Microwave sintering method of coated superfine sulphide selenide cadmium red pigment for ceramic glaze
A technology of cadmium sulfur selenide and microwave sintering, which is applied in the field of preparation of ceramic bright red materials, can solve the problems of difficulty in ensuring product stability, affecting color stability, and high manufacturing costs, and achieves improved color stability and improved Effects of encapsulation ratio and reduction of sintering temperature
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Embodiment 1
[0010] Example 1: Using cadmium sulphur selenide powder with a particle size of 70-110nm wrapped by silica [CdSe x S [1-x] -SiO 2 ], in order to prevent the coagulation of the packaged pigment during sintering, a stable dispersant sodium hexametaphosphate was added before sintering (the addition amount was 1, 0.2‰wt, the microwave frequency was 250MHz; 2, 0.5‰wt, the microwave frequency was 2.5GHz; 3.0.8‰wt microwave frequency is 930MHz), placed in industrial microwave sintering furnace using microwave energy for sintering, microwave frequency is 2.5GHz, microwave sintering temperature is 800~15000℃, time is 0~10hr, and then cooled Baked. The color stability of the products in the three cases is good, and the hydrophilicity is enhanced. Among them, 1 basically has no condensation phenomenon, and 2 and 3 have no condensation phenomenon at all.
Embodiment 2
[0011] Example 2: This example uses OP-10 dispersant instead of sodium hexametaphosphate on the basis of Example 1, and uses cadmium sulphide selenide powder coated with zirconium silicate [CdSe x S [1-x] -ZrSiO 4 ] Substitute for cadmium sulphur selenide powder coated with silica [CdSe x S [1-x] -SiO 2 ], the added amount of OP-10 dispersant and the microwave frequency are 1, 0.2‰wt, the microwave frequency is 250GHz; 2, 0.5‰wt, the microwave frequency is 2.5GHz; 3, 0.8‰wt, the microwave frequency is 930MHz. The color stability of the products in the three cases is good, and the hydrophilicity is enhanced. Among them, 1 basically has no condensation phenomenon, and 2 and 3 are slightly better than 1.
Embodiment 3
[0012] Example 3: This example uses sodium dodecylbenzene sulfonate instead of sodium hexametaphosphate on the basis of Example 1. The addition amount of sodium dodecylbenzene sulfonate and the microwave frequency are 1, 0.2‰wt. , The microwave frequency is 250GHz; 2.0.5‰wt, the microwave frequency is 2.5GHz; 3.0.8‰wt, the microwave frequency is 930MHz. The color stability of the products in the three cases is good, and the hydrophilicity is enhanced. Among them, 1 basically has no condensation phenomenon, and 2 and 3 are slightly better than 1.
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