材料导报
材料導報
재료도보
MATERIALS REVIEW
2012年
10期
42-45
,共4页
张贤%马永青%吴丹丹%马倩%昝芬莲%郑赣鸿%吴明在%李广
張賢%馬永青%吳丹丹%馬倩%昝芬蓮%鄭贛鴻%吳明在%李廣
장현%마영청%오단단%마천%잠분련%정공홍%오명재%리엄
M型锶铁氧体%共沉淀法%纳米颗粒%磁性能
M型鍶鐵氧體%共沉澱法%納米顆粒%磁性能
M형송철양체%공침정법%납미과립%자성능
M-type Sr ferrite%co-precipitation%nanoparticle%magnetic property
采用共沉淀法按照n(Fe)∶n(Sr)=10∶1合成M型锶铁氧体.通过把样品在不同的温度下退火,研究了退火温度对晶体结构、形貌和磁性能的影响.所制备的样品用FTIR、XRD、SEM和VSM进行表征.结果表明,当退火温度为1000℃时样品颗粒分布规则且比饱和磁化强度达最大值,为77.87emu/g.当退火温度为1100℃时样品颗粒变成球形且矫顽力最小,为1601Oe.此外,通过控制退火温度可使矫顽力在1601～4591Oe范围内变化.
採用共沉澱法按照n(Fe)∶n(Sr)=10∶1閤成M型鍶鐵氧體.通過把樣品在不同的溫度下退火,研究瞭退火溫度對晶體結構、形貌和磁性能的影響.所製備的樣品用FTIR、XRD、SEM和VSM進行錶徵.結果錶明,噹退火溫度為1000℃時樣品顆粒分佈規則且比飽和磁化彊度達最大值,為77.87emu/g.噹退火溫度為1100℃時樣品顆粒變成毬形且矯頑力最小,為1601Oe.此外,通過控製退火溫度可使矯頑力在1601～4591Oe範圍內變化.
채용공침정법안조n(Fe)∶n(Sr)=10∶1합성M형송철양체.통과파양품재불동적온도하퇴화,연구료퇴화온도대정체결구、형모화자성능적영향.소제비적양품용FTIR、XRD、SEM화VSM진행표정.결과표명,당퇴화온도위1000℃시양품과립분포규칙차비포화자화강도체최대치,위77.87emu/g.당퇴화온도위1100℃시양품과립변성구형차교완력최소,위1601Oe.차외,통과공제퇴화온도가사교완력재1601～4591Oe범위내변화.
M-type Sr-ferrite powder with Fea+ to Sr2+ of 10 ∶ 1 mole ratio was synthesized by the chemical coprecipitation-calcination route.The samples were sintered at different temperatures from 800℃ to 1100℃ in order to investigate the effects of sintering temperature on the crystal structure,grain size,morphology and magnetic proper ties.The powders were characterized by infrared spectra,powder X-rays diffraction,scanning electron microscopy and vibrating sample magnetometer.Powders sintered at 1000℃ show the best homogeneity in terms of size and morphology,and possess the highest saturation magnetization of 77.87emu/g.Powders sintered at 1100℃ have a spherical shape and show the lowest coercivity of 1601Oe.The results also show that a wide range of coercivity varying from 1601Oe to 4591Oe could be obtained by selecting the appropriate calcination temperature.
