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SnO2/Ag nanometer composite powder and preparation method thereof

A nanocomposite powder and composite powder technology, which is applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of easy aggregation of nanoparticles, complex preparation process, poor crystallinity, etc., to achieve Good dispersibility, low preparation temperature and good crystallinity

Inactive Publication Date: 2015-03-11
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the preparation methods of cermet nanocomposite powder mainly include: mechanical alloying method, alloy internal oxidation method, electroless plating method, etc., but there are several problems in the preparation process of nanocomposite powder: nanoparticles are easy to agglomerate, poor dispersion , poor crystallinity, complex preparation process, high cost, etc.

Method used

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  • SnO2/Ag nanometer composite powder and preparation method thereof
  • SnO2/Ag nanometer composite powder and preparation method thereof
  • SnO2/Ag nanometer composite powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Dissolve 2.265g of stannous chloride in 100 ml of deionized water to make a transparent solution of 0.1mol / L stannous chloride;

[0028] 2) Dissolve 1.699g of silver nitrate in 100 ml of deionized water to make a 0.1mol / L silver nitrate solution; then slowly add the silver nitrate solution into the transparent stannous chloride solution and keep stirring to obtain a milky white precipitate;

[0029] 3) Slowly add ammonia water with a mass percentage of 10% to the milky white precipitate at a rate of 1ml / s and keep stirring. After the reaction, the pH of the system is 12, and a brown precipitate is obtained;

[0030] 4) The tan precipitate obtained in step 3) was alternately washed three times with deionized water and absolute ethanol, and the obtained product was dried at 80°C to obtain the precursor powder;

[0031] Sinter the precursor powder obtained in step 4) at 700°C for 3h in an air atmosphere to obtain SnO 2 / Ag nanocomposite powder.

[0032] The above prep...

Embodiment 2

[0038] 1) Dissolve 1.132g of stannous chloride in 100 ml of deionized water to make a transparent solution of 0.05mol / L stannous chloride;

[0039] 2) Dissolve 1.699g of silver nitrate in 100 ml of deionized water to make a 0.1mol / L silver nitrate solution; then slowly add the silver nitrate solution into the transparent stannous chloride solution and keep stirring to obtain a milky white precipitate;

[0040] 3) Slowly add ammonia water with a mass percentage of 10% to the milky white precipitate at a rate of 1ml / s and keep stirring. After the reaction, the pH of the system is 9, and a brown precipitate is obtained;

[0041] 4) The tan precipitate obtained in step 3) was alternately washed three times with deionized water and absolute ethanol, and the obtained product was dried at 80°C to obtain the precursor powder;

[0042]The precursor powder obtained in step 4) was sintered at 600 °C for 3 hours in an air atmosphere to obtain SnO with an average particle size of 35 nm and...

Embodiment 3

[0048] 1) Dissolve 2.13 g of sodium stannate in 100 ml of deionized water to make a transparent solution of 0.1mol / L sodium stannate;

[0049] 2) Dissolve 2.016g of silver nitrate in 126ml of deionized water to make a 0.1mol / L silver nitrate solution; then slowly add the silver nitrate solution into the transparent sodium stannate solution and keep stirring to obtain a yellow-brown precipitate;

[0050] 3) Slowly add ammonia water with a mass percentage of 5% to the yellow-brown precipitate at a rate of 1ml / s and keep stirring. After the reaction, the pH of the system is 8, and a tan precipitate is obtained;

[0051] 4) The tan precipitate obtained in step 3) was alternately washed three times with deionized water and absolute ethanol, and the obtained product was dried at 80°C to obtain the precursor powder;

[0052] The precursor powder obtained in step 4) was sintered in an air atmosphere at 600°C for 3 hours to obtain a dispersedly distributed nanocomposite powder with an ...

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Abstract

The present invention relates to good-dispersity SnO2 / Ag nanometer composite powder and a preparation method thereof. The preparation method comprises: adopting soluble inorganic salts SnCl2.2H2O and AgNO3 as raw materials, respectively preparing solutions with a certain concentration, mixing according to a certain ratio to obtain milky white precipitate, adding ammonia water to the precipitate to adjust the pH value so as to obtain brown precipitate, and finally carrying out washing, drying and sintering on the obtained precipitate to obtain the SnO2 / Ag nanometer composite powder. According to the present invention, the diffused distribution of the nano-SnO2 in the composite powder is achieved through the liquid phase precipitation method, such that the problem of easy agglomeration of the nanoparticle in the conventional powder metallurgy method is avoided; and the method of the present invention has characteristics of simple process, energy saving, time saving, and broad application prospects, and is suitable for industrial production and promotion.

Description

technical field [0001] The invention belongs to the field of preparation technology and application of metal / ceramic nanocomposite powder, in particular to a kind of SnO 2 / Ag nanocomposite powder preparation method. Background technique [0002] Metal / ceramic composite powders are widely used in high-strength, wear-resistant, lightweight metal components; metal-ceramic composite materials for electronic packaging; ceramic knives; electrical contact materials and conductive paste; Components and surface coatings are in progress. Its application fields cover aerospace, electronic information, medical diagnosis, chemical industry, automobile and other industries. Among them, ceramic particles such as oxides, carbides, nitrides, etc. have excellent properties such as high strength, hardness, corrosion resistance, and wear resistance, and play an important role in improving the performance of metal materials. Especially when the particle size of the composite powder is reduce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02B82Y30/00B22F1/00B22F9/24
CPCB22F9/24B22F1/054Y02P20/10
Inventor 乔秀清李东升候东芳赵君吴亚盘董文文
Owner CHINA THREE GORGES UNIV
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