High-temperature piezoelectric (1−x)BiScO3−xPbTiO3 ceramics with composition (x=0.62, 0.63, 0.64,... more High-temperature piezoelectric (1−x)BiScO3−xPbTiO3 ceramics with composition (x=0.62, 0.63, 0.64, and 0.65) near the morphotropic phase boundary were fabricated. A thermal depoling experiment was used to investigate the stability of polarization at the temperature range from 200° to 460°C. The results indicated that samples with rhombohedral phase began to depole when the temperature was higher than 300°C, while samples with a tetragonal phase showed good resistance to thermal depoling up to 440°C, close to their Curie temperature.
Recently, a new family of piezoelectric perovskite materials based on the solid solution (1−x)BiS... more Recently, a new family of piezoelectric perovskite materials based on the solid solution (1−x)BiScO3–xPbTiO3 was developed. This system was found to have a Curie temperature higher than 450°C and excellent piezoelectric properties near the MPB composition. Niobium, as a donor dopant in the piezoelectric system Pb(Zr,Ti)O3 and other lead-based perovskite materials, has commonly been used to increase the electrical resistivity, dielectric, and piezoelectric properties. In the current work, the effect of niobium substitution in the BS–PT system has been reported. The results of niobium additions in the BS–PT system showed no large enhancement of the piezoelectric properties. Niobium doping also led to lower Curie temperatures and higher dielectric loss. Further grain size effects in niobium-doped BS–PT compositions provided experimental evidence of significant extrinsic contributions to the piezoelectric properties in this system.
A modified citrate precursor method, combining the advantages of the nitrate autocombustion metho... more A modified citrate precursor method, combining the advantages of the nitrate autocombustion method by introducing the nitric acid, was successfully used to synthesize ultrafine Ba0. 70Sr0. 30TiO3 powders. Slight agglomerated and homogenized BST ...
High-temperature piezoelectric (1−x)BiScO3−xPbTiO3 ceramics with composition (x=0.62, 0.63, 0.64,... more High-temperature piezoelectric (1−x)BiScO3−xPbTiO3 ceramics with composition (x=0.62, 0.63, 0.64, and 0.65) near the morphotropic phase boundary were fabricated. A thermal depoling experiment was used to investigate the stability of polarization at the temperature range from 200° to 460°C. The results indicated that samples with rhombohedral phase began to depole when the temperature was higher than 300°C, while samples with a tetragonal phase showed good resistance to thermal depoling up to 440°C, close to their Curie temperature.
Recently, a new family of piezoelectric perovskite materials based on the solid solution (1−x)BiS... more Recently, a new family of piezoelectric perovskite materials based on the solid solution (1−x)BiScO3–xPbTiO3 was developed. This system was found to have a Curie temperature higher than 450°C and excellent piezoelectric properties near the MPB composition. Niobium, as a donor dopant in the piezoelectric system Pb(Zr,Ti)O3 and other lead-based perovskite materials, has commonly been used to increase the electrical resistivity, dielectric, and piezoelectric properties. In the current work, the effect of niobium substitution in the BS–PT system has been reported. The results of niobium additions in the BS–PT system showed no large enhancement of the piezoelectric properties. Niobium doping also led to lower Curie temperatures and higher dielectric loss. Further grain size effects in niobium-doped BS–PT compositions provided experimental evidence of significant extrinsic contributions to the piezoelectric properties in this system.
A modified citrate precursor method, combining the advantages of the nitrate autocombustion metho... more A modified citrate precursor method, combining the advantages of the nitrate autocombustion method by introducing the nitric acid, was successfully used to synthesize ultrafine Ba0. 70Sr0. 30TiO3 powders. Slight agglomerated and homogenized BST ...
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