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A kind of method that sodium molybdate organically prepares nano molybdenum powder

A technology of nano-molybdenum powder and sodium molybdate, which is applied in the field of organically preparing nano-molybdenum powder by sodium molybdate, can solve the problems of uneven particle size distribution and difficult industrialized production, and achieves simple and easy operation of equipment, thorough nanometerization and reaction. low temperature effect

Active Publication Date: 2018-07-31
湖南省华京粉体材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Uneven particle size distribution, difficult to industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A sodium molybdate organic

[0030] Weigh sodium molybdate, sulfuric acid and salicylic acid, use distilled water as the reaction solvent, and react at 95°C for 5 hours to obtain molybdenum salicylate. Among them, the molar ratio of sodium molybdate, sulfuric acid and salicylic acid is 1:0.9:0.8, and 5 L of a solution of 1 mol / L molybdate ion is configured.

[0031] B molybdenum salicylate purification

[0032] The molybdenum salicylate obtained by the reaction was washed with water to remove impurities, and the water was distilled off to obtain 2018g of pure molybdenum salicylate.

[0033] C thermal decomposition reaction

[0034] The purified molybdenum salicylate was sent to a tube furnace by pushing a boat, and the argon gas was used as an inert gas, and the temperature was raised to 240° C. and kept for 4 hours. The obtained molybdenum dioxide powder has a particle size of 30nm, and the obtained organic matter is reused.

[0035] D reduction

[0036] Then the ...

Embodiment 2

[0039] A sodium molybdate organic

[0040] Weigh sodium molybdate, sulfuric acid and salicylic acid, use distilled water as the reaction solvent, and react at 100°C for 6 hours to obtain molybdenum salicylate. Among them, the molar ratio of sodium molybdate, sulfuric acid and salicylic acid is 1:1:1, and 5L of a solution of 1 mol / L of molybdate ion is configured.

[0041] B molybdenum salicylate purification

[0042] The molybdenum salicylate obtained by the reaction was washed with water to remove impurities, and the water was distilled off to obtain 2016g of pure molybdenum salicylate.

[0043] C thermal decomposition reaction

[0044] The purified molybdenum salicylate was sent to a tube furnace by pushing a boat, and argon was used as an inert gas, and the temperature was raised to 300° C., and kept for 6 hours. The obtained molybdenum dioxide powder has a particle size of 10 nm, and the obtained organic matter is reused.

[0045] D reduction

[0046] Then the tempera...

Embodiment 3

[0049] A sodium molybdate organic

[0050] Weigh sodium molybdate, sulfuric acid and salicylic acid, use distilled water as the reaction solvent, and react at 110°C for 8 hours to obtain molybdenum salicylate. Among them, the molar ratio of sodium molybdate, sulfuric acid and salicylic acid is 1:1:1, and 5L of a solution of 2 mol / L of molybdate ion is configured.

[0051] B molybdenum salicylate purification

[0052] The molybdenum salicylate obtained by the reaction was washed with water to remove impurities, and the water was distilled off to obtain 4037g of pure molybdenum salicylate.

[0053] C thermal decomposition reaction

[0054] The purified molybdenum salicylate was sent to a tube furnace by pushing a boat, and the argon gas was used as an inert gas, and the temperature was raised to 320°C and kept for 6 hours. The particle size of the obtained molybdenum dioxide powder is 8nm, and the obtained organic matter is reused.

[0055] D reduction

[0056] Then the tem...

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Abstract

The invention relates to a preparing method of nanometer molybdenum powder. Sodium molybdate and salicylic acid react to generate liquid salicylic acid molybdenum, nanometer molybdenum oxide is obtained through dissolving of a tube type furnace, hydrogen reduction is then carried out through a box type furnace, the high-purity nanometer molybdenum powder is obtained, the sodium molybdate, sulfuric acid and the salicylic acid are weighed, distilled water serves as a reaction solvent, a reaction is made for 5 h to 8 h at the temperature ranging from 95 DEG C to 110 DEG C, the salicylic acid molybdenum is obtained, the mole ratio of the sodium molybdate to the sulfuric acid to the salicylic acid is 1:(0.9-1.1):(0.8-1.2), and the molar concentration of molybdate anions in a prepared aqueous solution is 1 mol / L to 2 mol / L; and the salicylic acid molybdenum is purified to be subject to thermal decomposition, and finally reduction is carried out. According to the nanometer molybdenum powder prepared through the method, the grain size is 10 nm to 40 nm, the purity is 99.999%, the yield reaches 98%, the molybdenum powder is even in granularity and is completely nanoscale powder, and the molybdenum powder is suitable for industrial production.

Description

technical field [0001] The invention relates to a method for organically preparing nanomolybdenum powder by sodium molybdate. It obtains molybdenum salicylate through the reaction of sodium molybdate and salicylic acid, through thermal decomposition, using liquid organic molybdenum and thermal decomposition to produce good dispersion of gaseous substances, to obtain high-purity nano molybdenum oxide, and then through hydrogen reduction, to obtain Nano-molybdenum powder is mainly used in nano-molybdenum wire, electrical contacts, alloy mixtures, electronic substrates, thick film inks, metal injection molding and thermal spraying powders, etc. Background technique [0002] Molybdenum and molybdenum alloys have the advantages of high melting point, high strength, high hardness, high wear resistance, high thermal conductivity, low expansion coefficient, high elastic modulus, good corrosion resistance, good elongation, etc., and are widely used in iron and steel metallurgy , pet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/22B22F9/30
CPCB22F9/22B22F9/30
Inventor 李焌源薛海涛李春芳罗小媚吴尔京戴长欣
Owner 湖南省华京粉体材料有限公司
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