应用化学
應用化學
응용화학
CHINESE JOURNAL OF APPLIED CHEMISTRY
2010年
1期
78-81
,共4页
铁酸钴%低温合成%红外光谱%拉曼光谱%磁性
鐵痠鈷%低溫閤成%紅外光譜%拉曼光譜%磁性
철산고%저온합성%홍외광보%랍만광보%자성
CoFe_2O_4%low-temperature synthesis%infrared spectroscopy%Raman spectroscopy%magnetic property
以十六烷基三甲基溴化铵(CTAB)为模板,Fe(NO_3)_3·9H_2O和Co(NO_3)_2·6H_2O为原料,NaOH为沉淀剂,低温回流合成了磁性铁酸钴纳米晶. 利用X射线衍射、透射电子显微镜、红外光谱、拉曼光谱等测试技术对产品的结构进行了表征,借助振动样品磁强计测定了样品的室温磁性能. 结果表明,铁酸钴纳米晶为单相立方尖晶石结构,纳米晶的平均粒径为15～20 nm. 铁酸钴纳米晶在室温外加磁场下表现出明显的磁滞现象,饱和比磁化强度M_S=36.5 A·m~2/kg,矫顽力HC=5.89×104 A/m.
以十六烷基三甲基溴化銨(CTAB)為模闆,Fe(NO_3)_3·9H_2O和Co(NO_3)_2·6H_2O為原料,NaOH為沉澱劑,低溫迴流閤成瞭磁性鐵痠鈷納米晶. 利用X射線衍射、透射電子顯微鏡、紅外光譜、拉曼光譜等測試技術對產品的結構進行瞭錶徵,藉助振動樣品磁彊計測定瞭樣品的室溫磁性能. 結果錶明,鐵痠鈷納米晶為單相立方尖晶石結構,納米晶的平均粒徑為15～20 nm. 鐵痠鈷納米晶在室溫外加磁場下錶現齣明顯的磁滯現象,飽和比磁化彊度M_S=36.5 A·m~2/kg,矯頑力HC=5.89×104 A/m.
이십륙완기삼갑기추화안(CTAB)위모판,Fe(NO_3)_3·9H_2O화Co(NO_3)_2·6H_2O위원료,NaOH위침정제,저온회류합성료자성철산고납미정. 이용X사선연사、투사전자현미경、홍외광보、랍만광보등측시기술대산품적결구진행료표정,차조진동양품자강계측정료양품적실온자성능. 결과표명,철산고납미정위단상립방첨정석결구,납미정적평균립경위15～20 nm. 철산고납미정재실온외가자장하표현출명현적자체현상,포화비자화강도M_S=36.5 A·m~2/kg,교완력HC=5.89×104 A/m.
CoFe_2O_4 nanocrystals were prepared by means of a low temperature refluxing method with CTAB as templet, Fe(NO_3)_3·9H_2O and Co(NO_3)2·6H_2O as precursors, NaOH as precipitator. The as-prepared products were characterized by X-ray diffraction, transmission electron microscopy, infrared and Raman spectroscopies. The room temperature magnetic properties were determined by means of vibrating sample magnetometer. The results show that CoFe_2O_4 has a single-phase spinel structure. The average particle size was in a range of 15～20 nm. CoFe_2O_4 exhibited a clearly magnetic hysteretic behavior under applied magnetic field at room temperature. The values of variation of saturation magnetization(Ms) and coercivity(HC) were 36.5 A·m~2/kg and 5.89×10~4 A/m, respectively.
