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Y2O3 nano powder and preparation method thereof

A nano-powder, micron-scale technology, applied in nanotechnology, chemical instruments and methods, rare earth metal compounds, etc., can solve the problems of harsh reaction conditions, poor chemical uniformity, wide particle size distribution, etc., and achieve a simple preparation method. Easy to implement, good industrial application prospects, and the effect of narrow particle size distribution

Inactive Publication Date: 2018-08-28
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a Y 2 o 3 The nano powder and its preparation method can solve the problem of Y obtained by the existing preparation method 2 o 3 The technical problems of low purity, poor chemical uniformity, large particles, wide particle size distribution, and low chemical activity of nanopowders, as well as the existing preparation methods themselves include: harsh reaction conditions (high temperature, high pressure, etc.), difficult Large-scale production, easy agglomeration in the preparation process, low efficiency and other technical problems

Method used

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  • Y2O3 nano powder and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] 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 0.25mol / 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 a stoichiometric ratio of 2:3; while stirring, add 9g of citric acid and 0.806g of ethylene glycol to the above Y (NO 3 ) 3 After stirring until completely transparent, add ammonia (mass fraction 25%) to adjust the pH to 3 to obtain the mother liquor, and bathe in 80°C water for 2.5h to obtain a light yellow viscous precursor sol; dry the precursor sol at 180°C for 2h, Calcined at 600°C for 1 hour to obtain Y 2 o 3 Nano powder. The X-ray diffraction pattern of the nanometer yttrium oxide gained in the present embodiment 1 is as follows figure 1 as shown,figure 1 It shows that the precursor is calcined at 600°C for 1 hour to obtain a pure crystalline phase of nan...

Embodiment 2

[0031] 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 0.25mol / 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 a stoichiometric ratio of 2:3; while stirring, add 12g of citric acid and 0.906g of glycerol to the above Y (NO 3 ) 3 After stirring until completely transparent, ammonia water (25% by mass) was added to adjust the pH to 3 to obtain a mother liquor, and a light yellow viscous precursor sol was obtained in a 90°C water bath for 2 hours; the precursor sol was dried at 180°C for 2h, and 800°C ℃ calcined for 0.5h to obtain Y 2 o 3 Nano powder. Using a laser particle size analyzer, the average particle size of the yttrium oxide nanopowder obtained in Example 2 is about 45 nm.

Embodiment 3

[0033] 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 0.2mol / 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 a stoichiometric ratio of 2:3; while stirring, add 7.2g of citric acid and 0.580g of PEG 400 to the above Y(NO 3 ) 3 After stirring until completely transparent, add ammonia (mass fraction 25%) to adjust the pH to 2.5 to obtain a mother solution, and bathe in 80°C for 2.5h to obtain a light yellow viscous precursor sol; dry the precursor sol at 240°C for 1.5h , calcined at 600°C for 1 h to obtain Y 2 o 3 Nano powder. Using a laser particle size analyzer, the average particle size of the yttrium oxide nanopowder obtained in Example 3 is about 48 nm.

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Abstract

The invention provides a Y2O3 nano powder and a preparation method thereof. The preparation method comprises the following steps: preparing a Y(NO3)3 clarified solution, wherein the concentration of the clarified solution is 0.15 to 0.3 mol / L; weighing citric acid and a dispersant, adding the citric acid and the dispersant into the Y(NO3)3 clarified solution in sequence, and controlling the concentration of the citric acid in the mixed solution to be 0.1 to 0.9 mol / L; adjusting the pH value of the mixed solution to 2.5 to 4, and then heating the acidic mixed solution in a water bath to obtainprecursor sol; drying and calcining the precursor sol, so as to obtain the Y2O3 nano powder. According to the Y2O3 nano powder and the preparation method thereof, the technical problems that the Y2O3nano powder prepared by the existing preparation method is low in purity, low in chemical uniformity, large in particle size, wide in particle size distribution and low in chemical activity and the problems of harsh required reaction conditions (high temperature, high pressure and the like), difficulty in large-scale production, easy aggregation in a preparation process, low efficiency and the like of the existing preparation method can be solved.

Description

technical field [0001] The invention belongs to the technical field of rare earth nano-powder preparation, and specifically 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y40/00
CPCC01P2002/72C01P2004/64C01P2006/80C01F17/206
Inventor 董衡孙志强肖振兴李淑琴王华栋吕毅
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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