کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1616945 | 1005673 | 2011 | 4 صفحه PDF | دانلود رایگان |
Microstructure and microwave dielectric properties of Mg-substituted ZnNb2O6–TiO2 microwave ceramics were investigated. Mg acted as a grain refining reagent and columbite phase stabilization reagent. With an increasing Mg content, the amount of ixiolite (Zn, Mg) TiNb2O8 decreased, and the amount of (Zn0.9Mg0.1)0.17Nb0.33Ti0.5O2 and columbite increased. ZnO–Nb2O5–1.75TiO2–5 mol.%MgO exhibited excellent dielectric properties (at 950 °C): ɛr = 35.6, Q × f = 16,000 GHz (at 5.6 GHz) and τf = −10 ppm/°C. The material was applied successfully to make RF/microwaves ceramic capacitor, whose self-resonance frequency was 19 GHz at low capacitance of 0.13 pF.
► Mg acted as a grain refining reagent and columbite phase stabilization reagent. With an increasing Mg content, the amount of ixiolite (Zn, Mg)TiNb2O8 decreased while the amounts of (Zn0.9Mg0.1)0.17Nb0.33Ti0.5O2 and columbite increased. ZnO–Nb2O5–1.75TiO2–5 mol.%MgO exhibited excellent dielectric properties. The material was applied successfully to make RF/microwaves ceramic capacitor, whose self-resonance frequency was 19GHz at low capacitance of 0.13 pF.
Journal: Journal of Alloys and Compounds - Volume 509, Issue 31, 4 August 2011, Pages 8126–8129