| Effect of CuO-V2O5 Addition on Microwave Dielectric Properties of (Pb0.45Ca0.55(Fe0.5Nb0.5)0.9Sn0.1]O3 Ceramics |
| Jong-Yoon Ha, Ji-Won Choi, Ki-Hyun Yoon1, Doo-Jin Choi1, Seok-Jin Yoon, Hyun-Jai Kim |
Thin Film Materials Research Center, KIST
1Department of Ceramic Engineering, Yonset University |
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| ABSTRACT |
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The effect of x wt% CuO-y wt% $V_2O_5$ content on the microwave properties of $(Pb_{0.45}Ca_{0.55})[(Fe_{0.5}Nb_{0.5})_{0.9}Sn_{0.1}]O_3$ (PCFNS) ceramics was investigated. In order to decrease the sintering temperature and use as a Low Temperature co-firing Ceramics (LTCC), CuO-$V_2O_5$ are added in the PCFNS. The bulk density, dielectric constant (${varepsilon}_r$) and quality factor(Q${cdot}f_0$) increased with increase in CuO content within a limited value. The microwave properties were degraded with increases in $V_2O_5$ content. The temperature coefficient of the resonant frequency (${tau}_f$) of PCFNS was shifted to positive value abruptly with increasing the $V_2O_5$ content, while the ${tau}_f$ was slightly shifted to positive value with increasing the CuO content. The optimized microwave properties, ${varepsilon}_r$ = 88, Q${cdot}f_0$ = 6100 (GHz), and ${tau}_f$ = 18 ppm/$^{circ}C$, were obtained in $(Pb_{0.45}Ca_{0.55})[(Fe_{0.5}Nb_{0.5})_{0.9}Sn_{0.1}]O_3$ with 0.2wt% CuO 0.05 wt% $V_2O_5$ and sintered at $1000^{circ}C$ for 3 h. The relationship between the microstructure and microwave dielectric properties of ceramics was studied by X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) |
| Key words:
Microwave, Dielectric, LTCC, Additive, CuO-$V_2O_5$ |
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