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Erschienen in:
01.06.2008
Effect of Mn substitutions on dielectric properties of high dielectric constant BaTiO3-based ceramic
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 6/2008
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Abstract
The effects of Mn added during processing on the dielectric properties and microstructure of the BaTiO3-based ceramic materials system were discussed. Experiments show that a proper content of Mn can significantly increase dielectric constant (ε) and reduce the dielectric loss (tanδ) in BaTiO3-based X7R ceramic materials. The results attribute to the reaction:
\( {\text{Mn}}^{{{\text{4 + }}}} {\text{ + 2Ti}}^{{{\text{3 + }}}} \, \to {\text{Mn}}^{{{\text{2 + }}}} {\text{ + 2Ti}}^{{{\text{4 + }}}} \). When the system doped with 0.046mol% MnCO3 was sintered at 1240 °C for 4 h, the ε, tanδ and TCC were 5800, 1.6%, 0 ± 10% at 1 KHz respectively.