首页|Investigation on the effect of Mn on the dielectric properties of Ba_(0.4)Sr_(0.6)TiO_3/MgAl_2O_4/MgO composite ceramics
Investigation on the effect of Mn on the dielectric properties of Ba_(0.4)Sr_(0.6)TiO_3/MgAl_2O_4/MgO composite ceramics
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NSTL
Trans Tech Publications Ltd
xMnCO_3-(1-x)[70wt% (10wt% MgO-90wt% Ba_(0.4)Sr_(0.6)TiO_3)-30wt% MgAl_2O_4] (where x=0.0, 0.5, 1.0, 2.0, 5.0 and 10.0wt%) composite ceramics have been prepared through the solid-state reactions. Three phases, corresponding to the Ba_(0.4)Sr_(0.6)TiO_3(BST), MgAl_2O_4(MA) and MgO phases, are clearly visible in the composite ceramics. The permittivity peak is initially enhanced and shifted toward a higher temperature and then suppressed, shifted toward a lower temperature. Meanwhile, the tunability (calculated by [ε(E_0)-ε(E)]/ε(E_0)) is also initially improved and then decreased by doping MnCO_3.
dielectric propertiescomposite ceramicstunability
Jingji Zhang、Tiwei Zhai、Mingwei Zhang、Xi Yao
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Functional Materials Research Laboratory, Tongji University, 1239 Siping Road, Shanghai 200092, China
NETL
NSTL
Trans Tech Publications Ltd
