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Alcohol-water co-precipiting and low temperature treating process for preparing superfine zirconia powder

An ultra-fine powder, zirconia technology, applied in zirconia and other directions, can solve the problems of complex equipment requirements, high cost, difficult to mass production, etc., to avoid agglomeration and improve efficiency.

Inactive Publication Date: 2007-06-27
KUNMING INST OF PRECIOUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are costly, require complex equipment, and are difficult to produce on a large scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1: Weighing ZrOCl 2 ·8H 2 Add absolute ethanol to the O crystal according to the alcohol-water ratio of 4:1, add deionized water after fully stirring, and prepare a 1mol / L solution; dissolve the prepared YCl with hydrochloric acid 3 The solution is added ZrOCl according to the content of 3% mol 2 In the solution, add an appropriate amount of polyethylene glycol as a dispersant; under the condition of sufficient stirring, slowly add ammonia water, and measure its pH value intermittently until the pH value reaches 9, then fully stir for 30 minutes; Aging treatment is carried out in the solution, and the treatment time is divided into 24h; after aging, the precipitate is washed to 0.1mol / LAgNO 3 Can not detect Cl - put the filter cake in a refrigerator at -20°C, and freeze it for 48 hours; take it out and add absolute ethanol to thaw it at room temperature, filter and wash after thawing; dry it in a constant temperature oven at 80°C, and calcine it at 600°C ...

Embodiment 2

[0009] Embodiment 2: weighing ZrOCl 2 ·8H 2 Add absolute ethanol to the O crystal according to the alcohol-water ratio of 2:1, add deionized water after fully stirring, and prepare a 0.5mol / L solution; dissolve the prepared MgCl with hydrochloric acid 2 The solution is added ZrOCl according to the required content 2 In the solution, under the condition of full stirring, add ammonia water slowly, measure its pH value intermittently, until the pH value reaches 11, then aging the precipitate in the original solution for 48 hours; after aging, wash the precipitate to 0.1 mol / LAgNO 3 Can not detect Cl - Put the filter cake in a refrigerator at -20°C and freeze it for 48 hours; take it out and add absolute ethanol to thaw it at room temperature, filter and wash after thawing; dry it in a constant temperature oven at 80°C, and calcine it at 800°C After 2 hours, carry out ball milling in absolute ethanol for 8 hours and then dry to prepare zirconia superfine powder.

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Abstract

The present invention discloses alcohol-water co-precipitating and low temperature treating process for preparing superfine zirconia powder. Based on the zirconia aggregation forming mechanism, anhydrous alcohol is introduced into the superfine zirconia powder preparing process with zirconium oxychloride as material in advance to reduce the formation of constitution water and adsorption water during co-precipitation, and low temperature treatment is adopted before drying to reduce the formation of aggregation. The process of the present invention can prepare nanometer zirconia powder of particle size 10-20 nm, is simple and has relatively low cost.

Description

Technical field: [0001] The invention relates to a low-cost and easy-to-industrialize preparation method of zirconia nanometer powder, which belongs to the field of inorganic non-metallic powder materials. Background technique: [0002] Zirconia is an inorganic non-metallic material with high melting point (2700°C), high boiling point, large thermal expansion coefficient, small thermal conductivity that hardly changes with temperature, good wear resistance, good chemical stability, and excellent corrosion resistance. It has been widely used in the manufacture of high-tech products such as structural ceramics, functional ceramics, piezoelectric ceramics, electronic ceramics, bioceramics, high-temperature optical components, magnetic fluid generators, fuel cells, etc., and the preparation particle size is in the nanometer range, the distribution is narrow, the composition is uniform, Nano zirconia powder with high purity and regular shape is the basis for preparing nano zircon...

Claims

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Application Information

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IPC IPC(8): C01G25/02
Inventor 王开军胡劲刘建良万吉高
Owner KUNMING INST OF PRECIOUS METALS
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