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Preparation method of zirconium silicate covered ceramic pigment taking ammonium zirconium carbonate as zirconium source and product prepared by preparation method

A technology of ammonium zirconium carbonate and ceramic pigments, which is applied in chemical instruments and methods, fibrous fillers, inorganic pigment treatment, etc., and can solve the problems of alkali resistance and acid resistance, reducing the proportion of colorants in color materials, light color of color materials, etc. , to achieve high wrapping rate and improve the effect of color depth

Active Publication Date: 2017-07-07
JINGDEZHEN CERAMIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing technology has improved the use effect by strengthening the mixing of zirconium silicate and toner, the encapsulation rate of zirconium silicate has been improved, but there are still the following technical defects: (1) the above-mentioned encapsulation rate is increased by increasing silicic acid The proportion of zirconium is achieved, which will inevitably lead to the colorant being wrapped by a thick layer of zirconium silicate, which greatly reduces the proportion of the colorant in the color material, thus affecting the color of the colorant, and the color of the resulting color material is lighter
(2) Most ceramic pigments are metal oxides, which have the characteristics of alkali resistance and acid resistance
With zirconium tetrachloride or zirconium oxychloride as the source of zirconium, whether it is an aqueous solution or a sol, it is acidic and will react with cadmium sulfoselenide or Fe 2 o 3 A chemical reaction occurs to destroy the colorant, even if zirconium oxychloride and zirconium tetrachloride are prepared into ZrO 2 Sol, ZrO 2 The pH value of the sol is about 3 to 5, and it will still interact with cadmium sulfoselenide or Fe 2 o 3 A chemical reaction occurs, so it is difficult to synthesize a zirconium silicate-wrapped ceramic pigment with a core-shell structure

Method used

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  • Preparation method of zirconium silicate covered ceramic pigment taking ammonium zirconium carbonate as zirconium source and product prepared by preparation method

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Experimental program
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Effect test

Embodiment 1

[0023] In this embodiment, a method for preparing zirconium silicate wrapped ceramic pigments using ammonium zirconium carbonate as a source of zirconium, the steps are as follows:

[0024] (1) 10g carbon black, 0.5g 10wt% PEG-200 solution and 200mL water were vigorously stirred to form a stable suspension, and then added to 200mL concentration of zirconium ammonium carbonate solution of 25wt% (containing 19wt% ZrO in the solution after conversion) 2 ), stirred evenly and placed in a 55°C oven for 4 hours to form a zirconia-coated powder suspension; after being completely dried in a 150°C oven, crush it with a crusher to obtain a zirconia-coated carbon black powder;

[0025] (2) Add the above 10g of zirconia-wrapped carbon black powder to 20g of silica sol with a concentration of 30wt%, mix evenly, adjust the pH value to 9 with dilute ammonia water, form a gel, and heat to 150°C to dry to obtain a ceramic colorant Precursor;

[0026] (3) Add lithium fluoride in an amount of 3...

Embodiment 2

[0029] In this embodiment, a method for preparing zirconium silicate wrapped ceramic pigments using ammonium zirconium carbonate as a zirconium source differs from Example 1 in that:

[0030] In step (1), ammonium zirconium carbonate solution contains 20wt% ZrO 2 ; The formed zirconia-encapsulated powder suspension is not dried or pulverized.

[0031] In step (2), the zirconia-coated powder suspension formed in step (1) is added to 100 g of silica sol with a concentration of 30 wt % and mixed evenly.

[0032] The encapsulation rate of the zirconium silicate wrapped carbon black material powder prepared in this embodiment is 85%, the mass ratio of carbon black in the finished color material product in the finished color material is 10.8%, and the chromaticity is: L*=23.81, a* = -0.51, b* = -0.13.

Embodiment 3

[0034] In this embodiment, a method for preparing zirconium silicate wrapped ceramic pigments using ammonium zirconium carbonate as a source of zirconium, the steps are as follows:

[0035] (1) 10g cadmium sulfoselenide (commercially available unwrapped cadmium selenide red material), 0.5g PEG-200 solution, 50g water and 50g ammonium zirconium carbonate solution (containing 20wt% ZrO 2 ), stirred rapidly to form a stable suspension, placed in a 55°C oven for 8 hours to form a zirconia-coated powder suspension; after being completely dried in a 150°C oven, crushed with a crusher to obtain zirconia-coated cadmium selenide sulfur powder body;

[0036] (2) Add 20 g of silica sol with a concentration of 30 wt % to the above-mentioned zirconia-wrapped cadmium selenide powder and mix evenly, adjust the pH value to 9 with dilute ammonia water, form a gel, and microwave-dry to obtain a ceramic pigment precursor;

[0037] (3) Add lithium fluoride in an amount of 3wt% to the above-mention...

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Abstract

The invention discloses a preparation method of a zirconium silicate covered ceramic pigment taking ammonium zirconium carbonate as a zirconium source. The preparation method comprises the following steps: firstly, after dispersing powder of a coloring agent, uniformly stirring the coloring agent and an ammonium zirconium carbonate solution to form a stable suspension solution; reacting to form sedimentation on surfaces of coloring agent particles, so as to obtain a zirconium oxide inclusion; adding the zirconium oxide inclusion into a silicon source solution and uniformly mixing; adjusting the pH (Potential of Hydrogen) value to obtain sediment; drying the sediment to obtain a ceramic pigment precursor; calcining the ceramic pigment precursor and removing the uncovered coloring agent so as to obtain the zirconium silicate covered ceramic pigment powder. Furthermore, the invention further discloses a product prepared by the preparation method. By adopting the preparation method disclosed by the invention, damages to the ceramic pigment can be avoided and the covered pigment with high covering ratio and a core-shell structure is formed; the problem that the high covering ratio of the zirconium silicate covered ceramic pigment is incompatible with a low ratio of the coloring agent to the pigment is effectively solved, so that the color-causing depth of the covered pigment is effectively improved and the adding amount in a utilization process is reduced.

Description

technical field [0001] The invention relates to the technical field of ceramic pigments, in particular to a method for preparing packaged ceramic pigments and a product thereof. Background technique [0002] Zirconium silicate ZrSiO 4 It has the characteristics of high melting point, high refractive index, stable chemical properties, and high temperature melt resistance. It has become the preferred coating material for coating ceramic pigments. It is suitable for cadmium sulfur selenide, carbon black, Fe 2 o 3 The package of isochromatic agent has good application effect. However, in the prior art, zirconium silicate-wrapped ceramic pigments generally have problems such as low colorant encapsulation rate and low proportion of colorant to the colorant. During the method, due to the non-hydrophilic characteristics of carbon black, the wrapping rate of the prepared wrapped carbon black material is much lower than 8-11%, and the unwrapped carbon black can only be removed by s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/06
CPCC09C1/0012C09C3/063
Inventor 常启兵汪永清汪其堃王霞张小珍周健儿
Owner JINGDEZHEN CERAMIC UNIV
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