High-dispersity nano-zirconia particles and method for preparing transparent dispersoid of high-dispersity nano-zirconia particles

A technology of nano-zirconia and zirconia, applied in zirconia, nanotechnology, nanotechnology, etc., can solve the problems of easy agglomeration of nano-zirconia particles, poor optical properties of composite materials, and reduced agglomeration, and achieve wide dispersion And compatibility, good transparency, easy to operate effect

Inactive Publication Date: 2018-09-14
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method adopts the method of pyrolyzing inorganic zirconium salt in a high-gravity environment to directly prepare nano-zirconia particles, and the agglomeration is greatly reduced with the increase of the high-gravity level, and then it is directly transparent after washing and modification. Zirconium liquid phase dispersion can solve the problems of easy agglomeration of nano-zirconia particles, poor dispersion, and poor optical properties of composite materials, thus endowing products with higher application performance and wider application range

Method used

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  • High-dispersity nano-zirconia particles and method for preparing transparent dispersoid of high-dispersity nano-zirconia particles
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  • High-dispersity nano-zirconia particles and method for preparing transparent dispersoid of high-dispersity nano-zirconia particles

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Experimental program
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Effect test

Embodiment 1

[0041] 1) Weigh 5 grams of basic zirconium carbonate, 1 gram of sodium hydroxide and 400 milliliters of deionized water, and stir to form a slurry;

[0042]2) Put the slurry into the internal circulation supergravity reactor, control the temperature to 80° C., the rotational speed to 500 rpm, and the reaction time to 8 hours.

[0043] 3) After the reaction is completed, take the discharge liquid from the discharge port, wash the precipitate with 1 liter of clear water, take 0.1 g of the washed precipitate and put it in 10 ml of deionized water to form the aqueous phase dispersion, wherein the particle size of the nanoparticles under the electron microscope is 5 nanometers . Dynamic light scattering laser particle size analysis The average particle size of nanoparticles is 313.5 nm.

Embodiment 2

[0045] 1) Weigh 5 grams of basic zirconium carbonate, 1 gram of sodium hydroxide and 400 milliliters of deionized water, and stir to form a slurry;

[0046] 2) Put the slurry into the internal circulation supergravity reactor, control the temperature to 80°C, the rotational speed to 1000 rpm, and the reaction time to 8 hours.

[0047] 3) After the reaction is completed, take the discharge liquid from the discharge port, wash the precipitate with 1 liter of water, take 0.1 g of the washed precipitate and put it in 10 ml of deionized water to be the aqueous phase dispersion, wherein the particle size of the nanoparticles under the electron microscope is 4 nanometers . Dynamic light scattering laser particle size analysis The average particle size of nanoparticles is 254.6 nm.

Embodiment 3

[0049] 1) Weigh 50 grams of basic zirconium carbonate, 75 grams of sodium hydroxide and 2500 milliliters of deionized water, and stir to form a slurry;

[0050] 2) Put the slurry into the internal circulation supergravity reactor, control the temperature at 80° C., the rotational speed at 1500 rpm, and the reaction time at 8 hours.

[0051] 3) After the reaction is completed, take the discharge liquid from the discharge port, wash the precipitate with 1 liter of clear water, take 0.1 g of the washed precipitate and put it in 10 ml of deionized water to form the aqueous dispersion, wherein the particle size of the nanoparticles under the electron microscope is 3 nanometers . Dynamic light scattering laser particle size analysis The average particle size of nanoparticles is 127.5 nm.

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Abstract

The invention discloses high-dispersity nano-zirconia particles and a method for preparing transparent dispersoid of the high-dispersity nano-zirconia particles. The solid content of transparent nano-zirconia liquid phase dispersoid ranges from 1 wt% to 80 wt%, zirconia crystals are small in grain size and even in distribution, the one-dimensional size ranges from 1 nanometer to 10 nanometers, andthe average grain size is 3 nanometers. According to the preparation method, the nano-zirconia particles are prepared through a method for pyrolyzing inorganic zirconium salt in a supergravity environment, the aggregation performance is greatly reduced as the supergravity level is improved, and then the transparent zirconia liquid phase dispersoid is directly obtained after washing and modifyingare carried out; the problem that nano-zirconia particles are easy to aggregate, poor in dispersity and poor in composite optical performance can be solved, and therefore the product has higher application performance and a wider application range.

Description

technical field [0001] The invention relates to the field of fine chemical industry, in particular to a preparation method of highly dispersed nano zirconia particles and a transparent dispersion thereof. Background technique [0002] Zirconium dioxide is a versatile refractory and technical ceramic material with high mechanical strength, fracture toughness, hardness, wear resistance and thermal shock resistance. Zirconium dioxide has excellent properties such as high melting point and boiling point, high hardness, insulator at normal temperature, and electrical conductivity at high temperature. As such it is used in many applications including automotive engine parts, cutting tools, abrasives and enamels. Its low thermal conductivity and coefficient of expansion, as well as its excellent chemical resistance, make it an excellent candidate for thermal barrier coatings in harsh environments. Zirconia has been widely used in various fields such as catalysts and catalyst supp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/02B82Y30/00
CPCB82Y30/00C01G25/02C01P2004/04C01P2004/64C01P2006/22
Inventor 蒲源何相磊唐睿婕王丹王洁欣曾晓飞陈建峰
Owner BEIJING UNIV OF CHEM TECH
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