Investigation on CuCa3Ti4O12 Modified BiFeO3-Based Perovskite Ceramics

Investigation on CuCa3Ti4O12 Modified BiFeO3-Based Perovskite Ceramics

(BiFeO3)1−x–(CuCa3Ti4O12)x (x = 0.00, 0.10 and 0.20) ceramics had been prepared via the mixed route. The crystal structure transformation of BiFeO3 (BFO) from rhombohedral to pseudotetragonal phase was induced by 20 mol% CuCa3Ti4O12 (CCTO). Impedance measurements suggested the increase in grain boun...

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Veröffentlicht in:International journal of applied ceramic technology 2015-01, Vol.12 (1), p.157-162
Hauptverfasser: Wang, Ben, Gong, Lixiu, Wang, Shumei, Zhou, Zhufa, Ma, Guilin
Format: Artikel
Sprache:eng
Schlagworte:
Blocking
BOUNDARIES
CERAMICS
COPPER OXIDE
Crystal defects
CRYSTAL STRUCTURE
DEFECTS
DIELECTRIC CONSTANT
Grain boundaries
LATTICE DEFECTS
Magnetization
PHASE TRANSFORMATIONS
Tangents
Transformations
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Zusammenfassung:(BiFeO3)1−x–(CuCa3Ti4O12)x (x = 0.00, 0.10 and 0.20) ceramics had been prepared via the mixed route. The crystal structure transformation of BiFeO3 (BFO) from rhombohedral to pseudotetragonal phase was induced by 20 mol% CuCa3Ti4O12 (CCTO). Impedance measurements suggested the increase in grain boundary resistance, and CCTO addition could block the conduction path and stabilize the motion of defects. The dielectric constant and the loss tangent of BFO as a function of frequency were found to be incremental on increasing CCTO contents. The enhancement of magnetization would be attributed to the effective suppression of the spiral spin structure and the structure transformation.
ISSN:1546-542X
1744-7402
DOI:10.1111/ijac.12138