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Production of superfine mono-dispered nano-zirconium dioxide

A zirconium dioxide and preparation process technology, applied in zirconia and other directions, can solve the problems of large particles, low purity and poor dispersibility

Active Publication Date: 2007-11-21
仙桃市中星电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention mainly solves the technical problems of low purity, poor dispersibility, large particles and wide particle size distribution existing in the production of existing zirconia ultrafine powders.

Method used

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  • Production of superfine mono-dispered nano-zirconium dioxide
  • Production of superfine mono-dispered nano-zirconium dioxide
  • Production of superfine mono-dispered nano-zirconium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: take by weighing zirconium oxychloride 120g and dissolve in deionized water, be mixed with 0.3mol / L zirconium oxychloride solution for subsequent use; Pass 40g liquid ammonia into 960ml deionized water, be mixed with the ammoniacal liquor that concentration is 4%, then add to Add 1.3g of additive to the ammonia water, the additive is a mixture of polyacrylic acid amide and polyethylene glycol mixed in a ratio of 1:1.5, after stirring evenly, slowly add the zirconium oxychloride solution into the ammonia water to react, continue stirring, and control The reaction temperature is 35°C. When the pH value of the reaction solution is detected to be 9, the feeding is stopped immediately, and the obtained zirconium hydroxide hydrosol is sent to a filter press and washed with water. When the chloride ion content in the washing water is less than 120ppm At the same time, take out the zirconium hydroxide filter cake and put it into the alcohol liquid tank and wash it ...

Embodiment 2

[0020] Embodiment 2: take by weighing 170g of zirconium oxychloride and dissolve in deionized water, and prepare a 0.2mol / L zirconium oxychloride solution for subsequent use; pass into 950ml deionized water in 50g of liquid ammonia, and be mixed with the ammoniacal liquor that concentration is 5%, then Add 1.0 additive to the ammonia water, the additive is a mixture of polyacrylic acid amide and polyethylene glycol mixed in a ratio of 1:2, after stirring evenly, slowly add the zirconium oxychloride solution to the ammonia water for reaction, continue stirring, and control The reaction temperature is 30°C. When the pH value of the reaction solution is detected to be 9, the feeding is stopped immediately, and the obtained zirconium hydroxide hydrosol is sent to a filter press and washed with water. When the chloride ion content in the washing water is less than 120ppm At the same time, take out the zirconium hydroxide filter cake and put it into the alcohol liquid tank and wash i...

Embodiment 3

[0021] Embodiment 3: take by weighing zirconium oxychloride 170g and dissolve in deionized water, be mixed with 0.4mol / L zirconium oxychloride solution for subsequent use; Pass 60g liquid ammonia into 940ml deionized water, be mixed with the ammoniacal liquor that concentration is 6%, then add to Add 1.5g of additive to the ammonia water, the additive is a mixture of polyacrylic acid amide and polyethylene glycol mixed in a ratio of 1:1.8, after stirring evenly, slowly add the zirconium oxychloride solution into the ammonia water to react, continue stirring, and control The reaction temperature is 27°C. When the pH value of the reaction solution is detected to be 9, the feeding is stopped immediately, and the obtained zirconium hydroxide hydrosol is sent to a filter press and washed with water. When the chloride ion content in the washing water is less than 120ppm At the same time, take out the zirconium hydroxide filter cake and put it into the alcohol liquid tank and wash it ...

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Abstract

Process of mono-dispersing nano-superfine zirconium anhydride is carried out by dissolving zirconium oxychloride into de-ionized water, adding into zirconium oxychloride solution into ammonia water slowly while agitating to obtain zirconium hydroxide hydrosol, transferring it to filter press, adding into water, washing to obtain zirconium hydroxide powder, putting it into kiln, burning for 4-5 hrs, and crushing by air flow to obtain final product. The mono-crystal granular diameter is 60-100 nm. It has excellent purity, activity and mono-dispersion.

Description

technical field [0001] The invention relates to a preparation method of zirconia, in particular to a preparation process of monodisperse nano-scale ultrafine zirconia. Background technique [0002] High-quality nano-scale ultrafine zirconia powder generally has the characteristics of good dispersion and concentrated particle size distribution. It is one of the main materials for modern high-tech conductive ceramics, functional ceramics, high-performance refractory materials for modern metallurgy, and high-performance catalysts. The production of traditional nano-scale ultrafine zirconia powder generally adopts gas-phase method, liquid-phase method, solid-phase method and other preparation methods; among them, the liquid-phase method is currently widely used in laboratories and industrial production. However, when the conventional liquid phase method is used to prepare zirconia, the surface of the gel particles is easy to absorb water and residual Cl. - , OH - ions to form ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/02
Inventor 赵中友黄敏杨锋林贡王敏
Owner 仙桃市中星电子材料有限公司
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