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http://dx.doi.org/10.4313/JKEM.2008.21.6.517

Microwave Dielectric Properties of the LiNb3O8-TiO2 Ceramic System with the Addition of Low Firing Agents  

Choi, Myung-Ho (공주대학교 공과대학 신소재공학부)
Kim, Nam-Chul (공주대학교 공과대학 신소재공학부)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.21, no.6, 2008 , pp. 517-523 More about this Journal
Abstract
The microwave dielectric properties of $LiNb_3O_8-TiO_2$ based ceramics with low firing agents, CuO, $Bi_2O_3$, $B_2O_3$, $SiO_2$, $TiO_2$, were investigated to improve the sintering condition for the LTCC system. According to the X-ray diffraction and SEM, the ceramics of $LiNb_3O_8-TiO_2$ with low firing agents showed no significant second phases within a range of experiments, and fine microstructures. By adding the low firing agents, the sintering temperature decreased from $1200^{\circ}C$ to $925^{\circ}C$. Based on the results of electrical measurements, the $LiNb_3O_8-TiO_2$ ceramics showed a promising microwave dielectric properties for LTCC applications, those are ${\varepsilon}_r$ (dielectric constant) = 44, Q f (quality factor) = 18000, and ${\tau}_f$ (the temperature coefficient of resonant frequency) = $-1.5\;ppm/^{\circ}C$.
Keywords
LTCC$LiNb_3O_8$; Low firing agents; Microwave dieiectrics; Dielectric properties;
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Times Cited By KSCI : 2  (Citation Analysis)
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