Effect of Y2O3 and ZnO Co-doping on the Microstructure and Dielectric Properties of BaTiO3 Materials

doi:10.3724/SP.J.1077.2007.00451

Abstract

Abstract: The effect of Y₂O₃ and ZnO on the microstructure and dielectric properties of BaTiO₃ materials was researched. XRD indicates the crystal structures of BaTiO₃ transform from tetragonal to pseudocubic by Y₂O₃and ZnO codoping. SEM shows Y₂O₃ behaves more effective grain-growth-inhibition than ZnO owing to the intergranular second-phase Y₂Ti₂O₇. Sufficient Y₂O₃ and ZnO can help to form the core-shell structure and improve the dielectric-temperature characteristics markedly. The high performance nonreducible dielectrics satisfying X7R can be achieved in the BaTiO₃-Y₂O₃-ZnO new system.

Key words: BaTiO3, Y2O3, ZnO, multilayer ceramic capacitor

CLC Number:

TM534

LI Bo,ZHANG Shu-Ren,ZHOU Xiao-Hua,YUAN Ying. Effect of Y₂O₃ and ZnO Co-doping on the Microstructure and Dielectric Properties of BaTiO₃ Materials[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2007.00451.

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Effect of Y₂O₃ and ZnO Co-doping on the Microstructure and Dielectric Properties of BaTiO₃ Materials

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