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High-purity ultrafine uniform monoclinic zirconium dioxide (ZrO2) nanocrystal material, synthesis method therefor and application of high-purity ultrafine uniform monoclinic ZrO2 nanocrystal material

A zirconium dioxide and nanocrystal technology, applied in the field of ceramic materials, achieves the effects of uniform and controllable particle size, avoiding growth and agglomeration, and low cost

Inactive Publication Date: 2019-05-03
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to overcome existing preparation monoclinic zirconia (ZrO 2 ) The shortcomings of the nanocrystalline material process fundamentally solve a series of problems affecting the crystal structure and performance, such as the high hydrolysis reaction activity of the zirconium source and the avoidance of particle agglomeration caused by the subsequent high-temperature roasting treatment, and propose a high-purity ultra-fine uniform single Oblique zirconia (ZrO 2 ) Synthetic method of nanocrystalline material

Method used

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  • High-purity ultrafine uniform monoclinic zirconium dioxide (ZrO2) nanocrystal material, synthesis method therefor and application of high-purity ultrafine uniform monoclinic ZrO2 nanocrystal material
  • High-purity ultrafine uniform monoclinic zirconium dioxide (ZrO2) nanocrystal material, synthesis method therefor and application of high-purity ultrafine uniform monoclinic ZrO2 nanocrystal material
  • High-purity ultrafine uniform monoclinic zirconium dioxide (ZrO2) nanocrystal material, synthesis method therefor and application of high-purity ultrafine uniform monoclinic ZrO2 nanocrystal material

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Experimental program
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Effect test

Embodiment 1

[0024] This embodiment synthesizes high-purity ultrafine uniform monoclinic zirconia (ZrO 2 ) The method of nano crystal material, mainly realizes by following steps:

[0025] (1) Measure 25.0 milliliters of ethanol (Ethanol, C 2 h 6 O) put into a beaker, weigh 2.0 grams of zirconium oxychloride octahydrate (Zirconium Oxychloride Octahydrate, ZrOCl 2 8(H 2 O)) slowly drop into the beaker and mix and stir for 30 minutes;

[0026] (2) Pack the uniformly stirred mixed solution into the polytetrafluoroethylene liner pre-installed with 30mL distilled water, and note that the mixed solution in step (1) does not directly contact with the distilled water;

[0027] (3) Put the polytetrafluoroethylene lining into a stainless steel reaction kettle and seal it, place it in an oven at 180°C for 32 hours, and make water vapor contact with zirconium oxychloride octahydrate under hydrothermal conditions to hydrolyze (see figure 1 );

[0028] (4) After the reaction is finished, the react...

Embodiment 2

[0031] This embodiment synthesizes high-purity ultrafine uniform monoclinic zirconia (ZrO 2 ) The method of nano crystal material, mainly realizes by following steps:

[0032] (1) Measure 25.0 milliliters of ethanol (Ethanol, C 2 h 6 O) put into a beaker, weigh 2.0 grams of zirconium oxychloride octahydrate (Zirconium Oxychloride Octahydrate, ZrOCl 2 8(H 2 O)) slowly drop into the beaker and mix and stir for 20 minutes;

[0033] (2) Pack the uniformly stirred mixed solution into the polytetrafluoroethylene liner pre-installed with 30mL distilled water, and pay attention to the mixed solution in step (1) not in direct contact with the distilled water;

[0034] (3) Put the polytetrafluoroethylene liner into a stainless steel reaction kettle and seal it, place it in an oven at 150° C. for 48 hours, and make water vapor contact with zirconium oxychloride octahydrate to undergo hydrolysis under hydrothermal conditions;

[0035] (4) After the reaction is finished, the reactor i...

Embodiment 3

[0038] This embodiment synthesizes high-purity ultrafine uniform monoclinic zirconia (ZrO 2 ) The method of nano crystal material, mainly realizes by following steps:

[0039] (1) Measure 25.0 milliliters of ethanol (Ethanol, C 2 h 6 O) put into a beaker, weigh 2.0 grams of zirconium oxychloride octahydrate (Zirconium Oxychloride Octahydrate, ZrOCl 2 8(H 2 O)) slowly drop into the beaker and mix and stir for 10 minutes;

[0040] (2) Pack the uniformly stirred mixed solution into the polytetrafluoroethylene liner pre-installed with 30mL distilled water, and note that the mixed solution in step (1) does not directly contact with the distilled water;

[0041] (3) Put the polytetrafluoroethylene liner into a stainless steel reaction kettle and seal it, place it in an oven at 200°C for 24 hours, and make the water vapor contact with zirconium oxychloride octahydrate to undergo hydrolysis under hydrothermal conditions;

[0042] (4) After the reaction is finished, the reactor is...

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Abstract

The invention discloses a high-purity ultrafine uniform monoclinic zirconium dioxide (ZrO2) nanocrystal material, a synthesis method therefor and an application of the high-purity ultrafine uniform monoclinic ZrO2 nanocrystal material. According to the method, the monoclinic ZrO2 nanocrystal material is produced through subjecting water vapor generated from high pressure and high temperature to contact with a zirconium source in a closed reactor under hydrothermal conditions in a manner of taking zirconium oxychloride octahydrate as a zirconium precursor and taking ethanol as a solvent. The evaporated capacity of the water vapor can be controlled through hydrothermal temperature control, then, the hydrolysis rate of the zirconium source is effectively controlled, and the production of amorphous ZrO2 precipitates caused by a rapid hydrolysis reaction can be effectively avoided; no additive or dopant is adopted, and thus, the purity of the monoclinic ZrO2 nanocrystal material is guaranteed; and subsequent high-temperature roasting treatment is not required, so that the growth and agglomeration of monoclinic ZrO2 crystal grains are avoided, and the obtained monoclinic ZrO2 nanocrystalmaterial is ultrafine and uniform.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a high-purity ultrafine uniform monoclinic zirconia (ZrO 2 ) nanocrystalline material and its synthesis method. Background technique [0002] Zirconia (ZrO 2 ) is the main oxide of zirconium, usually a white odorless and tasteless polycrystalline powder, usually containing a small amount of chromium dioxide (CrO 2 ) and hafnium dioxide (HfO 2 ) and other impurities. Zirconia (ZrO 2 ) Nanocrystalline materials not only have inherent characteristics such as high melting point and hardness, good thermal stability and chemical stability, but also have special surface chemical properties such as acidity and alkalinity, oxidation and reduction, so that they can be It is widely used in many fields such as ceramic toughening, ceramic insulation, ceramic shading, optoelectronic devices, solar cells, gas sensors, adsorption, acid-base catalysis and photocatalysis. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/02B82Y30/00B01J21/06B01J32/00B01J35/10C07C5/27C07C9/18
Inventor 张研
Owner CHANGAN UNIV
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