Ferroelectric Properties of Bismuth Titanate Ceramics by Er3+/V5+ Substitution

摘要

The ferroelectricity of Bi3.2Er0.8Ti3O12 (BET),and Bi3.2Er0.8Ti2.97V0.03O12 (BETV) ceramics prepared at 1100°C by a conventional ceramic technique was investigated.These ceramics possess random-oriented polycrystalline structure.The remanent polarization (Pr) and coercive field (Ec) of the BET ceramics are 18 μC/cm2 and 64kV/cm,respectively.Furthermore,V substitution improves the Pr value of the BETV ceramics up to 30 μC/cm2,which is much larger than that of the BET ceramics.Therefore,co-sustitution of Er and V in Bi4Ti3O12 (BIT) ceramic is effective for the improvement of its ferroelectricity.