Vibrational analysis of Ba{sub 5-x}Sr{sub x}Nb{sub 4}O{sub 15} microwave dielectric ceramic resonators
- Industrial Estate, Trivandrum (India)
The Ba{sub 5-x}Sr{sub x}Nb{sub 4}O{sub 15} ceramics have been prepared and characterised using XRD, Raman, FTIR, and microwave dielectric property measurements. The measured dielectric properties show smooth variation with Sr content. The spectroscopic studies show that the symmetry of the NbO{sub 6} octahedra increases with increase in strontium content, maintaining the hexagonal structure. Hence, the possibility of a monoclinic structure for Sr{sub 5}Nb{sub 4}O{sub 15} seems to be inappropriate. The observed symmetric stretching bands of NbO{sub 6} octahedra confirm the existence of corner connected octahedra in all the solid solution compounds. The behavior of the dielectric constant of (Ba{sub 5-x}Sr{sub x})Nb{sub 4}O{sub 15} system can be correlated to the variation of symmetric stretching vibrations of NbO{sub 6} octahedra.
- OSTI ID:
- 589005
- Journal Information:
- Journal of Solid State Chemistry, Vol. 131, Issue 1; Other Information: PBD: Jun 1997
- Country of Publication:
- United States
- Language:
- English
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