摘要
利用阴离子交换膜为隔膜将电解槽分为两室,控制阴极室电极的恒定的电流密度,在电解过程中释放H2的同时恒速释放的OH-或消耗H+,与CeCl3的盐溶液进行均匀沉淀反应或氧化水解沉淀,经高温焙烧后,TEM和XRD测试表明:所得CeO2为立方晶系,粒子呈球形,晶体粒径约为60~80 nm。对其形成机制进行了初步的探讨研究。
The anion-exchange membrane as diaphragm can compartmentalize the electrolyser into the negative cell and the positive cell.Under the electrolyzing process with constant current density on the negative electrode,hydroxide ions produced or consuming hydrogen ions in the meantime of hydrogen given off by electrolyzing,react to cerium(Ⅲ) in the cerium chloride solution or promote hydrolyzing the oxidizing process to result in uniform precipitation.Under the calcination condition of high temperature,the size and structure of ceria analyzed by means of TEM and SEM show that ultrafine ceria is cubic crystal group in structure and spherical in shape with the size of average particles ranging from sixty to eighty nanometer.The productive theory of forming ultrafine powder was elementarily investigated in this paper.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2005年第S2期58-61,共4页
Journal of the Chinese Society of Rare Earths
关键词
电解法
二氧化铈
超微粉体
稀土
electrolytic method
ceria
ultrafine powder
rare earths
