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Preparation method of purple ceramic pigment with cobalt-silicon olivine structure

A technology of olivine structure and ceramic pigment, applied in the field of ceramic pigment, can solve the problems of unsuitability for industrial application, long ball milling time, large powder particles, etc. Effect

Active Publication Date: 2015-10-28
景德镇市国熙瓷业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently CoO-SiO 2 The preparation method of the system is mainly solid-phase mixing method, that is, cobalt tetroxide and silicon dioxide are directly mixed and calcined. The temperature of this method must be above 1200°C. If the temperature is low, the reaction will be incomplete, and The ball milling time is long, and the obtained powder particles are relatively large, which is not suitable for industrial application

Method used

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  • Preparation method of purple ceramic pigment with cobalt-silicon olivine structure
  • Preparation method of purple ceramic pigment with cobalt-silicon olivine structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Dissolve 4.80 g of cobalt chloride hexahydrate in 5 mL of deionized water, stir to dissolve; then add 20 mL of ethyl orthosilicate to 20 mL of ethanol and 30 mL of deionized aqueous solution, heat and stir in a water bath at 60 ° C, so that the ethyl orthosilicate is fully alcoholized solution and hydrolysis; add the prepared cobalt chloride hexahydrate solution dropwise into the silica sol, after complete dropwise addition, continue to stir in a water bath at 60°C, add 5wt% mineralizer NaF, and adjust the pH value of the system with hydrochloric acid 1, continue to stir until a stable cobalt-silica gel system is formed, dry to obtain the initial dry gel powder, then calcinate the powder at 1000°C for 2 hours, and cool to obtain a uniformly distributed cobalt-silica olivine purple color material.

Embodiment 2

[0029] Dissolve 1.92 g of cobalt chloride hexahydrate in 5 mL of deionized water, stir to dissolve; then add 20 mL of ethyl orthosilicate to 20 mL of ethanol and 30 mL of deionized aqueous solution, heat and stir in a water bath at 60 ° C, so that the ethyl orthosilicate is fully alcoholized solution and hydrolysis; add the prepared cobalt chloride hexahydrate solution dropwise into the silica sol, after complete dropwise addition, continue to stir in a water bath at 60°C, and adjust the pH of the system to 6 with 3M NaOH solution until a stable cobalt The silica gel system is dried to obtain the initial powder, and then the powder is calcined at 1000°C for 1 hour, and then cooled to obtain a cobalt-silicon olivine purple pigment with uniform distribution and bright color.

Embodiment 3

[0031] Dissolve 4.80 g of cobalt chloride hexahydrate in 5 mL of deionized water, stir to dissolve; then add 20 mL of ethyl orthosilicate to 20 mL of ethanol and 30 mL of deionized aqueous solution, heat and stir in a water bath at 60 ° C, so that the ethyl orthosilicate is fully alcoholized solution and hydrolysis; add the prepared cobalt chloride hexahydrate solution dropwise into the silica sol, after complete dropwise addition, continue to stir in a water bath at 60°C, add 5wt.% mineralizer NaF, and adjust the pH of the system with hydrochloric acid The value is 1 until a stable cobalt-silica gel system is formed, dried to obtain the initial powder, and then the powder is calcined at 1200°C for 1 hour, and cooled to obtain a cobalt-silicon olivine purple pigment with a good reddish hue.

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Abstract

The invention discloses a preparation method of a purple ceramic pigment with a cobalt-silicon olivine structure. The preparation method comprises the following steps: tetraethoxysilane and cobalt chloride hexahydrate are taken as main raw materials to prepare sol under the water-bath heating condition according to different cobalt-silicon ratios, and the sol is calcined within the wider temperature range of 1000-1300 DEG C through adding a mineralizer and adjusting the pH value of the system, so that the purple ceramic pigment with the Co2SiO4 olivine crystal structure is obtained. Compared with the traditional solid-phase method, the synthetic method has the characteristics of being simple in technology, low in equipment requirement, convenient to operate, and low in synthesis temperature, the ball milling process is not required, and the pollution caused by impurities is avoided, so that the preparation method has a wide market space.

Description

Technical field [0001] The invention belongs to the technical field of ceramic colorants, and specifically relates to a method for preparing a purple ceramic colorant with a cobalt-silicon olivine structure. Background technique [0002] With the improvement of people's material living standards, the quality requirements and demand for ceramic products are gradually increasing. The variety of ceramics is increasing day by day, resulting in an increasing demand for colorful ceramic decoration. Purple material is a member of a large family of ceramic decorative colors. In the early days, it mainly relied on imports, and there were few domestic reports on it. There have also been people who used red and blue tones as color combinations, but they were never so natural and pure and were eliminated. And CoO-SiO 2 The pigment of the series is cobalt silicate with an olivine structure. The color is a unique peach-like purple. The color is bright, natural and soft, and has excellen...

Claims

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Application Information

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IPC IPC(8): C04B41/85
Inventor 陈云霞邹发华曾涛苏小丽宗靖卫诗倩
Owner 景德镇市国熙瓷业有限公司
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