MICROPARTICULE D'OXYDE DE CÉRIUM DE TYPE NOYAU-COQUILLE, SOLUTION DE DISPERSION COMPRENANT LA MICROPARTICULE ET PROCÉDÉ DE PRODUCTION DE LA MICROPARTICULE OU DE LA SOLUTION DE DISPERSION
National Institute of Advanced Industrial Science and Technology
发明人:
申请号：
EP07829446.9
公开号：
EP2072466B1
申请日:
2007.10.09
申请国别(地区):
EP
年份:
2017
代理人:
摘要：
An object of the present invention is to provide a core-shell-type cerium oxide microparticle, a dispersion solution comprising the microparticle, and a process for production of the microparticle or dispersion solution, and to achieve the object, the present invention provides a core-shell-type cerium oxide microparticle which has an average particle diameter of 30 to 200 nm and a coefficient of variation therein no greater than 0.25, and in which the secondary particle forming the core portion is spherical in shape and a polymer is attached to its surface, a dispersion solution of this cerium oxide microparticle and a dry powder from the cerium oxide microparticle dispersion solution, and a process of producing a core-shell-type cerium oxide microparticle or a dispersion solution thereof, which comprises the steps of: mixing a cerium salt and a polymer in an organic solvent to obtain a mixture； and heating this mixture under reflux at a prescribed temperature to precipitate core-shell-type cerium oxide microparticles, wherein the cerium salt is cerium nitrate and the particle diameter of the microparticles is adjusted using the molecular weight of the polymer.
