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A kind of preparation method of high-purity neodymium stannate nanopowder

A technology of nano-powder and neodymium stannate, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc. It can solve the problems of miscellaneous products, large product size and relatively high requirements, and reduce the sintering temperature and reaction temperature. The effect of low cost and simple process

Active Publication Date: 2017-03-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional high-temperature solid-phase synthesis method not only wastes resources, the product is prone to miscellaneous items, and the product size is large
Preparation of Nd by hydrothermal method 2 sn 2 o 7 For powder, the requirements for high-pressure reactor equipment are relatively high, and the synthesis yield is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Preparation of precursor solution A

[0019] Solute is citric acid and ethylenediaminetetraacetic acid (EDTA) that molar ratio is 1.5: 1, and solvent is to add a certain amount of ammoniacal liquor (wherein, the consumption of ammoniacal liquor is based on NH 3 Calculation of molar mass, NH 3 The molar ratio between ethylenediaminetetraacetic acid and ethylenediaminetetraacetic acid is 0.5:1;) deionized water mixture; add a certain amount of solute to the solvent, stir it with magnetic force until it is completely dissolved, and then pipette it into a volumetric flask with a glass rod Constant volume was prepared into a colorless and transparent solution with a concentration of 0.03 mol / L, which was recorded as precursor solution A.

[0020] (2) Preparation of precursor solution B

[0021] The solute is neodymium nitrate and tin tetrachloride pentahydrate with a molar ratio of 1:1, and the solvent is deionized water; the solute is introduced into deionized water, ...

Embodiment 2

[0025] (1) Preparation of precursor solution A

[0026] Solute is citric acid and ethylenediaminetetraacetic acid (EDTA) that molar ratio is 1.5: 1, and solvent is to add a certain amount of ammoniacal liquor (wherein, the consumption of ammoniacal liquor is based on NH 3 Calculation of molar mass, NH 3 The molar ratio between ethylenediaminetetraacetic acid and ethylenediaminetetraacetic acid is 0.5:1;) deionized water mixture; add a certain amount of solute to the solvent, stir it with magnetic force until it is completely dissolved, and then pipette it into a volumetric flask with a glass rod Constant volume was prepared into a colorless and transparent solution with a concentration of 0.1 mol / L, which was recorded as precursor solution A.

[0027] (2) Preparation of precursor solution B

[0028] The solute is neodymium nitrate and tin tetrachloride pentahydrate with a molar ratio of 1:1, and the solvent is deionized water; the solute is introduced into deionized water, s...

Embodiment 3

[0032] (1) Preparation of precursor solution A

[0033] Solute is citric acid and ethylenediaminetetraacetic acid (EDTA) that molar ratio is 1.5: 1, and solvent is to add a certain amount of ammoniacal liquor (wherein, the consumption of ammoniacal liquor is based on NH 3 Calculation of molar mass, NH 3 The molar ratio between ethylenediaminetetraacetic acid and ethylenediaminetetraacetic acid is 0.5:1;) Deionized water mixture of ammonia water; add a certain amount of solute to the solvent, stir with magnetic force until completely dissolved, and then use a glass rod to pipette to volume Keep the volume in the bottle, prepare a colorless and transparent solution with a concentration of 0.6 mol / L, and record it as precursor solution A.

[0034] (2) Preparation of precursor solution B

[0035] The solute is neodymium nitrate and tin tetrachloride pentahydrate with a molar ratio of 1:1, and the solvent is deionized water; the solute is introduced into deionized water, stirred ...

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PUM

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Abstract

The invention relates to preparing of nanometer powder, and aims at providing a method for preparing high-purity neodymium-stannate nanometer powder. The method includes the specific steps that citric acid and ethylenediamine tetraacetic acid are added into deionized water mixing liquid of ammonia water, the mixture is stirred, dissolved and subjected to volume fixing, and a first polymeric pecursor solution is obtained; neodymium nitrate and stannic chloride pentahydrate are added into deionized water, the mixture is stirred, dissolved and subjected to volume fixing, and a second polymeric pecursor solution is obtained; the second polymeric pecursor solution is dropwise added into the first polymeric pecursor solution, and then the pH value is adjusted with an ammonia water solution to form sol; the sol is aged to form wet gel, and after the wet gel is dried, ground, screened and sintered, the neodymium-stannate nanometer powder is obtained. The method is low in reaction temperature, simple in technology, low in cost, high in yield and controllable in morphology and structure. The sintering temperature of the prepared Nd2Sn2O7 phase ranges from 850 DEG C to 1,000 DEG C, the sintering time is shortened to 3-6 h, the high sintering temperature in a traditional preparing method is reduced, and energy consumption is saved.

Description

technical field [0001] The invention relates to the preparation of nanopowder, in particular to a high-purity neodymium stannate (Nd 2 sn 2 o 7 ) The preparation method of nanopowder. Background technique [0002] Nd 2 sn 2 o 7 Rare earth neodymium stannate compound belonging to pyrochlore structure, the structure form is composite oxide A 2 B 2 o 7 Type (A and B are metal). It includes a variety of compounds with different structures, and has excellent physical properties such as optoelectronics and electromagnetics. Therefore, it has become the most dynamic research object in the field of nanomaterials, which has a very important impact on future economic and social development, and is also an important part of nanotechnology that is most active and closest to application. [0003] The current preparation of neodymium stannate (Nd 2 sn 2 o 7 ) The main techniques are solid phase method, hydrothermal method, chemical co-precipitation method and sol-gel method. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G19/00B82Y30/00
CPCC01G19/00C01P2004/64C01P2006/80
Inventor 张玲洁沈涛杨辉张继樊先平申乾宏
Owner ZHEJIANG UNIV
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