Dielectric properties of rutile structure (Zn₁/₃B₂/₃)x(TiySn(1-y))(1-x)O₂ (B=Nb⁵+,Ta⁵+) at microwave frequencies.
The microwave dielectric properties of rutile (Zn₁/₃ B₂/₃)x(TiySn(1-y))(1-x)O₂ (B=Nb⁵+,Ta⁵+, 0.05 ≤ x ≤ 0.35, y = 0.2, 0.8) were investigated with structural characteristics. A single phase with tetragonal rutile (P4₂/mnm, no. 136, Z = 2) structure was obtained through the entire range of compositions. With an increase of (Zn₁/₃B₂/₃)O₂ content, the dielectric constant (K) of sintered specimens with (Ti₀.₂Sn₀.₈)O₂ increased, whereas that of the specimens with (Ti₀.₂Sn₀.₈)O₂ decreased. The temperature coefficient of resonant frequency (TCF) of sintered specimens was dependent upon oxygen octahedral distortion and/or cations bond valence of the rutile structure. The quality factor (Qf) was dependent upon (Zn₁/₃B₂/₃)O₂ content, and the specimens with (Ti₀.₂Sn₀.₈)O₂ showed larger Qf values than those with (Ti₀.₂Sn₀.₈)O₂ for the same content of (Zn₁/₃B₂/₃)O₂.
Kim
Eung Soo
ES
Department of Materials Engineering, Kyonggi University, Suwon, Korea. eskim@kyonggi.ac.kr
Seo
Seock No
SN