Structure and Properties of BaFe12O19 Coated Fly Ash Cenospheres by Sol-Gel Process

• Published in: Journal of Wuhan University of Technology. Materials science edition Vol. 21; no. 3; pp. 129 - 131
• Main Authors: Aixiang, Zeng, Weihao, Xiong, Caifang, Wang, Qionghua, Zhou
• Format: Journal Article
• Language: English
• Published: Wuhan Springer Nature B.V 01.09.2006; Department of Materials Science and Technology, Changsha University of Science and Technology,Changsha 410076, China; State Kay Laboratry of Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China%State Kay Laboratry of Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China%Department of Materials Science and Technology, Changsha University of Science and Technology,Changsha 410076, China
• Subjects: Barium; Scanning electron microscopy; Spectrum analysis; Studies; 溶胶-凝胶处理; 钡铁氧体; 飞灰煤胞粒子; coating; barium hexaferrite; fly ash cenosphere particles; sol-gel
• ISSN: 1000-2413; 1993-0437
• DOI: 10.1007/BF02840901

Thin films of barium hexaferrite were prepared on fly ash cenosphere particles by the sol-gel method using Fe（ NO3 ）3 ·9H2O, Ba（ NO3 ）2 and citric acid as raw materials. The prepared films were characterized by differential thermal and thermogravimetric analysis （DTA-TG）, X-ray diffraction analysis （XRD）, scanning electron microscopy （SEM）, energy dispersive spectroscopy （EDX）, X-ray photoelectron spectroscopy （XPS）, and vibrating sample magnetometry . The magnetic and structural properties of barium hexaferrite coated cenosphere particles were also studied. The experimental results show that even and continual barium hexaferrite coatings were prepared on fly ash cenospheres , and the magnetic conductivity was imparted to these non-conducting oxide ceramic particles. The low density barium hexaferrite coated cenosphere particles may be atilized for manufacturing microwave absorbing materials.