文献类型：期刊文献

中文题名：SiO_2/α-FeOOH和SiO_2/γ-Fe_2O_3微粒的界面研究

英文题名：Study on the Interface of SiO_2/α-FeOOH and Sio_2/α-Fe_2O_3 Fine Particles

作者：朱以华[1];李春忠[1];胡黎明[1]

机构：[1]华东理工大学技术化学物理研究所,上海200237

年份：1995

卷号：11

期号：9

起止页码：860

中文期刊名：物理化学学报

外文期刊名：Acta Physico-Chimica Sinica

收录：CSTPCD;;Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000207590800020)】；北大核心:【北大核心1992】；CSCD:【CSCD2011_2012】；PubMed;

基金：国家教育委员会资助

语种：中文

中文关键词：微粒;氧化铁;氧化硅;界面结构;磁性能

外文关键词：Coating, Fine particle, Interface, Iron okide

摘要：The structures and chemical states of SiO2/α-FeOOH and SiO2/α-Fe2O3 Ane particles haye been investigated by the technologies of HREM, XPS and CELS. The results show that a crystalline interface layer between SiO2 coating and α-FeOOH nucleus is formed, and its chethecal composition is infered to be α-Fe2O3. In view of this, a mechanism of its formation is presented. The results also show that the coating of SiO2/α-Fe2O3 obtained from SiO2/α-FeOOH by a thermal treatment is converted from an amorphous to crystal, line one and its mechanism is discussed. In addtion, the effects of the coating on the structuxe of vacant state above Fermi level of α-FeOOH fine particles have also been studied.
The structures and chemical states of SiO2/α-FeOOH and SiO2/α-Fe2O3 Ane particles haye been investigated by the technologies of HREM, XPS and CELS. The results show that a crystalline interface layer between SiO2 coating and α-FeOOH nucleus is formed, and its chethecal composition is infered to be α-Fe2O3. In view of this, a mechanism of its formation is presented. The results also show that the coating of SiO2/α-Fe2O3 obtained from SiO2/α-FeOOH by a thermal treatment is converted from an amorphous to crystal, line one and its mechanism is discussed. In addtion, the effects of the coating on the structuxe of vacant state above Fermi level of α-FeOOH fine particles have also been studied.