Investigation on the Effect of Mn on the Dielectric Properties of Ba_0.4Sr_0.6TiO₃/MgAl₂O₄/MgO Composite Ceramics

Abstract:

xMnCO3–(1–x)[70wt% (10wt% MgO–90wt% Ba0.4Sr0.6TiO3)–30wt% MgAl2O4] (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 Ba0.4Sr0.6TiO3(BST), MgAl2O4(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(E0)−ε(E)]/ε(E0)) is also initially improved and then decreased by doping MnCO3.

• Periodical: Key Engineering Materials (Volumes 421-422)
• Pages: 65-68
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.421-422.65
• Online since: December 2009
• Authors: Jing Ji Zhang, Ji Wei Zhai, Ming Wei Zhang, Xi Yao
• Keywords: Composite Ceramic, Dielectric Property, Tunability

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