Title :
Dielectric properties of rutile structure (Zn1/3B2/3)x(TiySn1ߝy)1ߝxO2 (B=Nb5+,Ta5+) at microwave frequencies
Author :
Kim, Eung Soo ; Seo, Seock No
Author_Institution :
Dept. of Mater. Eng., Kyonggi Univ., Suwon, South Korea
fDate :
10/1/2010 12:00:00 AM
Abstract :
The microwave dielectric properties of rutile (Zn1/3B2/3)x(TiySn1-y)1-xO2 (B = Nb5+, Ta5+, 0.05 ≤ × ≤ 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 (Ti0.8Sn0.2)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 (Ti0.8Sn0.2)O2 for the same content of (Zn1/3B2/3)O2.
Keywords :
Q-factor; crystal structure; dielectric resonance; niobium compounds; permittivity; tantalum compounds; titanium compounds; valency; zinc compounds; (Zn0.33Nb0.67)x(TiySn1-y)1-xO2; (Zn0.33Ta0.67)x(TiySn1-y)1-xO2; cation bond valence; crystal structure; dielectric constant; microwave dielectric properties; oxygen octahedral distortion; quality factor; resonant frequency temperature coefficient; rutile structure; single phase; tetragonal rutile structure; Crystals; Dielectric constant; Ions; Powders; Temperature; Temperature measurement;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2010.1686
