PREPARATION AND CHARACTERIZATION OF MAGNESIUM CHROMITE AND MAGNESIUMh61主板支持什么cpu
网站建设案例FERRITE AEROGELS
期刊名称： Chemical Engineering Communications炖青鱼
作者： Willey, Ronald J.,Noirclerc, Patrick,Busca, Guido
妹妹的奶水年份： 2012年
期号： 第1期
麦克勒姆关键词： Aerogels;Sol-Gel;Binary;Oxides;Ferrites;Chromites;Fine;Particle;Powders
摘要：A supercritical drying process has been ud to prepare MgO-Cr2O3, and MgO-Fe2O3 powders from a mixture of magnesium acetate and the metallic acetylacetonates hydrolyzed in a methanolic solvent. The resultant aerogels have small particle sizes in the range of 10 to 20 nm and high surface areas in the range of 50 to 250 m2sol;g. After removal from the autoclave, characterization by X-ray diff上下一体打一字
raction (XRD) showed that the MgO-Cr2O3, was amorphous and that the MgO-Fe2O3 was readily in the form of a spinel structure for magnesioferrite (MgFe2O4). Fourier transform infrared spectroscopy (FTIR) and thermogravimetric and differential Ihermal analys (TG-DTG-DTA) showed a high level of retained surface methoxy and carboxylate species for the MgO-Cr2O3 aerogel (lover 40% by weight). The MgO-Fe2O4, on the otherhand, had less than 10%
属牛的和属虎的相配吗
内容由中国教育图书进出口有限公司引进南华山
