中文摘要：

利用微波辅助溶胶－凝胶法合成了M型SrFe12O19纳米晶铁氧体。借助XRD、SEM和VSM等技术，对合成纳米晶的物相、微观结构及其磁性能进行了研究。结果表明，当煅烧温度为900℃以上时，M型SrFe12O19微粒保持为单一的六方磁铅石型结构；温度在1100℃时，得到平均晶粒100～150nm的六角型锶铁氧体；温度为800℃时，其矫顽力达到最大为HC=399．78kA／m，比饱和磁化强度为σs=57．97A·m^2·kg^-1。

英文摘要：

Nano-crystalline of M-type Sr-ferrites SrFe12019 were fabricated by microwave-assisted sol-gel technique. The phase, microstructure and magnetic properties of the as-synthesized samples were characterized by X-ray diffraction （XRD）, filed-emission scanning electronic microscope（FESEM） and vibrating sample magnetometer（VSM）. The results show that the M-type SrFe12O19 keeps a single hexagonal magnetoplumbite structure above 900℃; the average size of the as-synthesized sample was about 100-150 nm at 1100 ℃; the maximum coercivity （He） was gained at 800 ℃, which was 399.78 kA/m, and the saturation magnetization value （as） was 57.97 A·m^2·kg^-1.