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A kind of preparation method of monodisperse yttria stabilized zirconia nanopowder

A technology for stabilizing zirconia and nano-powder is applied in the field of preparation of yttria-stabilized zirconia nano-powder, which can solve the problems of agglomeration, complicated operation and long cycle.

Active Publication Date: 2022-06-28
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this method is that the crystal form of the prepared powder is good, the secondary particle size is small, the particle size distribution is narrow, and the activity is large. The disadvantage is that the sol has a long cycle in the gelling process, and it is easy to agglomerate during drying, resulting in a large shrinkage rate. , complex operation, etc.

Method used

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  • A kind of preparation method of monodisperse yttria stabilized zirconia nanopowder
  • A kind of preparation method of monodisperse yttria stabilized zirconia nanopowder
  • A kind of preparation method of monodisperse yttria stabilized zirconia nanopowder

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Embodiment 1

[0027] A preparation method of monodispersed yttria-stabilized zirconia nano-powder, comprising the following steps:

[0028] (1) At room temperature and normal pressure, weigh 32.23 g of zirconium oxychloride octahydrate and 1.17 g of yttrium chloride and dissolve them in deionized water. After the dissolution is complete, the total volume of the solution is 100 mL, and prepare a solution containing yttrium zirconium ions, wherein The molar concentration of zirconium ions is 1 mol / L, and the molar concentration of yttrium ions is 0.06 mol / L; 0.25 g of sodium dodecyl sulfate and 12.61 g of citric acid monohydrate are added to the solution containing yttrium and zirconium ions in sequence, and the solution is heated in a water bath at 60°C. Stir with medium magnetic force for 0.5 hours until the mixed solution is colorless, clear and transparent; use a syringe pump to slowly add ammonia water with a molar concentration of 1 mol / L to the mixed solution, at a rate of 3 mL / min, unt...

Embodiment 2

[0035] A preparation method of monodispersed yttria-stabilized zirconia nano-powder, comprising the following steps:

[0036] (1) At room temperature and normal pressure, weigh 14.17g of zirconium sulfate and 1.92g of yttrium nitrate hexahydrate and dissolve them in deionized water. After the dissolution is complete, the total volume of the solution is 100mL, and prepare a solution containing yttrium and zirconium ions. The molar concentration is 0.5 mol / L, and the molar concentration of yttrium ions is 0.05 mol / L; 0.31 g of sodium dodecylbenzenesulfonate and 10.51 g of citric acid monohydrate are added to the solution containing yttrium zirconium ions in turn; Magnetically stir in a water bath at 80°C for 0.5 hours until the mixed solution is colorless, clear and transparent; use a syringe pump to slowly add urea solution with a molar concentration of 1 mol / L to the mixed solution, at a rate of 5 mL / min, until the pH value of the mixed solution be within the range of 4-5; aft...

Embodiment 3

[0043] A preparation method of monodispersed yttria-stabilized zirconia nano-powder, comprising the following steps:

[0044] (1) At room temperature and normal pressure, weigh 32.23 g of zirconium oxychloride octahydrate and 15.64 g of yttrium chloride and dissolve them in deionized water. After the dissolution is complete, the total volume of the solution is 200 mL, and is prepared into a solution containing yttrium zirconium ions, wherein A zirconium ion solution with a molar concentration of zirconium ions of 0.5 mol / L and a molar concentration of yttrium ions of 0.08 mol / L; add 3.6 g polyethylene glycol 3000 and 24.38 g citric acid monohydrate to the solution containing yttrium zirconium ions; The solution was magnetically stirred in a water bath at 80°C for 0.5 hours until the mixed solution was colorless, clear and transparent; the ammonia water with a molar concentration of 2 mol / L was slowly added dropwise to the mixed solution using a syringe pump at a rate of 2 mL / mi...

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Abstract

The invention discloses a method for preparing monodisperse yttria-stabilized zirconia nanopowder. The preparation method comprises the following steps: (1) adding a complexing agent and a dispersant to an aqueous solution containing zirconium salt and yttrium salt to obtain a solution of the zirconium-yttrium complex, carrying out the solution of the zirconium-yttrium complex in a water bath, and stirring Add a neutralizing agent to the solution of the zirconium-yttrium complex under certain conditions to obtain an aqueous solution of the zirconium-yttrium sol; (2) vacuum freeze-dry the aqueous solution of the zirconium-yttrium sol to obtain the zirconium-yttrium precursor after atomization and liquid nitrogen freeze-drying The powder, the zirconium yttrium precursor powder is heat-treated in an air atmosphere to obtain a monodisperse yttria-stabilized zirconia nanopowder. The crystal form of the yttria-stabilized zirconia nanopowder proposed by the present invention is a tetragonal crystal form, the secondary particle size is 50-500nm, and the specific surface area is 10-400m 2 / g, it can be applied to electrolyte materials for solid fuel cells, zirconia ceramics for dental use and other fields.

Description

technical field [0001] The invention relates to the technical field of powder material preparation, in particular to a preparation method of monodisperse yttria-stabilized zirconia nano-powder. Background technique [0002] Stabilized zirconia is a functional ceramic material widely used in industry. The commonly used stabilizers are yttrium oxide, magnesium oxide, calcium oxide, scandium oxide, etc., especially yttrium oxide. The performance of yttria-stabilized zirconia functional ceramic materials used in industrial applications is affected by the initial yttria-stabilized zirconia powder, which usually includes the particle size of the initial powder, the uniformity of stabilizer distribution, and the monodispersity of the particles. , and these factors are closely related to the preparation method of the initial powder. [0003] At present, there are many preparation methods for yttria-stabilized zirconia powder, mainly including: chemical co-precipitation method, hydr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/626
CPCC04B35/48C04B35/62605C04B2235/3246C04B2235/5445C04B2235/5454
Inventor 陶进长曹洪杨高远李伟袁祥奕郭秋松张魁芳
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI