Preparation process of nanoscale zirconia powder

Abstract

The invention discloses a preparation process of nanoscale zirconium oxide powder. The preparation process comprises the following steps: preparing a precipitator solution, a zirconium salt solution and a mother solution; heating the mother liquor to a first temperature; the precipitant solution and the zirconium salt solution are added into the mother solution at the same time, stirring is conducted in the adding process, the flow speed of the zirconium salt solution is v1 m < 3 > / h in the adding process, and the flow speed of the precipitant solution is v2 m < 3 > / h; continuously stirring at constant temperature after adding; then filtering, washing and drying; and drying and calcining to obtain the catalyst. The concentration of zirconium ions in the zirconium salt solution is a mol / L, and a is 0.5-2.5; the mother liquor comprises ammonium ions and / or ammonia water, the concentration sum of the ammonium ions and the ammonia water in the mother liquor is bmol / L, and b is 0.2-2; the nano zirconium oxide prepared by a liquid phase method is small in particle size and uniform in particle size distribution, and the particle size is 33-48nm.

Description

technical field [0001] The invention relates to a preparation process of nano-scale zirconia powder, and belongs to the field of preparation of zirconia powder. Background technique [0002] Nano zirconia powder has the characteristics of large specific surface area, high surface energy, low sintering temperature, etc., and has excellent mechanical, thermal, electrical and optical properties, so it is widely used in high-temperature structural materials, high-temperature optical components, oxygen-sensitive components, fuel cells, etc. has a wide range of applications. [0003] The preparation methods of zirconia ultrafine powder are wet chemical method, hydrothermal method, sol-gel method, etc. The main method for preparing nano zirconia powder is liquid phase method, the liquid phase method has a simple process route and small equipment investment. However, in the preparation process of the liquid phase method, agglomeration is likely to occur, the particle size of the ob...

AI Technical Summary

Problems solved by technology

[0003] The preparation methods of zirconia ultrafine powder are wet chemical method, hydrothermal method, sol-gel method, etc. The main method of preparing nano zirconia powder is liquid phase method. The preparation process of liquid phase method is simple and the equipment investment is small. However, during the preparation process by the liquid phase method, agglomeration is prone to occur, the particle size of the obtained nano-zirconia powder is too large, and the content of ion impurities in the nano-zirconia powder is not easy to reduce