Preparation method of high-purity nano zirconium dioxide

A nano-zirconium dioxide and zirconium dioxide technology, applied in the direction of zirconia, nano-structure manufacturing, nano-technology, etc., can solve the problems of difficult industrial production, expensive production equipment, harsh process conditions, etc., and achieve easy control and dry processing capacity Larger, less reaction time effects

CN101830506AInactive Publication Date: 2010-09-15WEIFANG TIANFU CHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2010-09-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of high-purity nano zirconium dioxide, which comprises the following steps: firstly, preparing zirconium oxychloride by using zirconite as a raw material, then preparing 0.3 to 0.5 mol / L zirconium oxychloride solution, adding 25wt% to 30wt% of NH4OH into the zirconium oxychloride solution while stirring until the pH is in the range of 9 to 9.5, precipitating after stirring uniformly, and finally obtaining the high-purity nano zirconium dioxide by the processes of washing and filtering, dehydrating wit alcohol, drying, ball milling and roasting. The preparation method uses a liquid phase precipitation method to prepare nano zirconium dioxide powder. The invention solves the problem of nano zirconium dioxide aggregation, improves surface activation grade, has the advantages of large drying treatment capacity, high safety, convenient control, low aggregation of produced powder, small granularity of powder obtained after surface treatment, uniform distribution, regular appearance, and dry and loose prepared zirconium dioxide powder, and can be widely applied to the aspects of catalysis, filtering, photoabsorption, medicine, magnetic medium, structural ceramics, new materials and the like.
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Description

technical field

[0001] The invention relates to a preparation method of zirconium dioxide, in particular to a preparation method of high-purity nano-scale zirconium dioxide. Background technique

[0002] The current nano-zirconium dioxide (ZrO 2 ) Due to the small particle size, large surface area, and large proportion of surface atoms to the total number of atoms, it has the characteristics of quantum effects, small size effects, surface effects, and macroscopic quantum tunneling effects, which make it derive from traditional solids that do not have Many special properties make it have broad application prospects in catalysis, light filtering, light adsorption, medicine, magnetic media, structural ceramics and new materials. The production of zirconium dioxide has a long history, and there are many preparation methods up to now, but the particle size distribution of the zirconium dioxide powder produced by the current preparation method is wide and high, and there are also...

Examples

Embodiment 1

[0025] Such as figure 1 with figure 2 Shown, the preparation method of high-purity nano zirconium dioxide comprises:

[0026] 1. The preparation of zirconium oxychloride comprises steps:

[0027] Sintering, heating sodium hydroxide flake alkali with a content of 99wt% to 750°C in a sintering pot, adding 80-mesh zircon into the sodium hydroxide solution at a mass ratio of 1:1.3, and cooling the sintering after the materials have completely reacted material, after the reaction, the Si conversion rate is greater than 99.5%;

[0028] Washing with water, the sintered material and water are washed according to the mass ratio of 1:8, three-stage reverse water washing is adopted, the temperature of the washing liquid is 80°C, and the washing is for 1.5 hours, and the washing liquid of each washing is removed by a strong magnetic separator to remove iron and other impurities. It is then used for the next level of washing, the removal of silicon can reach 99wt%, the removal rate of ...

Embodiment 2

[0042] Such as figure 1 with figure 2 Shown, the preparation method of high-purity nano zirconium dioxide comprises:

[0043] 1. The preparation of zirconium oxychloride comprises steps:

[0044] For sintering, heat sodium hydroxide flake alkali with a content of 99wt% to 700°C in a sintering pot, add 80-mesh zircon into the sodium hydroxide solution at a mass ratio of 1:1.5, and cool the materials to obtain sintering after the reaction is complete. material, after the reaction, the Si conversion rate is greater than 99.5%;

[0045] Water washing, the sintered material and water are washed according to the mass ratio of 1:7, three-stage reverse water washing is adopted, the temperature of the washing liquid is 90°C, and the washing is performed for 1 hour, and the washing liquid of each washing is removed by a strong magnetic separator to remove iron and other impurities. It is then used for the next level of washing, the removal of silicon can reach 99wt%, the removal rat...