Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8948542 | Journal of the European Ceramic Society | 2018 | 24 Pages |
Abstract
Two low temperature sintered NaPb2B2V3O12 (Bâ=âMg, Zn) ceramics with garnet structure were synthesized through conventional solid state reaction route and their crystal structure and microwave dielectric properties were investigated for the first time. Rietveld refinements of XRD patterns show both the compounds belong to cubic symmetry with space group Ia-3d. Observed number of Raman bands and group theoretical predictions also confirm cubic symmetry with space group Ia-3d for both NPMVO and NPZVO. At the optimum sintering temperature of 725â°C NPMVO has a relative permittivity of 20.6â±â0.2, unloaded quality factor (Quxf) of 22,800â±â1500âGHz (fâ=â7.7âGHz) and temperature coefficient of resonant frequency +25.1â±â1âppm/°C while NPZVO has relative permittivity of 22.4â±â0.2, Quxf of 7900â±â1500âGHz (fâ=â7.4âGHz) and near zero temperature coefficient of resonant frequency of -6â±â1âppm/°C at 650â°C. The relative permittivity of the compounds is inversely related to the corresponding Raman shifts.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Rakhi M., Subodh G.,