TY - JOUR
T1 - Dielectric properties of B2O3 doped Sm(Co 1/2Ti1/2)O3 ceramics at microwave frequency
AU - Soong, Hong Tie
AU - Hsu, Cheng Hsing
AU - Huang, Cheng Liang
AU - Kuo, Ming Ta
N1 - Funding Information:
Acknowledgement This work was supported by the National Science Council of the Republic of China under grant NSC93-2213-E-006-038.
PY - 2007/4
Y1 - 2007/4
N2 - The microwave dielectric properties and the microstructures of Sm(Co 1/2Ti1/2)O3 ceramics with B2O 3 additions (0.25 and 0.5 wt%) prepared by conventional solid-state route have been investigated. The prepared Sm(Co1/2Ti 1/2)O3 exhibited a mixture of Co and Ti showing 1:1 order in the B-site. Doping with B2O3 (up to 0.5 wt%) can effectively promote the densification of Sm(Co1/2Ti 1/2)O3 ceramics with low sintering temperature. It is found that Sm(Co1/2Ti1/2)O3 ceramics can be sintered at 1,260 °C due to the grain boundary phase effect of B 2O3 addition. At 1,290 °C, Sm(Co1/2Ti 1/2)O3 ceramics with 0.5 wt% B2O3 addition possess a dielectric constant (ε r) of 27.7, a Q × f value of 33,600 (at 9 GHz) and a temperature coefficient of resonant frequency (τf) of -11.4 ppm/ °C. The B2O 3-doped Sm(Co1/2Ti1/2)O3 ceramics can find applications in microwave devices requiring low sintering temperature.
AB - The microwave dielectric properties and the microstructures of Sm(Co 1/2Ti1/2)O3 ceramics with B2O 3 additions (0.25 and 0.5 wt%) prepared by conventional solid-state route have been investigated. The prepared Sm(Co1/2Ti 1/2)O3 exhibited a mixture of Co and Ti showing 1:1 order in the B-site. Doping with B2O3 (up to 0.5 wt%) can effectively promote the densification of Sm(Co1/2Ti 1/2)O3 ceramics with low sintering temperature. It is found that Sm(Co1/2Ti1/2)O3 ceramics can be sintered at 1,260 °C due to the grain boundary phase effect of B 2O3 addition. At 1,290 °C, Sm(Co1/2Ti 1/2)O3 ceramics with 0.5 wt% B2O3 addition possess a dielectric constant (ε r) of 27.7, a Q × f value of 33,600 (at 9 GHz) and a temperature coefficient of resonant frequency (τf) of -11.4 ppm/ °C. The B2O 3-doped Sm(Co1/2Ti1/2)O3 ceramics can find applications in microwave devices requiring low sintering temperature.
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U2 - 10.1007/s10853-006-1270-6
DO - 10.1007/s10853-006-1270-6
M3 - Article
AN - SCOPUS:33947572959
SN - 0022-2461
VL - 42
SP - 2393
EP - 2398
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 7
ER -