| Synthesis and Characterization of Ca2.5Ag0.3Pr0.2Co4O9
Semiconducting Materials via Sol-Gel Process for
Thermoelectric Applications |
Enes Kilinc,a, * Fatih Uysal,b
Mucahit Abdullah Sari,c
Huseyin Kurtd
and Erdal Celike, f, g
Pages : 207-218
DOI: 10.1080/0371750X.2025.2532499 |
| Abstract |
| This article presents a study on the synthesis and characterization of
Ca2.5Ag0.3Pr0.2Co4O9
, a p-type semiconducting material, to evaluate its potential for
thermoelectric generator applications. The material is designed by partially
substituting calcium in the Ca3Co4O9
matrix with Ag and Pr, aiming to enhance its
thermoelectric performance using improved electrical conductivity and Seebeck
coefficient. The material is synthesized through a sol-gel method, followed by extensive
structural and morphological characterization through differential thermal analysis-
thermogravimetry (DTA-TG), X-ray diffraction (XRD), X-ray photoelectron spectroscopy
(XPS), scanning electron microscope (SEM) and TM devices. Thermoelectric properties,
including electrical resistivity, Seebeck coefficient and thermal conductivity, are
systematically measured to calculate the material’s figure of merit. The doping of Ag
and Pr leads to an optimized balance between electrical and thermal transport
properties, making Ca2.5Ag0.3Pr0.2Co4O9
a strong candidate for high-temperature
thermoelectric applications, particularly for waste heat recovery and power generation.
The findings from this study demonstrate the material’s potential for enhancing the
efficiency of thermoelectric generators used in challenging operational environments.
[Keywords: Thermoelectrics, Semiconductivity, Sol-gel, Ca2.5Ag0.3Pr0.2Co4O9
] |
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