TY - JOUR
T1 - Dielectric properties of B2O3-doped (1 - x)LaAlO3-xSrTiO3 ceramic system at microwave frequency
AU - Huang, Cheng Liang
AU - Chiang, Kuo Hau
N1 - Funding Information:
This work was supported by the National Science Council of the Republic of China, under grant NSC90-2216-E-006-058.
PY - 2002/10/3
Y1 - 2002/10/3
N2 - The effects of B2O3 addition on the microwave dielectric properties and the microstructures of (1-x)LaAlO3-xSrTiO3 ceramics prepared by conventional solid-state routes have been investigated. Doping with 0.25wt.% B2O3 can effectively promote the densification and the microwave dielectric properties of (1-x)LaAlO3-xSrTiO3 ceramics. It is found that LaAlO3-SrTiO3 ceramics can be sintered at 1400°C due to the liquid phase effect of a B2O3 addition observed by scanning electronic microscopy (SEM). The dielectric constant as well as the Q×f value decreases with increasing B2O3 content. At 1460°C, 0.46LaAlO3-0.54SrTiO3 ceramics with 0.25wt.% B2O3 addition possesses a dielectric constant (r) of 35, a Q×f value of 38,000 (at 7GHz) and a temperature coefficients of resonant frequency (τf) of -1ppm/°C.
AB - The effects of B2O3 addition on the microwave dielectric properties and the microstructures of (1-x)LaAlO3-xSrTiO3 ceramics prepared by conventional solid-state routes have been investigated. Doping with 0.25wt.% B2O3 can effectively promote the densification and the microwave dielectric properties of (1-x)LaAlO3-xSrTiO3 ceramics. It is found that LaAlO3-SrTiO3 ceramics can be sintered at 1400°C due to the liquid phase effect of a B2O3 addition observed by scanning electronic microscopy (SEM). The dielectric constant as well as the Q×f value decreases with increasing B2O3 content. At 1460°C, 0.46LaAlO3-0.54SrTiO3 ceramics with 0.25wt.% B2O3 addition possesses a dielectric constant (r) of 35, a Q×f value of 38,000 (at 7GHz) and a temperature coefficients of resonant frequency (τf) of -1ppm/°C.
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U2 - 10.1016/S0025-5408(02)00871-1
DO - 10.1016/S0025-5408(02)00871-1
M3 - Article
AN - SCOPUS:0037015635
SN - 0025-5408
VL - 37
SP - 1941
EP - 1948
JO - Materials Research Bulletin
JF - Materials Research Bulletin
IS - 12
ER -