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http://dx.doi.org/10.4191/KCERS.2007.44.1.537

Microwave Dielectric Properties of 0.95Ca0.85Nd0.1TiO3−0.05LnAlO3 (Ln=Sm, Dy, Er) Ceramics  

Kim, Eung-Soo (Department of Materials Engineering, Kyonggi University)
Jeon, Chang-Jun (Department of Materials Engineering, Kyonggi University)
Publication Information
Journal of the Korean Ceramic Society / v.44, no.10, 2007 , pp. 537-541 More about this Journal
Abstract
Microwave dielectric properties of $0.95 Ca_{0.85}Nd_{0.1}TiO_3-0.05LnAlO_3$ (Ln=Sm, DH, Er) were investigated as a function of sintering temperature and lanthanide ion type. A single perovskite phase with an orthorhombic structure was obtained throughout the entire range of composition. The dielectric constant (K) was dependent upon the dielectric polarizabilities and the B-site bond valence in the $ABO_3$ perovskite structure. The quality factor (Qf) of the specimens with $ErAlO_3$ was smaller than those with $SmAlO_3\;and/or\;DyAlO_3$ due to the smaller grain size. The temperature coefficient of resonant frequency (TCF) could be controlled from $107.28ppm/^{\circ}C$ at Ln=Sm to $87.23ppm/^{\circ}C$ at Ln=Er due to the changes of B-site bond valence in the $ABO_3$ perovskite structure.
Keywords
$Ca_{0.85}Nd_{0.1}TiO_3$; $LnAlO_3$(Ln=Sm, Dy, Er); Bond valence; Microwave Dielectric properties;
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