【摘要】 利用柠檬酸法合成ＳｒＦｅ１２Ｏ１９超微粉末，用Ｘ射线衍射（ＸＲＤ）、透射电子显微镜（ＴＥＭ）、振动样品磁强计（ＶＳＭ）和Ｍｏｓｂａｕｅｒ谱等技术对粉末的结构、粒径和形貌、性能等进行了观察和测试。结果表明：合成的ＳｒＦｅ１２Ｏ１９铁氧体超微粉末具有较小的粒径和较高的磁学性能。其粒径约为５０ｎｍ，ｊＨｃ为４５２．１３ｋＡ／ｍ，σｓ为６１．５４ｅｍｕ／ｇ，σｒ为３４．９３ｅｍｕ／ｇ。更多还原

【Abstract】 SrFe 12 O 19 ultrafine powder was synthesized by the citrate method. By means of X ray diffraction (XRD), transition electronic microscopy(TEM), vibrating sample magnetometer (VSM) and Mssbauer spectrum techniques et al,their structure, size and magnetic properties of the powder were measured. The results show that this kind of powder has better magnetic properties and finer size, i.e., j H c= 452 13 kA/m (5680 Oe), σ s= 61 54 emu/g and σ r= 34 93 emu/g, and its size is about 50 nm.更多还原