兵器材料科学与工程
兵器材料科學與工程
병기재료과학여공정
Ordnance Material Science and Engineering
2010年
1期
73-75
,共3页
高华敏%李明玲%邓玉新%邱士星%周丹
高華敏%李明玲%鄧玉新%邱士星%週丹
고화민%리명령%산옥신%구사성%주단
溶胶-凝胶法%M型铁氧体%La~(3+)取代%磁性能
溶膠-凝膠法%M型鐵氧體%La~(3+)取代%磁性能
용효-응효법%M형철양체%La~(3+)취대%자성능
sol-gel method%M-type strontium ferrite%La~(3+) substitution%magnetic properties
溶胶-凝胶法制备的Sr_(1-x)La_(x)Fe_(12)O_(19)样品,用XRD、VSM和TEM研究了La~(3+)取代量对样品结构和磁性能的影响.实验发现,合适的La~(3+)取代量能很明显提升样品的比饱和磁化强度和内禀矫顽力,在取代量x=0.15,于850℃空气中热处理时得到理想的磁性能σ_s=74.1 Am~2/kg,H_(cj)=498.4 kA/m.
溶膠-凝膠法製備的Sr_(1-x)La_(x)Fe_(12)O_(19)樣品,用XRD、VSM和TEM研究瞭La~(3+)取代量對樣品結構和磁性能的影響.實驗髮現,閤適的La~(3+)取代量能很明顯提升樣品的比飽和磁化彊度和內稟矯頑力,在取代量x=0.15,于850℃空氣中熱處理時得到理想的磁性能σ_s=74.1 Am~2/kg,H_(cj)=498.4 kA/m.
용효-응효법제비적Sr_(1-x)La_(x)Fe_(12)O_(19)양품,용XRD、VSM화TEM연구료La~(3+)취대량대양품결구화자성능적영향.실험발현,합괄적La~(3+)취대량능흔명현제승양품적비포화자화강도화내품교완력,재취대량x=0.15,우850℃공기중열처리시득도이상적자성능σ_s=74.1 Am~2/kg,H_(cj)=498.4 kA/m.
Influences of the substituted amount of La~(3+) on structure and magnetic properties of Sr_(1-x)La_(x)Fe_(12)O_(19) prepared by sol-gel method have been investigated by XRD, VSM and TEM. It is found that the suitable amount of La~(3+) substitution may remarkably increase saturation magnetization σ_s and intrinsic coercivity H_(cj). Optimum magnetic properties of σ_s = 74.1 Am~2/kg, H_(cj)= 498.4 kA/m are achieved with material of composition Sr_(0.85)La_(0.15)Fe1_(1.85)O_(19) heated at 850 ℃ in air.
