Preparation process for superfine powder of zirconium oxide

A technology of ultra-fine powder and zirconia, which is applied in the direction of zirconia, can solve the problems that are not suitable for making fine ceramics, the particle size of zirconia powder is small, and it is difficult to realize industrialization, so as to achieve easy industrialization, small particle size, and high technology The effect of easing conditions

Inactive Publication Date: 2005-01-05
HARBIN ENG UNIV
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Problems solved by technology

[0007] The disadvantages of the latter two methods are that the required supercritical conditions have higher requirements on the equipment, the process conditions are harsher, the energy consumption is large, and it is difficult to realize industrialization; and because the obtained zirconia powder has a small particle size and a large specific surface area , useful as a catalyst or catalyst carrier for various chemical reactions and not suitable for making fine ceramics

Method used

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Embodiment Construction

[0013] Preferred implementation methods of the present invention are given below.

[0014] Take by weighing 240g zirconium oxychloride (purity 99.5%) and dissolve in 240ml water, be made into 2.15mol / l zirconium oxychloride aqueous solution, get 1440ml distilled water in addition, add 588g ammonium carbonate to make ammonium carbonate solution, add this solution under stirring In the prepared zirconium oxychloride aqueous solution, make ammonium zirconium carbonate solution, add about 1200ml of ammonia water under stirring, until the pH value of the solution is 8-9, and obtain a white precipitate, filter, and wash with deionized water until the solution is free. Chloride ions, washed with water, filtered to obtain a filter cake, and the filter cake was added to 1500ml of absolute ethanol, stirred to a uniform state, filtered, then soaked in 600ml of absolute ethanol, stirred to become an emulsion, and placed in a pressure reactor Use non-supercritical drying method, slowly hea...

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PUM

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Abstract

The invention relates to a ultrafine zirconium oxide (ZrO2) powder preparing method. ZrO2 is a high temperature-resistant, wearable, corrosion-resistant inorganic nonmetallic material, the proper-sized ultrafine ZrO2 powder is an important chemical raw material to prepare high-performance refined ceramics, like electronic ceramics, functional ceramics, structural ceramics, etc. and has increasingly wide applications in the technical fields of aviation, spaceflight, machinery, chemical engineering, electronics, automobiles, energy sources, etc. It adopts zirconium oxychloride and salvolatile as precursor raw material, uses uniform codeposition method to prepare wet ZrO2 gel, then drying at 100-150 deg.C at 0.3-1.0 MPa, and burning at 700-1000 deg.C to make ultrafine ZrO2 powder. It can obtain the ultrafine ZrO2 powder, particle size 0.1-0.5 mum, specific surface area 15-30 sq m / g and distribution range of particle size narrow. The ultrafine ZrO2 powder properly acts as the chemical raw material for refined ceramics.

Description

technical field [0001] The present invention relates to a kind of zirconia (ZrO 2 ) The preparation method of ultrafine powder. Zirconia is an inorganic non-metallic material with high temperature resistance, wear resistance and corrosion resistance. Zirconia ultrafine powder with appropriate particle size is an important chemical industry for preparing high-performance fine ceramics, such as electronic ceramics, functional ceramics and structural ceramics. Raw materials are more and more widely used in aviation, aerospace, machinery, chemical industry, electronics, automobile, energy and other technical fields. Background technique [0002] Zirconia (ZrO 2 ) There are many methods for ultrafine powder, such as sol-gel method, inert gas deposition method, chemical vapor deposition method, hydrothermal method, plasma method, laser induction method, etc. The sol-gel method also includes chemical coprecipitation method, hydrolysis method, alkoxide decomposition method and so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/02C04B35/622C04B35/626
Inventor 刘文彬
Owner HARBIN ENG UNIV
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