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A kind of high (001) surface flaky zirconia and its preparation method

A technology of zirconia and flakes, applied in zirconia and other directions, can solve the problems of zirconia morphology limitations, etc., and achieve the effect of intact crystal plane, low reaction temperature and uniform particles

Active Publication Date: 2020-08-11
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of previous synthesis methods and processes, compared with some other functional materials, the synthesis of zirconia has limitations both in the initial raw materials and in the morphology of the synthesized zirconia.

Method used

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  • A kind of high (001) surface flaky zirconia and its preparation method
  • A kind of high (001) surface flaky zirconia and its preparation method
  • A kind of high (001) surface flaky zirconia and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0067] (1) 0.92g of fluozirconic acid solution (45% concentration of H 2 ZrF 6 Solution, Shanghai McLean Company, the same below) was dissolved in 100ml deionized water, and was diluted to obtain a 0.02mol / L solution to be reacted, and the prepared reaction solution was packed into a 200ml hydrothermal reactor, which was sealed at high temperature High-pressure reaction kettle, high-temperature and high-pressure reaction kettle is connected with high-precision ultra-high pressure pressure gauge, ventilation pipe, air inlet, and gas outlet stop valve. High-temperature and high-pressure reaction kettle has a metal shell, and a polytetrafluoroethylene internal Lining, place a flat gold sheet at the bottom of the reactor, tighten the reactor, close the gas outlet shut-off valve, open the air inlet shut-off valve, inject argon into the kettle through the ventilation pipe to a pressure of 80MPa, close the air inlet to stop The valve stops gas injection, and the reactor is heated th...

Embodiment 2

[0071] (1) Dissolve 0.46g of 45% concentration of fluozirconic acid solution in 100ml of deionized water, dilute to obtain a 0.01mol / L solution to be reacted, and put the prepared reaction solution into a 200ml hydrothermal reaction kettle, hydrothermal reaction kettle In order to seal the high-temperature and high-pressure reactor, the high-temperature and high-pressure reactor is connected with a high-precision ultra-high pressure pressure gauge, a ventilation pipe, an air inlet, and an outlet valve. Lining, place a flat gold sheet at the bottom of the reactor, tighten the reactor, close the gas outlet shut-off valve, open the air inlet shut-off valve, inject argon gas into the kettle through the ventilation pipe to a pressure of 50MPa, close the air inlet to stop The valve stops gas injection, and the reactor is heated through the heating furnace, and the reaction temperature is set to 250°C;

[0072] (2) After the temperature rises to 250°C, open the cut-off valve of the a...

Embodiment 3

[0075] (1) Dissolve 0.92g of 45% concentration of fluozirconic acid solution in 100ml deionized water, dilute to obtain a 0.02mol / L solution to be reacted, and put the prepared reaction solution into a 200ml hydrothermal reaction kettle, hydrothermal reaction kettle In order to seal the high-temperature and high-pressure reactor, the high-temperature and high-pressure reactor is connected with a high-precision ultra-high pressure pressure gauge, a ventilation pipe, an air inlet, and an outlet valve. Lining, after tightening the reactor, close the shut-off valve of the gas outlet, open the shut-off valve of the inlet, inject argon into the kettle through the ventilation pipe to a pressure of 80MPa, close the shut-off valve of the inlet to stop the gas injection, and heat the reactor through the heating furnace. Heating is carried out, and the reaction temperature is set to 250°C;

[0076] (2) After the temperature rises to 250°C, open the cut-off valve of the air inlet in step ...

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Abstract

The present invention provides a preparation method of high (001) plane flaky zirconia, which is prepared through hydrolysis and self-reaction of a single reagent of fluozirconic acid. According to the present invention, only two reagents, fluozirconic acid and ethanol, are used in the whole process, 5 synthetic raw materials are simple and easily available, reaction time is extremely short, and reaction temperature is low, thereby avoiding complicated procedures of reaction, calcination, cleaning and the like, and simplifying the process; and synthesized flaky zirconia particles are uniform, intact in crystal plane, high in (001) plane proportion and high in specific surface area, and thus have good application prospects such as adsorption, catalysis and sensing. Drawings x i i E Standard baddeleyite 11 11 1 o 1G2,70 3WO 45G SAG 6W3 72G Raman displacement (cm) * Warmingup * k * Eu * .- ~ * £ * *S * * * qbqh 4%44 4 4 a

Description

technical field [0001] The invention relates to the technical field of nanometer multifunctional materials, in particular to a high (001) surface flaky zirconia and a preparation method thereof. Background technique [0002] Zirconia (ZrO 2 ) is a very important structural and functional material with excellent physical and chemical properties, such as high melting point (up to 2700 °C), high boiling point, high hardness, small thermal conductivity, large thermal expansion coefficient and good particle electrical conductivity Rate, and wear resistance, high temperature resistance, corrosion resistance and oxidation resistance. Since the 1980s, in addition to being used as a traditional refractory material and ceramic glaze, zirconia has also received more and more attention in the application of energy, environment and materials. The nano-micron zirconia is different from conventional materials in terms of optics, mechanics, thermodynamics and electromagnetics due to its t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G25/02
CPCC01G25/02C01P2002/82C01P2004/02C01P2004/03C01P2004/20
Inventor 丁兴严海波
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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