Synthesis and microwave absorbing properties of La-doped Sr-hexaferrite nanopowders via sol-gel auto-combustion method

作     者：Jun-Liang Liu Peng Zhang Xing-Kai Zhang Qing-Qing Xie Dong-Jun Pan Jian Zhang Ming Zhang 

作者机构：School of Chemistry and Chemical EngineeringYangzhou UniversityYangzhou 225002China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2017年第36卷第9期

页      面：704-710页

核心收录：

学科分类：07[理学] 0806[工学-冶金工程] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：financially supported by the National Natural Science Foundation of China(No.51103125) the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(Chemistry) the Natural Science Foundation of Yangzhou(No.YZ2014043) the Science Innovative Foundation of Yangzhou University(No.2014CXJ017) the Graduate Student Innovation foundation of Yangzhou University(No.CXLX 1413) 

主　　题：Ferrite La-doping Nanopowders Sol-gelauto-combustion Microwave absorbing properties 

摘      要：La-doped Sr-hexaferrite（Sr（1-x）LaxFe（12）O（19））（x=0.05,0.10,0.15,0.20） nanopowders with particle size ranging from 80 to 110 nm were successfully synthesized by sol-gel auto-combustion. The phase formation temperature increases, while the particle size decreases as the Ladoping content goes up. The partial substitution of Sr^（2＋） by La^（3＋） results in the suppression effects on the growth-up of the crystallites and the enhancement of the electron hopping between Fe^（3＋） with different valences, which leads to the improvement in the dielectric loss and magnetic ***, both the microwave absorbing abilities and absorbing frequency ranges are tuned by La-doping. The synthesized Sr-hexaferrite nanopowders with doping element content of 0.10 demonstrate the fine broad microwave absorbing properties.