TY - JOUR
T1 - Effect of CuO additive on sintering and microwave dielectric behavior of LaAlO3 ceramics
AU - Hsu, Cheng Shing
AU - Huang, Cheng Liang
N1 - Funding Information:
This work was supported by the National Science Council of the Republic of China under grant NSC89-2213-E-006-200.
PY - 2001/9/15
Y1 - 2001/9/15
N2 - The dielectric properties and the microstructures of LaAlO3 ceramics with CuO additions (0.25-1 wt%) have been investigated. The sintered LaAlO3 ceramics are characterized by X-ray diffraction spectra and scanning electron microscopy (SEM). The ceramic samples show that a dielectric constant (εr) of 19-22 and a Q × f value of 5000-48,000(at 9.7 GHz) can be obtained at low sintering temperatures of 1370-1460°C. The temperature coefficient of resonant frequency varies from -50 to -80 ppm/°C. At the level of 0.5 wt% and 1 wt% CuO additions, low Q × f value of the LaAlO3 ceramics is owing to the formation of the second phase LaAl11O18. With CuO addition, an 100-200°C reduction in sintering temperature can be achieved for the LaAlO3 ceramics.
AB - The dielectric properties and the microstructures of LaAlO3 ceramics with CuO additions (0.25-1 wt%) have been investigated. The sintered LaAlO3 ceramics are characterized by X-ray diffraction spectra and scanning electron microscopy (SEM). The ceramic samples show that a dielectric constant (εr) of 19-22 and a Q × f value of 5000-48,000(at 9.7 GHz) can be obtained at low sintering temperatures of 1370-1460°C. The temperature coefficient of resonant frequency varies from -50 to -80 ppm/°C. At the level of 0.5 wt% and 1 wt% CuO additions, low Q × f value of the LaAlO3 ceramics is owing to the formation of the second phase LaAl11O18. With CuO addition, an 100-200°C reduction in sintering temperature can be achieved for the LaAlO3 ceramics.
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U2 - 10.1016/S0025-5408(01)00695-X
DO - 10.1016/S0025-5408(01)00695-X
M3 - Article
AN - SCOPUS:0035885431
VL - 36
SP - 1939
EP - 1947
JO - Materials Research Bulletin
JF - Materials Research Bulletin
SN - 0025-5408
IS - 11
ER -