A solvent thermal method which depends on a thermal process under critical temperature and pressure was used to prepare cobalt iron oxide magnetic nanoparticles with a molar ratio 2. The prepared particles were in the form of nanoparticles with diameter ranging from 5 to 10 nm and with amorphous structure. Magnetic hysteresis behavior with saturation magnetization 36.31 emu/g and coercivity 4 Oe were observed for the nanoparticles. Polyvinyl alcohol was loaded with different concentrations of cobalt iron oxide nanoparticles using casting technique. Hysteresis loops for the polymer films were observed and both the saturation magnetization and coercivity were increased from 0.36 to 16.03 emu/g and 115 to 293 Oe for samples containing 5 and 20 wt% of nanoparticles, respectively. The elastic modulus of films was increased from 2.7 to 4.9 GPa for unloaded and loaded samples with 20 wt%, respectively. The storage modulus of the polymer films was found to obey the percolation behavior.

使用取决于临界温度和压力下的热处理的溶剂热法来制备摩尔比为2的钴铁氧化物磁性纳米颗粒。所制备的颗粒为直径为5至10nm的无定形的纳米颗粒形式。结构体。对于纳米粒子，观察到具有饱和磁化强度36.31 emu / g和矫顽力4 Oe的磁滞行为。使用浇铸技术将不同浓度的氧化铁钴纳米粒子装载到聚乙烯醇中。观察到聚合物膜的磁滞回线，并且对于包含5重量％和20重量％的纳米粒子的样品，饱和磁化强度和矫顽力都从0.36增加到16.03 emu / g，并且从115增加到293 Oe。薄膜的弹性模量从2.7增加到4。分别有20 wt％的未加载和已加载样品为9 GPa。发现聚合物膜的储能模量服从渗滤行为。