TY - JOUR
T1 - Fabrication of (Zn1-xAlxO)5In 2O3 by microwave irradiation and thermoelectric characterization
AU - Endo, Tomoyuki
AU - Fukushima, Jun
AU - Hayashi, Yamato
AU - Takizawa, Hirotsugu
PY - 2013/5
Y1 - 2013/5
N2 - The layer-structured thermoelectric material, Al-doped (ZnO) 5In2O3, was fabricated by microwave irradiation within a short time of 15min and its thermoelectric properties were examined. When comparing specimens sintered by microwave irradiation (15 min) with those by conventional heating (4h), their microstructure and composition were similar. However, electrical conductivity was improved by microwave irradiation. Moreover, in (Zn1-xAlxO)5In2O 3 (x = 0.016, 0.032), Al-doping contributed to an increase in both the electrical conductivity and the absolute value of Seebeck coefficient, which contributed fairly to the high dimensionless figure of merit, ZT. Larger ZT was achieved by improvement in electrical conductivity by microwave irradiation and increases in both the electrical conductivity and the absolute value of Seebeck coefficient by Al doping. (Zn0.984Al0.016O) 5In2O3 sintered by microwave irradiation had the highest ZT, which was 1.5 times higher than that of (ZnO)5In 2O3 sintered by conventional heating at 773 K.
AB - The layer-structured thermoelectric material, Al-doped (ZnO) 5In2O3, was fabricated by microwave irradiation within a short time of 15min and its thermoelectric properties were examined. When comparing specimens sintered by microwave irradiation (15 min) with those by conventional heating (4h), their microstructure and composition were similar. However, electrical conductivity was improved by microwave irradiation. Moreover, in (Zn1-xAlxO)5In2O 3 (x = 0.016, 0.032), Al-doping contributed to an increase in both the electrical conductivity and the absolute value of Seebeck coefficient, which contributed fairly to the high dimensionless figure of merit, ZT. Larger ZT was achieved by improvement in electrical conductivity by microwave irradiation and increases in both the electrical conductivity and the absolute value of Seebeck coefficient by Al doping. (Zn0.984Al0.016O) 5In2O3 sintered by microwave irradiation had the highest ZT, which was 1.5 times higher than that of (ZnO)5In 2O3 sintered by conventional heating at 773 K.
KW - Al-doping
KW - Indium oxide
KW - Layer-structured oxide material
KW - Microwave irradiation
KW - Thermoelectric material
KW - Zinc oxide
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U2 - 10.2109/jcersj2.121.416
DO - 10.2109/jcersj2.121.416
M3 - Article
AN - SCOPUS:84878833566
SN - 1882-0743
VL - 121
SP - 416
EP - 421
JO - Journal of the Ceramic Society of Japan
JF - Journal of the Ceramic Society of Japan
IS - 1413
ER -