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Precursor solution and high temperature atomized flame synthesis of yttrium aluminum composite oxide nanopowder and its preparation method

A composite oxide and nano-powder technology, which is applied in the field of high-temperature atomization flame synthesis of yttrium-aluminum composite oxide nano-powder and its preparation, can solve the problem that it is difficult to obtain nano-sized spherical particles of uniform size, the powder particle has a wide particle size distribution, The problem of uneven powder particles, etc., achieves the effect of simple raw materials and equipment, fast synthesis speed, and uniform particle size

Active Publication Date: 2021-06-22
TSINGHUA UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The article published by Zhang Chengan et al. "Preparation of nanocrystalline magnesium aluminum spinel powder by flame spray pyrolysis", "Refractory Materials", 2007, 41 (5): 369-372 uses inorganic nitrate as a precursor, and the precursor liquid solvent is Although the mixed solution of ethanol and distilled water reduces the cost, the particle size distribution of the synthesized powder is very wide
The above studies only prepared related materials through the preliminary flame spray pyrolysis method. The powder obtained by YAG synthesis has the problems of uneven particles and difficult size control, and it is difficult to obtain nano-scale spherical particles with uniform size.

Method used

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  • Precursor solution and high temperature atomized flame synthesis of yttrium aluminum composite oxide nanopowder and its preparation method
  • Precursor solution and high temperature atomized flame synthesis of yttrium aluminum composite oxide nanopowder and its preparation method
  • Precursor solution and high temperature atomized flame synthesis of yttrium aluminum composite oxide nanopowder and its preparation method

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preparation example Construction

[0040] see figure 1 , the embodiment of the present invention provides a high-temperature atomization flame synthesis of yttrium-aluminum composite oxide nanopowder preparation method, comprising:

[0041] S1, atomize the precursor liquid to form droplets, the precursor liquid includes Y 3+ and Al 3+ inorganic salts, additives and organic solvents; and

[0042] S2, passing the droplet into a flame to react to generate yttrium-aluminum composite oxide nanopowder.

[0043] The additive is used with the Y 3+ and Al 3+ The inorganic salt is generated in the droplet formed by the precursor solution under the action of the flame, and the volatilization temperature is lower than the Y 3+ and Al 3+ substances of inorganic salts, thereby increasing the Y 3+ and Al 3+ The volatility of the inorganic salts in the flame.

[0044] see figure 2 , Different types of precursors determine the synthesis and growth paths of subsequent nanoparticles. The synthesis and growth of nanopar...

Embodiment 1

[0056] Yttrium nitrate hexahydrate (Y(NO 3 ) 3 ·6H 2 O) and aluminum nitrate nonahydrate (Al(NO 3 ) 3 9H 2 O) is a precursor, dissolved in pure ethanol, the additive is 2-ethylhexanoic acid, and the mass fraction in the precursor solution is 50%. Prepare the solution according to the stoichiometric ratio, Y in the precursor solution 3+ :Al 3+ =3:5, Y in the precursor solution 3+ and Al 3+ The total concentration is 0.4mol / L. After the precursor liquid is atomized, it enters the burner flame to obtain YAG spherical nanoparticle powder.

Embodiment 2

[0058] Example 2 is the same as Example 1, except that the mass fraction of the additive 2-ethylhexanoic acid in the precursor solution is 18%.

[0059] see image 3 and Figure 4, it can be seen that due to the synthesis path of the atomized precursor liquid in the flame is controlled in the "gas phase-particles", the particles in the nanopowders obtained in Examples 1 and 2 have good sphericity and narrow particle size distribution.

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Abstract

The invention provides a method for preparing nano-powder of yttrium-aluminum composite oxide by high-temperature atomization flame synthesis, comprising: atomizing a precursor solution to form droplets, the precursor solution comprising Y 3+ and Al 3+ Inorganic salts, additives, and organic solvents; and reacting the droplets into flames to generate yttrium-aluminum composite oxide nanopowders, wherein the additives are used to combine with the Y 3+ and Al 3+ The inorganic salt is generated in the droplet formed by the precursor solution under the action of the flame, and the volatilization temperature is lower than the Y 3+ and Al 3+ substances of inorganic salts, thereby increasing the Y 3+ and Al 3+ The volatility of the inorganic salts in the flame. The invention also provides a high-temperature atomized flame synthesis yttrium-aluminum composite oxide nanopowder and a precursor liquid.

Description

technical field [0001] The invention belongs to the field of nano-powder synthesis of structural and functional ceramic materials, and in particular relates to a precursor liquid, a high-temperature atomized flame prepared by using the precursor liquid to synthesize yttrium-aluminum composite oxide nano-powder and a preparation method. Background technique [0002] Yttrium aluminum garnet (Y 3 Al 5 o 12 , YAG) belongs to the cubic crystal system and has stable physical and chemical properties. These characteristics make YAG widely used in the fields of structural and functional materials, such as preparing YAG fluorescent materials into transparent ceramics as LED backlight and packaging materials; YAG down conversion Luminescent materials can effectively improve the photoelectric conversion efficiency of solar cells; polycrystalline YAG is expected to replace single crystal materials as a new generation of laser materials. In addition, the transparency of YAG in the 0.2 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/505C04B35/626
CPCC04B35/505C04B35/62665C04B2235/442C04B2235/443C04B2235/444C04B2235/445
Inventor 李水清田辉卫吉丽任翊华卓建坤
Owner TSINGHUA UNIV
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