a y 2 o 3 Nanopowder and its preparation method

A nano-powder, micron-scale technology, applied in the direction of nanotechnology, chemical instruments and methods, rare earth metal oxides/hydroxides, etc., can solve the problem of high activity of yttrium ion phase grains, inability to be affected by aluminum ions, and easy aggregation. Large and other problems, achieve good industrial application prospects, overcome the difficulty of concentration gradient, and reduce the effect of reaction time

Active Publication Date: 2019-11-22
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the single-phase yttrium ion phase grains cannot be inhibited by aluminum ions or other particle phase grains due to their high activity, large specific surface area, and easy aggregation and growth, and the prepared nanopowders are mostly sheet-like.

Method used

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  • a y <sub>2</sub> o <sub>3</sub> Nanopowder and its preparation method
  • a y <sub>2</sub> o <sub>3</sub> Nanopowder and its preparation method
  • a y <sub>2</sub> o <sub>3</sub> Nanopowder and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A certain mass of micron-scale (4N)Y 2 o 3 The powder (purity 99.99%) is heated and completely dissolved in excess nitric acid (mass fraction is 65%), diluted with water to form 0.01mol / L Y(NO 3 ) 3 clear solution, and micron (4N)Y 2 o 3 The ratio of dissolving with nitric acid (mass fraction is 65%) is the stoichiometric ratio of 2:3; while stirring, 15g of hexamethylenetetramine, a certain amount of (NH 4 ) 2 SO 4 Static stabilizer added above Y (NO 3 ) 3 and the added dispersant dose is the theoretical nanometer Y 2 o 31% of mass. , stirred until the solution was completely transparent, placed in a microwave oven with a frequency of 2.45 GHz and an output power of 1100 W and a model BS1200 for 1.5 h of microwave irradiation, and then quenched the precursor synthesized by microwave in an ice-water mixture for 0.5 h, followed by Wash with deionized water and absolute ethanol for 3 times and centrifuge to obtain the precursor precipitate, dry it at 80°C for 2...

Embodiment 2

[0038] A certain mass of micron-scale (4N)Y 2 o 3 The powder (purity 99.99%) is heated and completely dissolved in excess nitric acid (mass fraction is 65%), diluted with water to form 0.02mol / L Y(NO 3 ) 3 clear solution of micron (4N)Y 2 o 3 The ratio of dissolving with nitric acid (mass fraction is 65%) is the stoichiometric ratio of 2:3; while stirring, 60g of hexamethylenetetramine, a certain amount of (NH 4 ) 2 SO 4 Static stabilizer and PVP are added to the above Y(NO 3 ) 3 In the clear solution of , and the added dispersant dose is the theoretical nanometer Y 2 o 3 3% of mass. , stirred until the solution was completely transparent, placed in a microwave oven with a frequency of 2.45GHz and an output power of 1100W and a model BS1200 for 1.6h of microwave irradiation, and then quenched the precursor synthesized by microwave in an ice-water mixture for 0.7h, and then used Wash with deionized water and absolute ethanol for 3 times and centrifuge to obtain the p...

Embodiment 3

[0040] A certain mass of micron-scale (4N)Y 2 o 3 The powder (purity 99.99%) is heated and completely dissolved in excess nitric acid (65% by mass fraction), diluted with water to form 0.03mol / L Y(NO 3 ) 3 clear solution of micron (4N)Y 2 o 3 The ratio of dissolving with nitric acid (mass fraction is 65%) is the stoichiometric ratio of 3:4; while stirring, 75g of hexamethylenetetramine, a certain amount of (NH 4 ) 2 SO 4 Static stabilizer and PEG40000 added above Y(NO 3 ) 3 In the clear solution of , and the added dispersant dose is the theoretical nanometer Y 2 o 3 5% of the mass. , adding the above Y(NO 3 ) 3 After stirring until the solution is completely transparent, put it in a microwave oven with a frequency of 2.45 GHz and an output power of 1100 W and a model BS1200 for 1.6 h of microwave irradiation, and then quench the precursor synthesized by microwave in an ice-water mixture for 1 h , washed with deionized water and absolute ethanol three times and cen...

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Abstract

The invention provides Y2O3 nano powder and a preparation method thereof. Y(NO3)3 is used as a yttrium source, hexamethylene tetramine is used as a precipitator, a static stabilizer and a surfactant are used as dispersing agents, and by technological processes such as adjustment on the concentration ratio of a solution to reactants, adjustment on microwave irradiation time, adjustment on quenchingtime of an ice-water mixture and adjustment on calcination temperature and time, the spherical nano Y2O3 powder which is small in grain diameter, good in dispersibility and high in activity, and is distributed uniformly is prepared. By the method, the reaction time is shortened, and the efficiency of samples is improved; moreover, the preparation method is uniform in heating and simple to operate; difficulty on concentraotn gradient of the mixed solution can further be overcome; and the industrial application prospect is good.

Description

technical field [0001] The invention belongs to the technical field of rare earth nano powder preparation and relates to a Y 2 o 3 Nanopowder and its preparation method. Background technique [0002] Transparent ceramics have the inherent high temperature resistance, corrosion resistance, high insulation, high strength and other characteristics of ceramics, as well as the optical properties of glass. At present, many research and production units are committed to the research and development of new transparent ceramics. Yttria Y 2 o 3 As an excellent high-temperature infrared material and electronic material, it has the characteristics of good transparency, heat resistance and corrosion resistance, high temperature stability and high dielectric constant, and the transparent ceramics prepared by it are in a wide frequency range, especially in the infrared area, with high light transmittance, widely used. [0003] Currently Y 2 o 3 Transparent ceramics are usually prepa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/00B82Y40/00
CPCC01F17/206C01P2002/72C01P2004/03C01P2004/32C01P2004/62C01P2004/64
Inventor 董衡王华栋李淑琴吕毅王涛肖振兴
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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