight of sodium hexametaphosphate or OP-10 dispersant or sodium dodecyl benzene sulfonate is added before sintering; the microwave sintering mode is adopted, wherein the microwave frequency is 250MHz-250GHz, the microwave sintering temperature is 800-1500 DEG C, the sintering time is 0-10hr; and the pigment is discharged from the furnace after temperature preservation. Compared with the prior art, the method has the following advantages: the aggregation phenomenon of the coated pigment can be effectively prevented in the sintering process and the manufacturingcost is low.

Description

Technical field

[0001] The invention relates to a preparation method of ceramic bright red material. Background technique

[0002] Wrapped cadmium sulphur selenide bright red color [CdSe x S [1-x] -SiO 2 ] It has the unique bright color of cadmium sulphur selenide pigment and strong color stability, which can be widely used in ceramic products. However, the traditional encapsulated cadmium sulphide selenide red material has a low encapsulation rate, and it will dissolve the silicon dioxide protective layer wrapped on the cadmium sulphide selenide mixed crystal in a high-temperature molten state, which affects the color stability. For this reason, it is necessary to increase the reaction rate and reduce the sintering temperature of the glaze. The current commonly used resistance heating method is difficult to achieve this, and it is difficult to ensure the stability of the product after sintering. For this reason, patent 200510032441.0 The microwave sintering method is used to f...