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Preparation method of yellow nickel tungstate ceramic pigment

A technology of ceramic pigments and yellow tungstic acid, which is applied in the field of ceramic pigments, can solve the problems that the hydrothermal method is not suitable for large-scale production, has potential safety hazards, and requires high equipment requirements, and achieves the requirements of not strict production schedule, low cost, and high chemical properties. stable effect

Inactive Publication Date: 2018-12-21
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have complex procedures and high equipment requirements, especially the hydrothermal method is not suitable for large-scale production, and there are potential safety hazards

Method used

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  • Preparation method of yellow nickel tungstate ceramic pigment
  • Preparation method of yellow nickel tungstate ceramic pigment

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Embodiment 1

[0026] A preparation method of yellow nickel tungstate ceramic pigment, comprising the following steps:

[0027] (1) Dissolve ammonium tungstate in distilled water at 80°C to obtain an ammonium tungstate solution with a pH of 8 and a concentration of 1mol / L, and dissolve citric acid in distilled water to obtain citric acid with a concentration of 3mol / L solution;

[0028] (2) Add nickel nitrate to the ammonium tungstate solution, the molar ratio of ammonium tungstate to nickel nitrate is 1:1, then add citric acid solution into the solution, and keep stirring at 80°C, the citric acid and the solution The molar ratio of the total amount of metal cations is 5:1, and PEG200 is added at the same time, the mass ratio of PEG200 and citric acid is 1:1, keep stirring and evaporate to obtain a polymer;

[0029] (3) Add vitamin E accounting for 8% of the polymer mass to the polymer obtained in step (2), and then heat-treat at 150°C for 4 hours at a heating rate of 10°C / min, cool to room...

Embodiment 2

[0034] A preparation method of yellow nickel tungstate ceramic pigment, comprising the following steps:

[0035] (1) Dissolve ammonium tungstate in distilled water at 60°C to obtain an ammonium tungstate solution with a pH of 11 and a concentration of 2mol / L, and dissolve citric acid in distilled water to obtain citric acid with a concentration of 5mol / L solution;

[0036] (2) Add nickel nitrate to the ammonium tungstate solution, the molar ratio of ammonium tungstate to nickel nitrate is 1:1, then add citric acid solution into the solution, and keep stirring at 60°C, the citric acid and the solution The molar ratio of the total amount of metal cations is 3:1, and PEG400 is added at the same time, the mass ratio of PEG400 and citric acid is 1.5:1, keep stirring and evaporate to obtain a polymer;

[0037] (3) Add vitamin C accounting for 10% of the polymer mass to the polymer obtained in step (2), then heat-treat at 200°C for 5 hours at a heating rate of 8°C / min, cool to room ...

Embodiment 3

[0041] A preparation method of yellow nickel tungstate ceramic pigment, comprising the following steps:

[0042] (1) Dissolve ammonium tungstate in distilled water at 70°C to obtain an ammonium tungstate solution with a pH of 10 and a concentration of 0.5mol / L, and dissolve citric acid in distilled water to obtain a lemon with a concentration of 6mol / L acid solution;

[0043] (2) Add nickel nitrate into the ammonium tungstate solution, the molar ratio of ammonium tungstate to nickel nitrate is 1:1, then add citric acid solution into the solution, and keep stirring at 70°C, the citric acid and the solution The molar ratio of the total amount of metal cations is 2:1, and PEG600 is added at the same time, the mass ratio of PEG600 and citric acid is 2:1, keep stirring and evaporate to obtain a polymer;

[0044] (3) Add catechins accounting for 5% of the mass of the polymer to the polymer obtained in step (2), then heat-treat at 300°C for 300 hours at a heating rate of 12°C / min, c...

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Abstract

The invention discloses a preparation method of yellow nickel tungstate ceramic pigment. The preparation method comprises the following steps: (1) preparing an ammonium tungstate solution and a citricacid solution respectively; (2) adding nickel nitrate into the ammonium tungstate solution, then adding citric acid and polyethylene glycol, and keeping stirring for evaporation to obtain a polymer;(3) adding an antioxidant accounting for 5-10% of the polymer mass into the polymer, performing heat treatment for 3-5 hours at 150-300 DEG C, cooling to room temperature, and grinding to obtain precursor powder; (4) calcining the precursor powder for 1-4 hours in air of 500-800 DEG C to obtain yellow nickel tungstate ceramic pigment powder. According to the preparation method disclosed by the invention, NiWO4 nanoparticles are synthesized by a polymer complexing way taking citric acid and polyethylene glycol as complexing agents, and the antioxidant is added to effectively inhibit oxidation of Ni<2+>; with nanoscale particle size, the prepared powder particles have the advantages of uniform distribution, large specific surface area, simple technological process, short production cycle, high production efficiency and promotion of industrial production.

Description

technical field [0001] The invention belongs to the technical field of ceramic pigments, and in particular relates to a preparation method of yellow nickel tungstate ceramic pigments. Background technique [0002] Inorganic pigments have excellent acid and alkali corrosion resistance, structural stability and thermal stability, and are widely used in the manufacture of ceramics, enamel, paint, rubber and artificial leather. Yellow inorganic pigments such as chromates of alkaline earth metal ions (such as calcium, strontium, barium), Naples yellow (lead antimonite), gray stone (lead oxide), yellow cadmium (cadmium sulfide), etc., due to their special color, Widely used in ceramics. However, the commercial use of these pigments has been limited due to the toxicity of the elements chromium, cadmium, antimony, and lead. Therefore, there is an urgent need to develop sustainable and environmentally friendly inorganic pigments and reduce the toxicity of existing inorganic pigment...

Claims

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Application Information

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IPC IPC(8): C09C1/00
CPCC09C1/0009
Inventor 张乐康健甄方正孙炳恒单迎双高光珍陈浩
Owner XUZHOU NORMAL UNIVERSITY
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