Investigation of microwave dielectric properties in the BaO-Nb sub(2)O sub(5)– P sub(2)O sub(5) system

BaNb sub(2)P sub(2)O sub(11) and Ba sub(3)Nb sub(2)P sub(4)O sub(18) compounds with corner-sharing NbO sub(6) octahedra and PO sub(4) tetrahedra were prepared by a conventional solid-state reaction method. The crystal structure and microstructure were investigated by X-ray powder diffraction and fie...

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Bibliographic Details
Published in:Journal of electroceramics 2009-10, Vol.23 (2-4), p.154-158
Main Authors: Cho, In-Sun, Lee, Jeong Seop, Bae, Shin-Tae, Kim, Jeong-Ryeol, Hong, Kug Sun
Format: Article
Language:English
Subjects:
Ceramics
Crystal structure
Density
Dielectric properties
Diffraction
Microwaves
Permittivity
Scanning electron microscopy
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Summary:BaNb sub(2)P sub(2)O sub(11) and Ba sub(3)Nb sub(2)P sub(4)O sub(18) compounds with corner-sharing NbO sub(6) octahedra and PO sub(4) tetrahedra were prepared by a conventional solid-state reaction method. The crystal structure and microstructure were investigated by X-ray powder diffraction and field emission scanning electron microscope, respectively. The microwave dielectric properties were measured using a network analyzer. Both ceramics were sintered at a relatively low temperature of 1150 degree C and had a relative density of 96%. Compared to Ba sub(3)Nb sub(2)P sub(4)O sub(18), BaNb sub(2)P sub(2)O sub(11) had a higher permittivity of 31.7. However, the quality factor of BaNb sub(2)P sub(2)O sub(11), was smaller than Ba sub(3)Nb sub(2)P sub(4) O sub(18). Furthermore, the effect of the crystal structure on the microwave dielectric properties was investigated.
ISSN:1385-3449
1573-8663
DOI:10.1007/s10832-007-9346-5