IMPROVEMENT IN THERMOELECTRIC PROPERTIES OF CuAlO2 BY ADDING PARTIAL SUBSTITUTION Ca
PDF (Vietnamese)

Keywords

gốm CuAlO2
tạp Ca
nhiệt điện. CuAlO2 ceramics
Ca substitution
thermoelectric

How to Cite

1.
Tùng VT, Tú LTU, Trang DTH, Phương LTL, Hương LTT, Tĩnh NT. IMPROVEMENT IN THERMOELECTRIC PROPERTIES OF CuAlO2 BY ADDING PARTIAL SUBSTITUTION Ca. hueuni-jns [Internet]. 2019Feb.28 [cited 2024Mar.29];128(1A):5-12. Available from: https://jos.hueuni.edu.vn/index.php/hujos-ns/article/view/5069

Abstract

CuAl1-xCaxO2 (0  x  0.2) ceramics were prepared by solid state reaction method. Structure of the sample were investigated by X – ray diffraction patterns; contained the CuAl1-xCaxO2 solid solution with a rhombohedral structure, along with second phases such as CuO, CaO, and CaAl4O7. And their microstructure showed by SEM indicated that Ca caused the increasing of grain sizes. It was found that the substitution of Ca gave an increase in Seebeck coefficient despite the decreasing of the electrical conductivity. The highest value of power factor (5.09×10−5Wm−1K−2) was attained for CuAl0.95Ca0.05O2 sintered at 1423 K. We have demonstrated in this study that Ca addition have an important role to enhance high-temperature thermoelectric properties of CuAlO2.

https://doi.org/10.26459/hueuni-jns.v128i1A.5069
PDF (Vietnamese)

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