Preparation method of small-sized ultra-dispersed nano zirconium oxide-based coating powder

A zirconia-based, coating powder technology, applied in zirconia, nanotechnology and other directions, to achieve the effect of high repeatability, low process cost, preventing growth and agglomeration

Active Publication Date: 2017-12-08
HUANENG POWER INT INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the outstanding problems in the preparation process of traditional zirconia-based coatings and powder raw materials, and to provide a small-sized, ultra-dispersed nano-zirconia-based coating powder without using any surfactant new method of preparation

Method used

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  • Preparation method of small-sized ultra-dispersed nano zirconium oxide-based coating powder
  • Preparation method of small-sized ultra-dispersed nano zirconium oxide-based coating powder
  • Preparation method of small-sized ultra-dispersed nano zirconium oxide-based coating powder

Examples

Experimental program
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Effect test

Embodiment 1

[0039] First, anhydrous zirconium chloride (23.32g) was dissolved in absolute ethanol (500ml) to form a zirconium chloride ethanol solution, then caustic soda (16g) was added to the zirconium chloride ethanol solution, fully Mix for 30 minutes, then use a separator to remove the remaining ethanol solution, and after drying at 60°C, introduce the hydroxide precipitation mixture into a crucible, and calcinate at 600°C for 2 hours. Finally, the small-sized, ultra-dispersed nano-zirconia (ZrO 2 ) coating powder.

Embodiment 2

[0041] First, anhydrous zirconium chloride (21.13g) and anhydrous yttrium chloride (1.84g) were dissolved in absolute ethanol (500ml) to form a mixed chloride ethanol solution, and then caustic soda (13.37g) was added to the mixture In the chloride ethanol solution, mix thoroughly under stirring conditions for 30 minutes, then use a separator to remove the remaining ethanol solution, after drying at 60°C, import the hydroxide precipitation mixture into a crucible, and calcinate at 600°C Keep warm for 2 hours. Finally, the small-sized, super-dispersed yttria-stabilized nano-zirconia (YSZ) coating powder is obtained by repeated and alternate washing with water and ethanol solution three times.

Embodiment 3

[0043] First, dissolve anhydrous zirconium chloride (21.13g), anhydrous yttrium chloride (0.92g), and anhydrous cerium nitrate (1.54g) in anhydrous methanol (500ml) to form a mixed chloride and nitrate methanol solution , then add caustic soda (13.37g) into the mixed chloride and nitrate methanol solution, and mix thoroughly under stirring for 30 minutes, then use a separator to remove the remaining methanol solution, and dry it at 60°C. The hydroxide precipitated mixture was introduced into the crucible, and calcined at 600°C for 2 hours. Finally, the small-sized, super-dispersed ceria-yttria-stabilized nano-zirconia (CYSZ) coating powder is obtained through repeated and alternate washing with water and ethanol solution three times.

[0044] Figure 2a , Figure 2b , Figure 3a , Figure 3b , Figure 4a and Figure 4b These are the SEM and TEM topography images of the zirconia-based coating powders prepared in Examples 1-3 of the present invention, respectively. The av...

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Abstract

The invention belongs to the preparation field of nano coating powder and in particular relates to a preparation method of small-sized ultra-dispersed nano zirconium oxide-based coating powder. The preparation method is primarily finished by two reactions: room temperature settlement and high-temperature calcining by taking zirconium or inorganic salt of zirconium and rare earth, caustic soda and organic alcohol as raw materials. Nano hydroxide precipitate particles associated with salt crystals are generated by room temperature settlement. The salt crystals cover the periphery of the nanoparticles, so as to prevent growth and agglomeration of the nanoparticles in the high-temperature calcining and decomposing reaction process. The raw materials are low in price, the process is simple to operate, and the method of preventing growth and agglomeration of the nanoparticles is novel and skillful. The obtained nano zirconium oxide-based coating powder has the characteristics of excellent heat isolating ability, phase stability and high-temperature oxidization resistance. The invention provides a novel method for industrially producing the nano zirconium oxide-based coating powder, thereby providing more novel alternative materials for development of long-service life nano thermal barrier coatings.

Description

technical field [0001] The invention belongs to the field of nano-coating powder preparation, in particular to a preparation method of small-sized, super-dispersed nano-zirconia-based coating powder. Background technique [0002] Zirconia appears as a monoclinic phase at room temperature, transforms into a tetragonal phase when heated to about 1100°C, and transforms into a cubic phase when heated to a higher temperature. Since a large volume change occurs when the monoclinic phase transforms to the tetragonal phase, and a large volume change occurs in the opposite direction when cooled, it is easy to cause cracking of the product, which limits the application of pure zirconia in high temperature fields. . Zirconia-based ceramic materials doped with rare earth elements such as yttrium, cerium, and lanthanum can maintain the tetragonal phase at room temperature, so there will be no sudden change in volume after heating, which greatly expands the application range of zirconia....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/02B82Y40/00C04B35/48C04B35/626
CPCC01G25/02C01P2002/72C01P2004/03C01P2004/04C01P2004/64C01P2004/80C04B35/48C04B35/626C04B2235/443C04B2235/444C04B2235/447C04B2235/448
Inventor 唐文书肖俊峰高松高斯峰南晴李永君张炯
Owner HUANENG POWER INT INC
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