%0 Journal Article
%T One-step Synthesis of Barium Hexaferrite Nanocrystals via Microwave-assisted Sol-Gel auto-Combustion and their Magnetic Properties<br>微波辅助溶胶凝胶自燃烧一步合成六角铁酸钡纳米晶及其磁性能
%A LIU Jun-Liang
%A GUO Cui-Jing
%A ZHANG Wei
%A JI Rong-Jin
%A ZENG Yan-Wei
%A <br>刘俊亮
%A 郭翠静
%A 张伟
%A 纪荣进
%A 曾燕伟
%J 无机材料学报
%D 2009
%I Science Press
%X Single phase barium hexaferrite nanocrystals were innovatively one-step synthesized via a microwave-assisted sol-gel auto-combustion method using citric acid and ethylene diamine tetraacetic acid as composite chelating agents, and freeze-drying technique was used to remove sols' moisture that effectively improve the spatial distribution homogeneity of metal ions and oxidant in the gels. The obtained barium hexaferrite nanocrystals is characterized by fluffy particle aggregates with the diameter ranging from 50nm to 100nm. The nanocrystals contain single magnetic domains with a low coercive field of 20.7kA/m and a high saturation magnetization of 338.5kA/m. The analysis shows that keeping rich oxidant in the auto-combustion process can prohibit the reduction of iron ions by the organic fragment from the decomposition of fuels and promote the phase formation of barium hexaferrite.
%K barium hexaferrite
%K microwave-assistance
%K sol-gel auto-combustion
%K one-step synthesis<br>六角铁酸钡
%K 微波辅助
%K 溶胶凝胶自燃烧
%K 一步合成
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=ABC0063016AF57E1C73EF43C8D2212BD&aid=692044449C67C1DE2091578F9E0E682F&yid=DE12191FBD62783C&vid=B91E8C6D6FE990DB&iid=B31275AF3241DB2D&sid=8339CA1DD1F3C6AB&eid=D7FC8AF637611368&journal_id=1000-324X&journal_name=无机材料学报&referenced_num=1&reference_num=15