Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of monodisperse yttria-stabilized zirconia nano-powder

A technology for stabilizing zirconia and nano-powders, which is applied in the field of preparation of yttria-stabilized zirconia nano-powders, which can solve the problems of long cycle, high activity and complex operation

Active Publication Date: 2020-12-25
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
View PDF12 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of monodisperse yttria-stabilized zirconia nano-powder
  • Preparation method of monodisperse yttria-stabilized zirconia nano-powder
  • Preparation method of monodisperse yttria-stabilized zirconia nano-powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing monodisperse yttria-stabilized zirconia nanopowders, comprising the steps of:

[0028] (1) At room temperature and normal pressure, weigh 32.23g zirconium oxychloride octahydrate and 1.17g yttrium chloride and dissolve them in deionized water. After the dissolution is complete, the total volume of the solution is 100mL, and it is prepared into a solution containing yttrium-zirconium ions, wherein The molar concentration of zirconium ions is 1mol / L, and the molar concentration of yttrium ions is 0.06mol / L; add 0.25g of sodium dodecyl sulfate and 12.61g of citric acid monohydrate to the solution containing yttrium and zirconium ions in sequence, and place 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 1mol / L to the mixed solution at a rate of 3mL / min until the pH of the mixed solution is 4-5...

Embodiment 2

[0035] A method for preparing monodisperse yttria-stabilized zirconia nanopowders, comprising the steps of:

[0036] (1) At room temperature and normal pressure, take 14.17g zirconium sulfate and 1.92g yttrium nitrate hexahydrate and dissolve them in deionized water. After the dissolution is complete, the total volume of the solution is 100mL. The molar concentration is 0.5mol / L, and the molar concentration of yttrium ion is 0.05mol / L; Add 0.31g sodium dodecylbenzenesulfonate and 10.51g monohydrate citric acid successively to the solution containing yttrium-zirconium ion; Stir magnetically 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 1mol / L to the mixed solution at a rate of 5mL / min until the pH of the mixed solution is Be in the range of 4-5; After stopping the dropwise addition, continue magnetic stirring for 0.5 hours and then take it out from ...

Embodiment 3

[0043] A method for preparing monodisperse yttria-stabilized zirconia nanopowders, comprising the steps of:

[0044] (1) At room temperature and normal pressure, weigh 32.23g zirconium oxychloride octahydrate and 15.64g yttrium chloride and dissolve them in deionized water. After the dissolution is complete, the total volume of the solution is 200mL, and it is prepared into a solution containing yttrium-zirconium ions, wherein The molar concentration of zirconium ion is the zirconium ion solution of 0.5mol / L, and the molar concentration of yttrium ion is 0.08mol / L; Add 3.6g polyethylene glycol 3000 and 24.38g citric acid monohydrate to the solution containing yttrium-zirconium ion; 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; using a syringe pump, slowly added ammonia water with a molar concentration of 2mol / L to the mixed solution at a rate of 2mL / min until the mixed solution The pH ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
specific surface areaaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of monodisperse yttria-stabilized zirconia nano powder. The preparation method comprises the following steps: (1) adding a complexing agent and a dispersing agent into an aqueous solution containing zirconium salt and yttrium salt to obtain a solution of a zirconium-yttrium complex, performing water bath on the solution of the zirconium-yttrium complex,and adding a neutralizing agent into the solution of the zirconium-yttrium complex under a stirring condition to obtain an aqueous solution of zirconium-yttrium sol; and (2) carrying out vacuum freeze drying on the aqueous solution of the zirconium-yttrium sol after atomization and liquid nitrogen freeze drying to obtain zirconium-yttrium precursor powder, and carrying out heat treatment on the zirconium-yttrium precursor powder in an air atmosphere to obtain the monodisperse yttria-stabilized zirconia nano-powder. The crystal form of the yttria-stabilized zirconia nano-powder is a tetragonalcrystal form, the secondary particle size is 50-500 nm, the specific surface area is 10-400 m <2> / g, and the yttria-stabilized zirconia nano-powder can be applied to the fields of electrolyte materials of solid fuel cells, zirconia ceramics for dentistry and the like.

Description

technical field [0001] The invention relates to the technical field of powder material preparation, in particular to a method for preparing monodisperse yttria-stabilized zirconia nanometer powder. Background technique [0002] Stabilized zirconia is a functional ceramic material widely used in industry. The commonly used stabilizers include yttrium oxide, magnesium oxide, calcium oxide, scandium oxide, etc., especially yttrium oxide. The performance of industrially applied yttria-stabilized zirconia functional ceramic materials is affected by the initial yttria-stabilized zirconia powder, which usually includes factors such as the particle size of the initial powder, the uniformity of the 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-precipita...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(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