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A kind of calcium-doped cobalt aluminate blue nano pigment and preparation method thereof

A technology of cobalt aluminate and blue, which is applied in the direction of nanotechnology, chemical instruments and methods, cobalt compounds, etc., and can solve the problems of cost constraints on the development of cobalt blue materials and the lack of rare mineral resources.

Active Publication Date: 2018-11-23
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the further shortage of rare mineral resources in recent years, the development of existing cobalt blue materials has been largely restricted in terms of cost. Therefore, it is imminent to develop high-performance inorganic blue color materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Weigh 2.32g cobalt nitrate hexahydrate, 7.50g aluminum nitrate nonahydrate and 0.47g calcium nitrate tetrahydrate respectively according to the molar ratio of Co:Al:Ca 0.8:2:0.2, then add 100ml of distilled water to mix and dissolve, continuously Stir to completely dissolve the solids to obtain a well-mixed solution;

[0015] (2) Next, weigh 6.65g of acrylamide and 0.65g of N,N'-methylenebisacrylamide powder respectively at a molar ratio of 22:1, and add them to the mixed solution prepared in step (1), Stir continuously for 1 hour to completely dissolve the solid to obtain a uniformly mixed solution;

[0016] (3) Weigh 8g of ammonium persulfate and 1ml of N,N,N',N'-tetramethylethylenediamine and add them to the step

[0017] In the mixed solution of (2), after stirring and mixing evenly, stand at 30° C. for 2 hours to form a gel;

[0018] (4) Place the gel prepared in step (3) in an oven at 100°C for 3 hours to dry to obtain a xerogel, and pulverize the obtained x...

Embodiment 2

[0022] (1) Weigh 1.46g cobalt nitrate hexahydrate, 7.50g aluminum nitrate nonahydrate and 1.18g calcium nitrate tetrahydrate respectively according to the molar ratio of Co:Al:Ca 0.5:2:0.5, then add 150ml of distilled water to mix and dissolve, continuously Stir to completely dissolve the solids to obtain a well-mixed solution;

[0023] (2) Next, weigh 6.59g of acrylamide and 0.71g of N,N'-methylenebisacrylamide powder at a molar ratio of 20:1, and add them to the mixed solution prepared in step (1), Stir continuously for 1.5h to completely dissolve the solid to obtain a uniformly mixed solution;

[0024] (3) Weigh 15 g of ammonium persulfate and 3 ml of N, N, N', N'-tetramethylethylenediamine and add them to the mixed solution of step (2), stir and mix evenly, Stand for 1h to form a gel;

[0025] (4) Place the gel prepared in step (3) in an oven at 120° C. to dry for 2 hours to obtain a xerogel, and pulverize the obtained xerogel to obtain a precursor powder;

[0026] (5) ...

Embodiment 3

[0029] (1) Weigh 0.58g cobalt nitrate hexahydrate, 7.50g aluminum nitrate nonahydrate and 1.89g calcium nitrate tetrahydrate respectively according to the molar ratio of Co:Al:Ca 0.2:2:0.8, then add 200ml of distilled water to mix and dissolve, continuously Stir to dissolve the solid completely and mix the solution evenly;

[0030] (2) Next, weigh 6.51g of acrylamide and 0.79g of N,N'-methylenebisacrylamide powder respectively at a molar ratio of 18:1, and add them to the mixed solution prepared in step (1), Stir continuously for 2 hours to completely dissolve the solids to obtain a uniformly mixed solution;

[0031] (3) Weigh 12 g of ammonium persulfate and 3 ml of N, N, N', N'-tetramethylethylenediamine and add them to the mixed solution of step (2), stir and mix evenly, Stand still for 0.5h to form a gel;

[0032] (4) Place the gel prepared in step (3) in an oven at 100°C to dry for 2 hours to obtain a dry gel, and pulverize the obtained dry gel to obtain a powder precurs...

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Abstract

The present invention relates to a novel calcium-doped cobalt aluminate blue nanometer pigment and a preparation method thereof, wherein the novel calcium-doped cobalt aluminate blue nanometer pigment has a chemical general formula: Co1-xCaxAl2O4 (x is more than 0 and is less than 0.9). The preparation method comprises: respectively weighing cobalt nitrate, aluminum nitrate and calcium nitrate according to a molar ratio of Co to Al to Ca of (1-X):2:X (X is more than 0 and is less than 0.9), preparing into a mixed solution, respectively adding acrylamide adopted as a polymerization agent and a N,N'-methylenebisacrylamide monomer adopted as a polymerization agent to the mixed solution, stirring, respectively adding ammonium persulfate and N,N,N',N'-tetramethylethylenediamine to the mixed solution, initiating a polymerization reaction to form a gel, drying the obtained gel, crushing, calcining, and cooling to a room temperature to obtain the novel calcium-doped cobalt aluminate blue nanometer pigment.

Description

Technical field: [0001] The invention belongs to the field of color materials for ceramic decoration, and in particular relates to a calcium-doped cobalt aluminate blue nano color material and a preparation method thereof. Background technique: [0002] Cobalt blue crystal belongs to spinel structure, and its simplest chemical formula is CoAl 2 o 4 , also known as cobalt aluminate. The temperature resistance of cobalt blue pigment reaches 1200-1400℃, which is beyond the reach of ordinary pigments; at the same time, it has excellent hiding power, strong tinting power and dispersibility; excellent outdoor light resistance, weather resistance and high temperature resistance; Good acid resistance, alkali resistance, resistance to various solvents and chemical corrosion; and has no permeability, no migration; and has good compatibility with most thermoplastic and thermosetting plastics; also has anti-infrared function, widely used in coils Steel coatings, engineering plastics,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/00B82Y40/00
CPCC01G51/006C01P2004/64C01P2006/62C01P2006/63C01P2006/64
Inventor 张垠李云周念莺
Owner NANJING TECH UNIV
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