Effect of Magnetic Field on synthesis of nano-FeOOH by Low-temperature Neutralization Method

摘要：

　　Using XRD,TEM and VSM methods,the phase,morphology and magnetic property of iron hydroxide oxide(FeOOH)which has been prepared by low-temperature neutralization reaction under different magnetic fields were analyzed.It can be found that the magnetic field had a great influence on the product.Acicular goethite(α-FeOOH)was synthetized without magnetic field.When the magnetic flux density was increased to 0.1T,γ-FeOOH was obtained.If the magnetic field intensity was raised to 0.5T,the product was all composed of δ-FeOOH.Moreover,the crystallization of FeOOH was greatly influenced by magnetic field as well.Thermodynamic calculation results show that the magnetic free energy of chemical reaction reached to more than hundreds KJ/mol when the magnetic field is applied.It meaned that the application of magnetic field was conducived to producing the products with higher susceptibility.Even under the low magnetic field,due to the stability of the reaction products was broken by the magnetic field,the magnetic free energy was also effective.

关键词： Magnetic field FeOOH Magnetic free energy Low-temperature neutralization method chemical reaction

作者: ZHONG Yun-bo SUN Zong-qian TANG Nie-wei XU Bin FU Xiao-ming WANG Jiang

作者单位: Shanghai Key Laboratory of Modern Metallurgy and Material Processing,Shanghai University,200072 Shanghai,China

会议类型: 国际会议

会议名称: The 7th International Conference on Electromagnetic Processing of Materials(第七届冶金与材料电磁过程国际大会)

会议地点: 北京

会议语种:英文

页码: 1-8

在线出版日期: 2012-10-22（万方平台首次上网日期，不代表论文的发表时间）