Abstract: Barium ferrite hollow microspheres were fabricated by plasma spray pyrolysis technique. The precursor solution was synthesized by chemical co-precipitation with BaCl2×2H2O and FeCl3×6H2O as basic raw materials. Microstructure and magnetic properties of the hollow microspheres were studied by XRD, SEM, image analysis and vibration sample magnetometometer techniques after thermal treatment. The results showed that the diameters of hollow microspheres distributed in 2~5 mm, the crystals were relatively perfect, and their size and saturation magnetization gradually increased with the temperature from 900℃ to 1100℃, the saturation magnetization was up to 47 A×m2/kg at 1100℃. Coercivity increased gradually to the maximum value of 2.6′105 A/m at 1000℃ and then decreased .

Key words: barium ferrite, plasma spray pyrolysi, chemical co-precipitation, hollow microspheres

摘要： 以BaCl2×2H2O和FeCl3×6H2O为基本原料，采用化学共沉淀法制得前驱溶液，并利用液相等离子高温分解法制得钡铁氧体空心微球. 热处理后用X射线衍射仪、扫描电子显微镜、图像分析仪及磁性能测量手段分析空心微球的微观结构和静磁特性. 结果显示，空心微球的尺寸分布在2~5 mm，热处理温度从900℃升高到1100℃，晶粒形貌逐渐完善，晶粒尺寸和饱和磁化强度逐渐增大，磁饱和强度在1100℃时达到48 A×m2/kg，矫顽力先增大后减小，并在1000℃达到最大值2.6′105 A/m.

关键词: 钡铁氧体, 等离子喷雾热解, 化学共沉淀, 空心微球