Preparation method of zirconium silicate wrapped high-temperature sulfur cadmium selenide bright red pigment

A technology of cadmium sulfoselenide and zirconium silicate, which is applied in the field of pigments, can solve the problems of high sintering temperature and long synthesis time, and achieve the effects of low preparation cost, shortened synthesis time, and shortened washing time

Active Publication Date: 2012-06-27
JIANGSU MIRAFUL NANO MATERIAL CO LTD
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  • Description
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Problems solved by technology

[0005] The object of the present invention is to provide a method for preparing zirconium silicate-wrapped high-sulfur selenium flower cadmium scarlet pigment in view of the problems existing in the prior art, which solves the problems of high sintering temperature and long synthesis time in the prior art. question

Method used

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preparation example Construction

[0017] The invention provides a preparation method of zirconium silicate-wrapped high-sulfur selenium cadmium scarlet pigment, the process principle is: the formation temperature of cadmium sulfur selenide mixed crystal is very different from the formation temperature of stable and transparent zirconium silicate in glaze Large, when the two are synthesized at high temperature, the two do not undergo a second-generation reaction, and the high-temperature unstable cadmium sulfoselenide mixed crystal is immediately sandwiched in the zirconium silicate crystal that does not participate in the mixed crystal (forming a coating), so that the sulfoselenide The good color characteristics of cadmium combined with the high temperature stability of zirconium silicate result in a stable scarlet pigment (pigment). Its process steps mainly include:

[0018] 1. Gel synthesis section: Selenium powder dissolution, chromium gel formation, high gel formation and silica gel formation.

[0019] 2....

Embodiment 1

[0024] Step 1. Prepare an acid solution according to the following components (percentage by weight): dissolve cadmium sulfate in water and mix it with an aqueous solution of zirconium oxychloride, wherein cadmium sulfate: zirconium oxychloride: water = 6%: 22%: 72%.

[0025] Step 2. Preparation of alkaline solution: Dissolve sodium sulfide in water, add caustic soda and selenium powder, stir and dissolve at 20-40°C, the optimum temperature is controlled at 30°C, wherein sodium sulfide: caustic soda: selenium powder: water=6.5%: 8.5%: 1%: 84%.

[0026] Step 3. Synthesis of gel solution: Add the prepared acidic solution and alkaline solution dropwise into a reaction kettle containing an appropriate amount of water while stirring, and control the pH value from 7.5 to 8.5. The optimal pH value is 8.

[0027] Step 4. Silica gelation: filter the gel liquid through the filter cake, add water to make a slurry, stir for 2 hours, add water glass to the reaction kettle, where by weight ...

Embodiment 2

[0032] Step 1. Prepare an acidic solution according to the following components (percentage by weight): dissolve cadmium sulfate in water and mix it with an aqueous solution of zirconium oxychloride, wherein cadmium sulfate: zirconium oxychloride: water = 10%: 23%: 67%.

[0033] Step 2. Preparation of alkaline solution: Dissolve sodium sulfide in water, add caustic soda and selenium powder, stir and dissolve at 20-40°C, the optimum temperature is controlled at 30°C, wherein sodium sulfide: caustic soda: selenium powder: water=6.5%: 8.5%: 1%: 84%.

[0034] Step 3. Synthesis of gel solution: Add the prepared acidic solution and alkaline solution dropwise into a reaction kettle containing an appropriate amount of water while stirring, and control the pH value to 8.

[0035] Step 4, with step 4 of embodiment 1.

[0036] Step 5, drying ingredients: dry the silicone gel at 110°C, add lithium fluoride, ammonium fluoride and sodium fluorosilicate, and the ratio is: silicone gel: lith...

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Abstract

The invention relates to a preparation method of zirconium silicate wrapped high-temperature sulfur cadmium selenide bright red pigment, which comprises the following steps that: acid and alkaline solution is first prepared; then gel is synthesized; ingredients are dried; a cadmium red pigment protective layer zirconium silicate is generated after calcination and synthesis; acid and alkali treatment is carried out, and cadmium red pigment which is not wrapped is removed by acid and alkali, so that the product coloring quality is not affected when the pigment is used in high-temperature glaze.The preparation method of the zirconium silicate wrapped high-temperature sulfur cadmium selenide bright red pigment solves the problems of the prior art that the sintering temperature is quite high and the synthesis time is quite long, the prepared bright red pigment has bright colors, the washing time and the synthesis time are shortened, the preparation cost is low, and wide market prospect isrealized.

Description

technical field [0001] The invention relates to the technical field of pigments, in particular to a preparation method of zirconium silicate-wrapped high-temperature cadmium sulfoselenide scarlet pigment. Background technique [0002] With the rapid development of the ceramic industry, people's requirements for ceramic decoration have been continuously improved, and the demand for bright red pigments has increased sharply, and the domestic and international market prospects are very broad. [0003] The high-temperature wrapped series of pigments are made of zirconium silicate wrapped with high-temperature unstable sulfur-selenium-flower-cadmium mixed crystals to form stable and bright colors, which completely solves the situation of domestic imports. Cadmium sulfur selenide pigment is the only pigment that can produce a bright red tone among ceramic pigments. Cadmium sulfur selenide pigment has strong coloring power and rich colors. It has played an important role in ceramic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/85
Inventor 范良成张慧娟范盘华
Owner JIANGSU MIRAFUL NANO MATERIAL CO LTD
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