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A method for synthesizing ordered layered nano-zirconia polycrystalline powder with tetrahydrofuran as template

A tetrahydrofuran, polycrystalline powder technology, applied in zirconia, nanotechnology, nanotechnology and other directions, can solve the problems of poor thermal stability, disordered nanocrystal arrangement, etc., and achieve the effect of reducing production cost and good thermal stability

Inactive Publication Date: 2015-11-25
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To overcome the shortcomings of ordered nanostructured zirconia that require surfactants or polymers as templates to be synthesized; to overcome the shortcomings of poor thermal stability and disordered nanocrystal arrangement of existing ordered nanostructured zirconia powders

Method used

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  • A method for synthesizing ordered layered nano-zirconia polycrystalline powder with tetrahydrofuran as template
  • A method for synthesizing ordered layered nano-zirconia polycrystalline powder with tetrahydrofuran as template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Dissolve 0.005mol zirconium oxychloride in a flask filled with 25ml of water, then add 25ml of THF in the flask to prepare zirconium oxychloride-tetrahydrofuran-water mixed solution for use;

[0026] (2) Dissolve 0.72g of sodium hydroxide in a flask filled with 25ml of water, then add 25ml of tetrahydrofuran to prepare a sodium hydroxide-tetrahydrofuran-water mixture for use;

[0027] (3) under stirring conditions, the mixed solution prepared in the step (2) is added in the flask in the step (1), the temperature is raised, and the reaction is refluxed for 2 hours;

[0028] (4) Then the mixture obtained in the step (3) is moved to the inner sleeve polytetrafluoroethylene container of the reactor, sealed, the reactor is put into an oven, the temperature is raised to 160° C., and the mixed solvent is thermally reacted for 12 hours under autogenous pressure. Hour;

[0029] (5) Standing at room temperature for 1 day, then washing with water for 3 times, and then centrif...

Embodiment 2

[0034] The reflux reaction time in the step (3) among the embodiment 1 is set as 1 hour. Other steps are with embodiment 1. Obtain product with embodiment 1.

Embodiment 3

[0036] The temperature in step (4) in embodiment 1 is adjusted to 140 ℃, and other steps are the same as embodiment 1. The product obtained is the same as in Example 1.

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Abstract

The invention relates to a method for synthesizing ordered layered nano-zirconium oxide polycrystalline powder by taking tetrahydrofuran as a template. The method comprises the following steps: (1) taking 25 parts of zirconium oxychloride-tetrahydrofuran-water mixed solution; (2) taking 25 parts of sodium hydroxide-tetrahydrofuran-water mixed solution; (3) adding the mixed solution prepared in the step (2) into a flask in the step (1), and performing reflux reaction for 1-4h; (4) heating a mixture obtained in the step (3) to 100-160 DEG C, and performing thermal reaction on a mixed solvent under self-generated pressure for 12-36h; (5) standing at room temperature, then washing with water, further performing suction filtration or centrifugal separation, and drying to obtain white powder, namely the ordered layered nano-zirconium oxide polycrystalline powder; (6) heating the powder obtained in the step (5) to 600 DEG C, and then calcining for 2h to obtain the product, namely the ordered layered nano-zirconium oxide polycrystalline powder after calcination. The zirconium oxide polycrystalline powder obtained according to the method provided by the invention has an ordered layered nano-structure, and a surfactant, a polymer and other template agents are not required, so that the production cost is reduced.

Description

technical field [0001] The technical solution of the present invention belongs to the technical field of synthesis of ordered nanostructure materials, specifically a method for preparing ordered layered nano-zirconia polycrystalline powder by using small organic molecules as templates. Background technique [0002] Zirconia is a transition metal oxide, which is acidic, alkaline, oxidizing and reducing at the same time, and has a high melting point (2700 ° C) and a high boiling point, a large thermal expansion coefficient, high temperature resistance, small thermal conductivity, and wear resistance Good properties such as good corrosion resistance and good corrosion resistance, while the ordered nanostructured zirconia has some unique properties, such as an insulator at room temperature, and conductivity, sensitivity, and toughness at high temperatures, etc., in wear-resistant materials , refractory materials, thermal barrier coating materials, fuel cells, catalyst carriers, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G25/02B82Y30/00B82Y40/00
Inventor 纪秀杰张国锋刘超程博闻黄洁茹
Owner TIANJIN POLYTECHNIC UNIV
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