Yttrium-doped zirconium oxide (YSZ) powder having multistage nano structure, and preparation method and application thereof

A technology of yttrium-doped zirconia and nanostructure, which is applied in the field of multi-level nanostructure yttrium-doped zirconia powder and its synthesis, can solve the influence of powder morphology and thermal conductivity. There are no relevant reports, and there is no YSZ There are few reports on the synthesis of powder and YSZ powder, etc.

Active Publication Date: 2013-03-20
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, the current research is only limited to the study of pores and microcracks in the coating structure, and there are no related reports on the influence of powder morphology on its thermal conductivity, and there are few reports on the synthesis of YSZ powders with specific morphology See
[0009] In summary, there is a lack of a technical solution for preparing YSZ powder with a specific shape and applying it to the field of thermal barrier coatings.

Method used

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  • Yttrium-doped zirconium oxide (YSZ) powder having multistage nano structure, and preparation method and application thereof
  • Yttrium-doped zirconium oxide (YSZ) powder having multistage nano structure, and preparation method and application thereof
  • Yttrium-doped zirconium oxide (YSZ) powder having multistage nano structure, and preparation method and application thereof

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preparation example Construction

[0071] A second aspect of the present invention provides a method for preparing the multilevel nanostructure yttrium-doped zirconia (YSZ) powder according to the present invention, which includes the following steps:

[0072] (1) configure the reaction solution containing zirconium source and yttrium source;

[0073] The zirconium source is a zirconium source containing sulfate ions;

[0074] (2) The solution obtained in step (1) is subjected to a hydrothermal reaction to obtain a hydrothermal product;

[0075] (3) Washing the hydrothermal product obtained in step (2), drying and calcining to obtain the final powder.

[0076] In a specific embodiment of the present invention, the step (3) includes washing the hydrothermal product obtained in the step (2), drying it and putting it into a muffle furnace for calcination or direct calcination without drying to obtain the final powder body.

[0077] In a specific embodiment of the present invention, the doping amount of the yttr...

Embodiment approach

[0096] For realizing the purpose of the invention, the technical scheme that the present invention takes is as follows:

[0097] A YSZ powder with multi-level nanostructure is prepared by hydrothermal-calcination technology.

[0098] The multi-level nanostructure powder is 3-15mol% yttrium-doped zirconia powder.

[0099]The above-mentioned multilevel nanostructure YSZ powder preparation method, the process is as follows:

[0100] (1) configure the reaction solution containing zirconium source and yttrium source;

[0101] (2) Add the clarified solution obtained in step (1) into a hydrothermal kettle according to a certain filling ratio for hydrothermal treatment.

[0102] (3) The product of step (2) is washed, dried, and then put into a muffle furnace for calcination or directly calcined without drying.

[0103] In step (1), preferred zirconium source is zirconium sulfate in the selected reactant; Yttrium source is preferably all kinds of soluble yttrium salts (as chloride, ...

Embodiment 1

[0122] 0.4mmol Y(NO 3 ) 3 ·6H 2 O, 4.6mmol Zr(SO 4 ) 2 4H 2 O was dissolved in 40ml distilled water, mixed and stirred until dissolved;

[0123] Take 35mL of the clear solution and pour it into a hydrothermal kettle with a volume of 50mL, control the temperature at 200°C, react for 8 hours and cool to room temperature with the furnace;

[0124] Centrifuge the hydrothermal product, remove the supernatant, disperse it with distilled water, and then centrifuge again, repeat this process, wash twice with water, wash once with ethanol, and then dry in an oven at 80°C for 3 hours;

[0125] Put the dried powder into a corundum crucible, place it in a muffle furnace for calcination, use a heating rate of 10°C / min to rise to 700°C, and then keep it at 700°C for 4 hours to obtain the final YSZ powder.

[0126] Take 0.15 g of the prepared multi-level nanostructure YSZ powder and adopt a pressure of 6 MPa to hold the pressure for 30 seconds to obtain a disc-shaped green body; heat-t...

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Abstract

The invention provides yttrium-doped zirconium oxide (YSZ) powder having a multistage nano structure. The powder has a flower-like structure, wherein the flower-like structure is a multistage nano structure formed by the self assembly of laminated polycrystalline structures; the inside is formed by the stacking of multiple layers of folded laminated polycrystalline structures; the maximum integral particle size of the flower-like structure does not exceed 15 mu m. The invention also provides a preparation method and application of the powder. According to the invention, the YSZ power having specific morphology is obtained and can be used in the field of thermal barrier coatings.

Description

technical field [0001] The invention relates to a multilevel nanostructure yttrium-doped zirconia (YSZ) powder and a synthesis method thereof, which can be applied to the field of high-temperature heat protection coatings. Background technique [0002] Thermal barrier coatings (TBCs) are currently one of the most advanced high-temperature protective coatings, mainly used for high-temperature engine hot-end parts to increase the inlet temperature of the engine, thereby improving fuel efficiency; better protecting the substrate against high-temperature environments corrosion and prolong the service life of hot end components. In addition, based on its heat insulation and corrosion resistance, thermal barrier coatings can also be used in blast furnace tuyere to protect the base material from the extreme temperature environment of the tuyere heat flow and prolong the service life of the blast furnace. [0003] It can be seen that thermal barrier coatings are mainly operated in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/02B82Y30/00
Inventor 高彦峰曹凤梅陈宏飞刘新玲罗宏杰金平实
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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