Fourier Transform Far-infrared Reflection Spectroscopy of BaZn1/3(Nb1-xTax)2/3O3 Solid Solutions
BaZn1/3(Nb1-xTax)2/3O3 (BZNT, x =0.0, 0.2, 0.4, 0.6, 0.8, 1.0) solid solutions were synthesized by conventional solid-state sintering technique.Fourier transform far-infrared reflection spectroscopy (FTIR) and X-ray diffraction (XRD) were employed to evaluate the correlation between crystal structures and vibration modes of these solid solutions as a function of Nb5+ ions replaced by Ta5+ ions.Spectroscopic and structural data show sensitivity to the sample structural evolution with Ta5+ concentration.XRD result shows that the peaks shift to lower angle, i.e.higher d-spacing, with the increase in Ta5+content, and the lattice structures have changed from cubic structure to hexagonal structure gradually with the increase in the unit cell volume due to the substitution of Ta5+ to Nb5+.The phase transition is also verified by the FTIR spectra.The phonon modes of the vibration spectra were assigned, the position and width were determined, and the correlation of phonon vibrations with the crystal structures for the different atoms substituted in the B-site was found.
Microwave dielectric ceramics Fourier transform far-infrared reflection spectroscopy Crystal structures Phonon modes
Feng Shi Yufen Gu Cuixia Li
School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, P.R.China
国际会议
The Eighth China National Conference on Functional Materials and Applications(第八届中国功能材料及其应用学术会议)
哈尔滨
英文
316-321
2013-08-23（万方平台首次上网日期，不代表论文的发表时间）