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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: 2011-08-31
佛山市中国地质大学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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] Embodiment 1: adopt the cadmium sulfur selenide powder body [CdSe that is 70-110nm that is wrapped by silicon dioxide x S ［１－ｘ］ -SiO 2 ], in order to prevent the coagulation of the packaged pigment during sintering, the stabilized 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), put it into an industrial microwave sintering furnace and use microwave energy for sintering. out of the oven. The products in the three cases have good color stability and enhanced hydrophilicity, among which 1 basically has no condensation phenomenon, and 2 and 3 have no condensation phenomenon at all.

Embodiment 2

[0011] Example 2: In this example, on the basis of Example 1, OP-10 dispersant is used instead of sodium hexametaphosphate, and cadmium sulfur selenide powder wrapped by zirconium silicate [CdSe x S ［１－ｘ］ -ZrSiO 4 ] instead of cadmium sulfide selenide powder wrapped in silica [CdSe x S ［１－ｘ］ -SiO 2 ], the amount of OP-10 dispersant and the microwave frequency were 1, 0.2‰wt, the microwave frequency was 250GHz; 2, 0.5‰wt, the microwave frequency was 2.5GHz; 3, 0.8‰wt, the microwave frequency was 930MHz. The products in the three cases have good color stability and enhanced hydrophilicity, among which 1 basically has no condensation phenomenon, and 2 and 3 are slightly better than 1.

Embodiment 3

[0012] Embodiment 3: This embodiment replaces sodium hexametaphosphate with sodium dodecylbenzene sulfonate on the basis of embodiment 1, and the addition amount of sodium dodecylbenzene sulfonate and microwave frequency are 1, 0.2‰wt respectively , the microwave frequency is 250GHz; 2. 0.5‰wt, the microwave frequency is 2.5GHz; 3. 0.8‰wt microwave frequency is 930MHz. The products in the three cases have good color stability and enhanced hydrophilicity, among which 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] Encapsulated cadmium sulfur selenide bright red material [CdSe x S ［１－ｘ］ -SiO 2 ] It has the unique bright color of cadmium sulfur selenide pigment, and also has strong color stability, and can be widely used in ceramic products. However, the encapsulation rate of the 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 molten state, affecting 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 Disc...

Claims

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Application Information

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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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