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Preparation of zirconia superfine powder by hydrolysis method

A technology of ultra-fine powder and zirconia, which is used in the field of inorganic chemical synthesis and new materials, can solve the problems of complex post-processing process, and achieve the effect of narrow particle size distribution, short hydrolysis time and excellent sintering performance.

Inactive Publication Date: 2005-06-29
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process needs to add a large amount of solvent, making the post-treatment process complicated

Method used

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  • Preparation of zirconia superfine powder by hydrolysis method

Examples

Experimental program
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Effect test

Embodiment 1

[0012] Weigh 100g of zirconium oxychloride crystals (purity 99.5%) and dissolve them in 950ml of water to form a 0.31mol / L zirconium oxychloride aqueous solution; slowly add 17% ammonia water to the zirconium oxychloride solution dropwise under stirring, when the pH of the solution When the value reaches 2.0, stop adding ammonia water dropwise; add 100mL of 30% hydrogen peroxide solution under stirring, then raise the temperature until the solution boils, keep it for 24h, end the hydrolysis reaction, and cool down to room temperature naturally; adjust the pH value to 8 with ammonia water to obtain a milky white suspension solution, filtered, and washed with distilled water until the solution has no chloride ions; after washing, add the filter cake to 800mL of absolute ethanol, stir to make an emulsion, filter, then soak in 400mL of absolute ethanol, and stir to make an emulsion Put it into the pressure reactor and heat it. When the pressure reaches 0.8MPa, start to slowly vent ...

Embodiment 2

[0014] Weigh 100g of zirconium oxychloride crystals (purity 99.5%) and dissolve them in 950mL of water to form a 0.31mol / L zirconium oxychloride aqueous solution; slowly add 17% ammonia water to the zirconium oxychloride solution dropwise under stirring, when the pH of the solution When the pH value reaches 2.2, stop adding ammonia water dropwise; add 50mL of 50% hydrogen peroxide solution under stirring, then raise the temperature until the solution boils, keep it for 24h, end the hydrolysis reaction, and naturally cool to room temperature; adjust the pH value to 9 with ammonia water to obtain a milky white suspension liquid, filtered, and washed with deionized water until the solution has no chloride ions; after washing, add the filter cake to 800mL of absolute ethanol, stir to make an emulsion, filter, then add 400mL of absolute ethanol, and stir to make an emulsion Turbid liquid; put it into a pressure reactor and heat it. When the pressure reaches 0.8MPa, start to slowly v...

Embodiment 3

[0016] Weigh 150g of zirconium oxychloride crystals (purity 99.5%) and dissolve them in 950mL of water to form a 0.46mol / L zirconium oxychloride aqueous solution; slowly add 17% ammonia water to the zirconium oxychloride solution dropwise under stirring, when the pH of the solution When the pH value reaches 1.9, stop adding ammonia water dropwise; add 150 mL of 30% hydrogen peroxide solution under stirring, then raise the temperature until the solution boils, keep it for 24 hours, end the hydrolysis reaction, and naturally cool to room temperature; adjust the pH value to 8.5 with ammonia water to obtain a milky white suspension solution, filtered, and washed with deionized water until the solution has no chloride ions; after washing, add the filter cake to 1500mL of absolute ethanol, stir until uniform, filter, then add 600mL of absolute ethanol, and stir to make an emulsion Put it into the pressure reactor and heat it. When the pressure reaches 0.8MPa, start to vent slowly to ...

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Abstract

The invention discloses a superfine zirconium oxide powder production in a water decomposing method. The tech is by low temperature low pressure drying and burning the zirconium oxide wet gelatin composed in water decomposing method, obtaining superfine zirconium oxide powder. By adopting the method the sphere particle zirconium oxide superfine powder with small particle diameter and narrow particle size distribution can be obtained and applied on fine ceramic composing, catalyzer and other fields.

Description

technical field [0001] The invention discloses a method for preparing zirconia superfine powder by hydrolysis, which belongs to the field of inorganic chemical synthesis and new materials. Background technique [0002] Zirconia (ZrO 2 )-based ceramics are inorganic non-metallic materials with high temperature resistance, wear resistance and corrosion resistance. With the development of electronics and new material industries and the wide application of electronic ceramics, functional ceramics and structural ceramics in high-tech fields such as aviation, aerospace, machinery, chemicals, electronics, automobiles, and energy, ZrO as its raw material 2 The amount of powder is increasing. [0003] Zirconia (ZrO 2 )-based fine ceramic materials require the raw material powder to be uniform and ultra-fine (0.1-0.5 μm), therefore, the requirements for the preparation process of the powder are relatively high. At present, the preparation of such materials mostly adopts wet chemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/26
Inventor 刘文彬王军
Owner HARBIN ENG UNIV
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