摘要
应用经过改进的实验方法制得均匀球状Fe_3O_4胶体粒子,通过对多种Fe_3O_4粒子的Mossbauer测量并结合化学分析,我们发现,在制备过程中,反应浓度、加液次序以及陈化时间的不同,对所生成的Fe_3O_4晶体的基本骨架与结构影响极小,而随着陈化时间的不断增加,Fe_3O_4粒子的组成将逐渐接近化学计量.以这些实验结果及文献报道为基础,本文讨论了均匀Fe_3O_4胶体粒子的形成机理.
Using a modified experimental procedure, samples of uniform spherical magnetite particles had been prepared. Through the Mossbauer spectrum determination and chemical analyses of various samples of uniform magnetite particles, we found that with the increase of aging time the uniform magnetite particles with stoichiometeic composition was obtained. The mechanism of formation (?)f uniform magnetite particles was discussed.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1991年第6期529-534,共6页
Acta Chimica Sinica
基金
国家自然科学基金资助的课题
