| Microwave Dielectric Properties of 0.95Ca0.85Nd0.1TiO3−0.05LnAlO3 (Ln=Sm, Dy, Er) Ceramics |
| Eung Soo Kim, Chang-Jun Jeon |
| Department of Materials Engineering, Kyonggi University |
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| ABSTRACT |
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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. 偹Η⨀ ⣎袥 Ā 倀 좔ﺖ⨀ Ȁ ᘀ Ā Η⨀ 삎 Ā 倀 悔ﺖ⨀ Ȁ ᘀ Ā zΗ⨀ 냔袥 紅 倀 ﺖ⨀ ē Ā 塺Η⨀ ᢏﺖ⨀ က 倀 邓ﺖ⨀ ଐ က Ā 炏ﺖ⨀ 胋袥 Ȁ 倀 ﺖ⨀ Ȁ ᘀ Ā ࡻΗ⨀ 烑袥 Ā 倀 颒ﺖ⨀ Ȁ ᘀ Ā 恻Η⨀ 炏 Ā 倀 をﺖ⨀ Ȁ ᘀ Ā 롻Η⨀ ₐ Ā 倀 좑ﺖ⨀ Ȁ ᘀ Ā ၼΗ⨀ ᣓ袥 Ā 倀 悑ﺖ⨀ Ȁ ᘀ Ā 桼Η⨀ ꃓ袥 Ā 倀 ﺖ⨀ Ȁ ᘀ Ā 쁼Η⨀ 뢈 Ā 倀 梐ﺖ⨀ Ȁ ᘀ Ā Η⨀ 儒 돀Η⨀ ꡩ |
| Key words:
$Ca_{0.85}Nd_{0.1}TiO_3$, $LnAlO_3$(Ln=Sm, Dy, Er), Bond valence, Microwave Dielectric properties |
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