Oxygen-octahedral phonon properties of x BaTiO3 + (1-x) Ba (Mg13 Ta23) O3 and xCa (Sc12 Nb12) O3 + (1-x) Ba (Sc12 Nb12) O3 microwave ceramics

Chih Ta Chia, Pi Jung Chang, Mei Yu Chen, I. Nan Lin, Hiroyuki Ikawa, L. J. Lin

研究成果: 雜誌貢獻期刊論文同行評審

9 引文 斯高帕斯(Scopus)

摘要

Oxygen-octahedral A1g (O) phonons for both 1:2 ordered x BaTiO3 + (1-x) Ba (Mg13 Ta23) O3 (0≤x≤:0.05) and 1:1 ordered xCa (Sc12 Nb12) O3 + (1-x) Ba (Sc12 Nb12) O3 (0≤x≤:0.25) ceramics were investigated using Raman scattering. Lineshapes of A1g (O) phonons directly reflect structural characteristic of TiO6, TaO6, ScO6, and NbO6 octahedral cages that are strongly correlated with microwave performance of the samples. The larger width of stretching A1g (O) phonon, implies poor crystalline structure and short phonon lifetime, giving us lower value of Q×f. The atomic polarizabilities of Ta5+, Ti4+, Ca2+, Sc3+, and Nb5+ have a strong influence on the structure of oxygen octahedron that dominates microwave performance of x BaTiO3 + (1-x) Ba (Mg13 Ta23) O3 and xCa (Sc12 Nb12) O3 + (1-x) Ba (Sc12 Nb12) O3 ceramics.

原文英語
文章編號084115
期刊Journal of Applied Physics
101
發行號8
DOIs
出版狀態已發佈 - 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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