Method for preparing spherical nanometer zirconium silicate powder

A technology of zirconium silicate and nano-zirconia, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of many processing procedures, low bonding strength, and affecting performance, and achieve a smooth and dense surface. Simple, growth-slowing effect

Active Publication Date: 2015-11-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the powder preparation process, the original nano-powder of zirconium silicate generally needs to go through processes such as calcination, spray granulation and high-temperature sintering. After the above-mentioned processes, most of the original nano-powder grains often grow into microns Grains, so that the final powder is micron-scale, such as under the action of sintering, a plurality of small nano-powder particles will stick together to form a micro-s

Method used

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  • Method for preparing spherical nanometer zirconium silicate powder
  • Method for preparing spherical nanometer zirconium silicate powder
  • Method for preparing spherical nanometer zirconium silicate powder

Examples

Experimental program
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Effect test

Embodiment 1

[0047] A preparation method of spherical nano zirconium silicate powder, the method steps are as follows:

[0048] (1) Mix 738g of nano-zirconia powder and 360g of nano-silicon oxide powder evenly to obtain mixed powder a; add mixed powder a, 1548.18g of deionized water and 109.8g of polyvinyl alcohol solution with a mass fraction of 10wt% into the vertical ball mill In, mix uniformly, obtain the slurry 1 that solid content is 40wt%;

[0049] Wherein, the nano-zirconia powder and the nano-silicon oxide powder have a particle size of 10-100 nm;

[0050] Described mixing adopts vertical ball mill, and ball milling parameter is as follows:

[0051] The ball-to-material ratio is 4:1; the rotational speed is 300rpm; the ball milling media are zirconia balls with a particle size of 10mm and 5mm respectively, and the mass ratio of the zirconia balls with a particle size of 10mm to the zirconia balls with a particle size of 10mm is 1:1 ;

[0052] (2) Add slurry 1 to the spray dryin...

Embodiment 2

[0059] A preparation method of spherical nano zirconium silicate powder, the method steps are as follows:

[0060] (1) Mix 738g of nano-zirconia powder and 360g of nano-silicon oxide powder evenly to obtain mixed powder a; add mixed powder a, 1048.59g of deionized water and 54.9g of polyvinyl alcohol solution with a mass fraction of 10wt% into the vertical ball mill In, mix evenly, obtain the slurry 1 that solid content is 50wt%;

[0061] Wherein, the nano-zirconia powder and the nano-silicon oxide powder have a particle size of 10-100 nm;

[0062] Described mixing adopts vertical ball mill, and ball milling parameter is as follows:

[0063] The ball-to-material ratio is 3:1; the rotational speed is 250rpm; the ball milling media are zirconia balls with particle diameters of 10mm and 5mm respectively, and the mass ratio of the zirconia balls with a particle size of 10mm to the zirconia balls with a particle size of 10mm is 1:1 ;

[0064] (2) Add the slurry 1 to the spray dr...

Embodiment 3

[0070] A preparation method of spherical nano zirconium silicate powder, the method steps are as follows:

[0071] (1) Mix 738g nano-zirconia powder and 360g nano-silicon oxide powder evenly to obtain mixed powder a; add mixed powder a, 543.36g deionized water and 10wt% polyvinyl alcohol solution 219.6g into vertical ball mill In, mix evenly, obtain the slurry 1 that solid content is 60wt%;

[0072] Wherein, the nano-zirconia powder and the nano-silicon oxide powder have a particle size of 10-100 nm;

[0073] Described mixing adopts vertical ball mill, and ball milling parameter is as follows:

[0074] The ball-to-material ratio is 2:1; the rotational speed is 350rpm; the ball milling media are zirconia balls with a particle size of 10mm and 5mm respectively, and the mass ratio of the zirconia balls with a particle size of 10mm to zirconia balls with a particle size of 10mm is 1:1 ;

[0075] (2) Add slurry 1 to the spray drying tower, set the inlet temperature of the spray ...

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Abstract

The invention discloses a method for preparing spherical nanometer zirconium silicate powder and belongs to the technical field of inorganic materials. The method comprises the steps of mixing nanometer zirconium oxide powder and nanometer silicon oxide powder uniformly according to the mole ratio of 1:1, and obtaining a powder mixture (a); adding deionized water and binder into the powder mixture (a), conducting mixing uniformly, and obtaining slurry (1); adopting spray-drying equipment for conducting powder agglomeration treatment on the slurry (1), and obtaining agglomerated composite powder; utilizing induction plasma spheroidizing equipment for conducting spheroidizing and compaction treatment on the composite powder, and obtaining the zirconium silicate spherical nanometer agglomerated powder, wherein according to the method, by adjusting relevant process parameters, solid spherical nanometer powder with the surfaces compact, bright and clean can be obtained, and the powder can be distributed within a certain particle size range. The powder has excellent flowing property, the high temperature phase structure is stable, the chemical stability is good, and the powder has god application prospect in the field of thermal barrier coating materials.

Description

technical field [0001] The invention relates to a preparation method of spherical nano zirconium silicate powder, which belongs to the technical field of inorganic materials. Background technique [0002] With the development of aviation and aerospace technology, the operating temperature and pressure requirements of aircraft engine hot-end components and airframes continue to increase. Correspondingly, there are higher requirements for the high temperature resistance and oxidation resistance of the materials used in the hot end parts of the aircraft engine and the airframe. Zirconium silicate (ZrSiO 4 ) is a silicate compound with a tetragonal island structure. Compared with YSZ (yttria-stabilized zirconia), it has a higher refractive index, more excellent high-temperature phase structure stability, and better Based on the advantages of chemical stability (such as acid and alkali corrosion resistance), excellent thermal shock resistance and oxidation resistance, zirconium...

Claims

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Application Information

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IPC IPC(8): C01B33/20B82Y30/00
Inventor 柳彦博马壮王皓栾兴涛
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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