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《Ordnance Material Science and Engineering》 2010-01
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Influences of La~(3+) substitution on magnetic properties of M-type strontium ferrites

GAO Huamin 1,LI Mingling 1,DENG Yuxin 2,QIU Shixing 2,ZHOU Dan 2 (1.Chemistry and Material Department of Chaohu College,Chaohu 238000,China;2.Engineering Technology Research Center of Magnetic Materials of Anhui Province,School of Physics & Materials Science,Anhui University,Hefei 230039,China)  
Influences of the substituted amount of La 3+ on structure and magnetic properties of Sr 1-x La x Fe12O19 prepared by sol-gel method have been investigated by XRD,VSM and TEM.It is found that the suitable amount of La3+ substitution may remarkably increase saturation magnetization σs and intrinsic coercivity H cj.Optimum magnetic properties of σs=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.
【CateGory Index】: TM277
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