The piezoelectric and dielectric properties of Ca-additive Sm-modified PbTiO3 ceramics intended for surface acoustic wave devices

Te Yi Chen, Sheng Yuan Chu

研究成果: Article同行評審

15 引文 斯高帕斯(Scopus)

摘要

Sm-modified lead titanate ceramics with a composition of (Pb0.88-x CaxSm0.08 (Ti0.98Mn0.02) O3; x=0.11∼0.17 were prepared by conventional mixed -oxide method. The dielectric and piezoelectric properties of these doped ceramics were measured at room temperature. Microstructural and compositional analyses have been carried out using SEM and XRD. The Curie point (Tc) was studied by measuring the dielectric behavior as a function of temperature. The experiments successfully showed that Ca additive not only reduce the lattice anisotropy but is also helpful in providing a higher thickness electromechanical coupling coefficient, kt (>0.57), than that of conventional PbTiO3 based ceramics while still keeping a small planar electromechanical coupling coefficient, kp. In addition, the Ca additive produced a higher phase velocity and high electromechanical coupling coefficient. The SAW properties of our samples (Vp and k2) are better than those of commercially-made PZT and PT samples.

原文English
頁(從 - 到)2171-2176
頁數6
期刊Journal of the European Ceramic Society
23
發行號12
DOIs
出版狀態Published - 2003 十一月

All Science Journal Classification (ASJC) codes

  • 陶瓷和複合材料
  • 材料化學

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