Effect of strontium on the structural and piezoelectric properties of the sol gel processed barium titanate
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Structural, dielectric and piezoelectric properties of nanopowders of pure and strontium-doped BaTiO3 (Ba1-xSrx)TiO3 (x =0.00; 0.10; 0.20; 0.30 and 0.40), synthesized by the sol gel process, have been investigated. The samples crystallize in the pureperovskite structure and transform from tetragonal to pseudocubic under doping with Sr. The calculated average crystallitesize was about 30 nm. Dielectric parameters (dielectric permittivity and losses) were determined. Sr doping gives rise to adecrease of the ferro-to-paraelctric transition temperature and to an enhancement of the Positive Temperature Coefficient ofResistivity (PTCR). Piezoelectric parameters were also determined and their thermal behavior investigated.
Abstract
Structural, dielectric and piezoelectric properties of nanopowders of pure and strontium-doped BaTiO3 (Ba1-xSrx)TiO3 (x =0.00; 0.10; 0.20; 0.30 and 0.40), synthesized by the sol gel process, have been investigated. The samples crystallize in the pureperovskite structure and transform from tetragonal to pseudocubic under doping with Sr. The calculated average crystallitesize was about 30 nm. Dielectric parameters (dielectric permittivity and losses) were determined. Sr doping gives rise to adecrease of the ferro-to-paraelctric transition temperature and to an enhancement of the Positive Temperature Coefficient ofResistivity (PTCR). Piezoelectric parameters were also determined and their thermal behavior investigated.
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