TY - JOUR
T1 - Dielectric properties of high-Q (Mg 1-xZn x) 1.8Ti 1.1O 4 ceramics at microwave frequency
AU - Huang, Cheng Liang
AU - Tseng, Yu Wei
AU - Chen, Jhih Yong
AU - Kuo, Yuan Cheng
N1 - Funding Information:
This work was financially supported by the National Science Council of Taiwan under grant NSC100-2221-E-006-124-MY3 .
PY - 2012/8
Y1 - 2012/8
N2 - (Mg 1-xZn x) 1.8Ti 1.1O 4 (x=0.03-1.00) ceramics were prepared via the conventional solid-state method and their dielectric properties were investigated in the microwave frequency region. Formation of solid solutions was confirmed by the X-ray diffraction analysis, the EDX analysis, and the measured lattice parameters. A small amount of Zn substitution for Mg produced a large increase in Q×f due to a high packing fraction as well as a high relative density of the ceramics. By increasing x from 0.00 to 0.06, the Q×f of the specimen could be tremendously improved from 141,000 to a maximum of 210,700GHz (at 10.52GHz), demonstrating an unique potential for low-loss microwave applications. The τ f values were found to retain in the range from -54.2 to -62.3ppm/°C for all compositions because the resultant change of unit cell volume was small. Also, a remarkable lowering of the sintering temperature down to ~300°C was observed when Mg was totally substituted by Zn, thereby making it possible for low firing applications.
AB - (Mg 1-xZn x) 1.8Ti 1.1O 4 (x=0.03-1.00) ceramics were prepared via the conventional solid-state method and their dielectric properties were investigated in the microwave frequency region. Formation of solid solutions was confirmed by the X-ray diffraction analysis, the EDX analysis, and the measured lattice parameters. A small amount of Zn substitution for Mg produced a large increase in Q×f due to a high packing fraction as well as a high relative density of the ceramics. By increasing x from 0.00 to 0.06, the Q×f of the specimen could be tremendously improved from 141,000 to a maximum of 210,700GHz (at 10.52GHz), demonstrating an unique potential for low-loss microwave applications. The τ f values were found to retain in the range from -54.2 to -62.3ppm/°C for all compositions because the resultant change of unit cell volume was small. Also, a remarkable lowering of the sintering temperature down to ~300°C was observed when Mg was totally substituted by Zn, thereby making it possible for low firing applications.
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U2 - 10.1016/j.jeurceramsoc.2012.02.043
DO - 10.1016/j.jeurceramsoc.2012.02.043
M3 - Article
AN - SCOPUS:84860600655
SN - 0955-2219
VL - 32
SP - 2365
EP - 2371
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 10
ER -