Method for preparing nanometer compound powder and product

A technology of nano-compounds and powders, which is applied in the direction of titanium compounds, phosphorus compounds, chemical instruments and methods, etc., which can solve the problems of difficult control of the process of nano-powders, uneven size distribution, large grain size of products, etc., and achieve the purpose of inhibiting coalescence and growth, elimination of local concentration and temperature unevenness, stable combustion temperature and combustion rate

Inactive Publication Date: 2015-09-30
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0007] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method and product for preparing nano-compound powder, which applies ultrasonic field to solution combustion synthesis technology to form nano-compound under the combination of ultrasonic field and temperature field. The powder method solves the technical problems of difficult control of the preparation process of nano-powder in the existing solution combustion synthesis technology, difficulty in synthesizing multi-component compounds, large grain size of the prepared product, and uneven size distribution

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  • Method for preparing nanometer compound powder and product
  • Method for preparing nanometer compound powder and product
  • Method for preparing nanometer compound powder and product

Examples

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Embodiment 1

[0041] This example is used to synthesize Na 3 V 2 (PO 4 ) 3 Nano powder:

[0042] S1: Prepare the mixed solution of raw materials, specifically, first mix 3.13g of C 6 h 8 o 7 , 2.34g of NH 4 VO 3 , 2.55g of NaNO 3 and 3.45 g of NH 4 h 2 PO 4 respectively dissolved in appropriate amount of deionized water, C 6 h 8 o 7 、NaNO 3 and NH 4 h 2 PO 4are completely soluble in deionized water corresponding to three clear and transparent solutions, while NH 4 VO 3 Slightly soluble in deionized water to obtain a white suspension. Then white NH 4 VO 3 The suspension was added dropwise to C 6 h 8 o 7 solution, followed by NaNO 3 solution and NH 4 h 2 PO 4 The solution was added to the above solution to obtain 200 ml of a mixed solution. The resulting 200ml mixed solution was stirred in a 60°C water bath for 2h to obtain a dark blue clear raw material mixed solution.

[0043] S2: placing the mixed raw material solution at a temperature of 200° C. to 700° C., ...

Embodiment 2

[0049] This embodiment is used to synthesize Li 2 TiO 3 -Li 2 SiO 3 Composite nanopowder.

[0050] S1: prepare the mixed solution of raw materials, specifically, at first: respectively mix 4.38g of C 6 h 8 o 7 and 6.90 g of LiNO 3 were dissolved in appropriate amount of deionized water to obtain clear solutions respectively, and then LiNO 3 solution was added to C 6 h 8 o 7 In the solution, the above solution was stirred and mixed, and then 5.21g of tetraethyl orthosilicate was dropped into the solution containing LiNO 3 and C 6 h 8 o 7 The mixed solution was stirred in a water bath at 60° C. for 2 h to obtain a lithium orthosilicate precursor solution. In addition, 8.50 g of tetrabutyl titanate was added to an appropriate amount of water for hydrolysis to form a white precipitate. The precipitate was centrifuged and washed, and then 30 mL of distilled water and about 20 mL of concentrated nitric acid were added to the precipitate in order to dissolve the precipi...

Embodiment 3

[0056] This embodiment is used to synthesize Li 2 TiO 3 Nano powder.

[0057] S1: Prepare a mixed solution of raw materials. Specifically, first, add 6.81 g of tetrabutyl titanate to an appropriate amount of water for hydrolysis to form a white precipitate, centrifuge and wash the precipitate, and then add 30 mL of distilled water and 15 mL of Concentrated nitric acid to dissolve the precipitate to obtain a transparent titanium salt solution. 2.76g of LiNO 3 and 3.54g of C 6 h 8 o 7 Dissolve in appropriate amount of deionized water respectively to obtain a clear solution. Titanium salt solution and LiNO 3 solution was added to C 6 h 8 o 7 solution, 50 mL of a clear mixed solution of raw materials was obtained.

[0058] S2: Move the mixed solution into a crucible and place it in a muffle furnace at 500°C. At the same time, apply ultrasonic treatment to the mixed solution. The ultrasonic frequency is 20kHZ, the ultrasonic power is 2kW, the ratio of ultrasonic pulse ti...

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Abstract

The invention discloses a method for preparing nanometer compound powder and a product thereof, and belongs to the field of nanometer powder preparation. The method comprises the steps that 1, a raw material mixture solution is prepared; 2, the raw material mixture solution is placed at the temperature ranging from 200 DEG C to 700 DEG C, an ultrasonic field is applied on the raw material mixture solution simultaneously until combustion reaction occurs in the raw material mixture solution, and then the reaction product is obtained; 3, after the combustion reaction is finished, the reaction product is naturally cooled. According to the method for preparing the nanometer compound powder, the ultrasonic field is introduced to solution combustion synthesis, the reaction which is difficult to achieve through a traditional solution combustion method can be promoted to be performed smoothly, the synthetic product is even in particle size and small in size, and agglomeration can not occur.

Description

technical field [0001] The invention relates to a method for preparing nanometer powder, in particular to a method and product for preparing nanometer compound powder under the combined action of an ultrasonic field and a temperature field. Background technique [0002] Nano-compounds have excellent physical, chemical and optical properties, and have broad application prospects in the fields of electronics, energy, biology, and the environment, and occupy an important position in the field of contemporary material science. Throughout the research and development of nanomaterials, the preparation of nanomaterials restricts the popularization and application of nanomaterials, because the preparation process and process control have an important impact on the microstructure and macroscopic properties of materials. [0003] At present, conventional techniques for preparing nano-compounds include: co-precipitation method, sol-gel method, microemulsion method, hydrothermal / solvoth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/45C01B33/32C01G23/00B82Y40/00
Inventor 薛丽红严有为张五星
Owner HUAZHONG UNIV OF SCI & TECH
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