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

Inactive Publication Date: 2013-06-12
佛山市中国地质大学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the encapsulation rate of traditional wrapped cadmium sulfoselenide bright red material is not high, and the silicon dioxide protective layer wrapped outside the cadmium sulfoselenide mixed crystal will be dissolved in the high temperature melting state, which will affect the color stability
For this reason, it is necessary to increase the reaction rate and reduce the sintering temperature of the glaze, but it is difficult to achieve this with the commonly used resistance heating method, and it is difficult to guarantee the stability of the product after sintering. For this reason, the patent 200510032441.0 Disclosed is the microwave sintering method used to burn the wrapped ultrafine cadmium sulfoselenide scarlet material for ceramic glazes. During manufacture, zirconium silicate is fused and wrapped on the outer surface of the cadmium sulfoselenide scarlet material by using the microwave sintering method. Although this method can achieve the ideal wrapping effect and color stability, it is prone to condensation during sintering. Zirconium silicate is used as the wrapper. Since zirconium silicate is a rare and expensive mineral, , high manufacturing cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/86
Inventor 皮振邦田熙科杨超包楚才
Owner 佛山市中国地质大学研究院
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