Preparation method of large-granule cerous oxalate precursor

Abstract

The invention discloses a preparation method of a large-granule cerous oxalate precursor, which comprises the following steps: preparing a cerous carbonate solution with the Ce(NO3)3 concentration of 0.02 mol / L; preparing a precipitant oxalic acid solution with the H2C2O4.2H2O concentration of 0.15 mol / L; in the nucleation stage, adding the cerous carbonate solution into a nucleation device, and dropwisely adding the oxalic acid solution into the nucleation device while continuously stirring, wherein the dropwise addition rate is 10ml / minute, and the reaction temperature is 298K; meanwhile, starting a stirring paddle in an electric heating reaction kettle, wherein the stirring rate is 200 rpm, and the reaction time is 15.97 minutes; and filtering the granules generated in the solution, and drying to obtain the cerous oxalate large-granule precursor. The method has favorable effects on nucleation rate and growth rate in the rare-earth cerium oxide precursor cerous oxalate preparation process, and can be used for preparing the large-granule precursor cerous oxalate.

Description

technical field [0001] The invention belongs to the technical field of chemical materials, and relates to a preparation method of a large particle cerium oxalate precursor. Background technique [0002] The widespread application of rare earth oxides in fine ceramic materials is only nearly 20 years old. A large number of domestic and foreign researchers of ceramic materials have proved that the addition of rare earth oxides as stabilizers and sintering aids to different fine ceramic materials can greatly improve and improve the technical indicators such as strength and toughness of certain structural ceramic materials. Reduce its reaction sintering temperature, thereby reducing production costs; at the same time, rare earth oxides also play a very important role in functional ceramic materials such as semiconductor gas sensor materials, microwave dielectric materials, and piezoelectric ceramic materials. [0003] The three fields with the fastest growth in rare earth appli...

AI Technical Summary

Problems solved by technology

Solve the problem that the current preparation of rare earth cerium oxide precursor cerium oxalate has unsatisfactory nucleation rate and growth rate, and the prepared precursor cerium oxalate particles are too small

Images