摘要
通过湿法球磨制备CoFe2O4-BaTiO3颗粒复合材料,研究材料成分和调制频率与电磁效应的关系。结果表明:电磁效应系数随着调制频率由400Hz增加到1000Hz而增加。由于CoFe2O4的电导率在400-1000Hz范围内对频率敏感,电磁效应的曲线特性而发生改变。在烧结过程中形成第三相Ba2Fe2O5,从而导致电磁效应的下降。
CoFe2O4-BaTiO3 particulate composites were prepared by wet ball milling method,their magnetoelectric（ME） effect was studied as a function of their constituents and modulation frequency.The results show that the ME coefficient increases as a function of modulation frequency from 400 to 1000 Hz and the ME characteristics of ME curves are also modified because the electrical conductivity of the CoFe2O4 phase is sensitive to the increase in frequency between 400 and 1 000 Hz.The third phase Ba2Fe2O5 formed during the sintering tends to reduce the ME effect.
基金
The TGIST scholarship (TG-33-12-51-048D) is granted to the first author by the National Metal and Materials Technology Center (MTEC) of NSTDA
