Scholarlink

<p>In the area of thermoelectric implementation, the development of thermoelectric materials takes a crucial role, especially in areas with substantial thermal differentials, aiming to convert these differentials into electrical signals. This study systematically describes the production and characterization of Ca<sub>2.7−x</sub>Ag<sub>0.3</sub>Eu<sub>x</sub>Co<sub>4</sub>O<sub>9</sub> materials for use in thermoelectric applications, necessitating robust systems capable of harnessing temperature differences for power generation. These ceramics are synthesized using the sol–gel technique using precursor materials. After the gelation process, the obtained xerogel was desiccated and calcined to acquire the final Ca<sub>2.7−x</sub>Ag<sub>0.3</sub>Eu<sub>x</sub>Co<sub>4</sub>O<sub>9</sub> bulk materials. Comprehensive characterization, encompassing thermal, structural, microstructural, and thermoelectric characteristics, is performed with methods such as XRD, DTA-TG, XPS, FTIR, SEM, and thermoelectric measuring instruments. XRD and XPS results confirmed the crystalline nature of the synthesized Ca<sub>2.7−x</sub>Ag<sub>0.3</sub>Eu<sub>x</sub>Co<sub>4</sub>O<sub>9</sub> ceramic powders and verified the inscription of Eu and Ag dopants into Ca<sub>3</sub>Co<sub>4</sub>O<sub>9</sub> ceramic powder materials, illustrating the successful fabrication of <i>p</i>-type thermoelectric materials. Thermoelectric results showed that electrical resistivity and the Seebeck coefficient were measured as 9.39&#xa0;mΩcm, and 242.15&#xa0;µV/K respectively, which yields a maximum power factor of 0.62&#xa0;smW/mK<sup>2</sup> at 800°C. According to these results, the study determines that the manufactured semiconducting ceramic materials illustrate high performance for high-performance thermoelectric generator fabricating.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Synthesis and Characterization of Ca2.7−xAg0.3EuxCo4O9 Semiconducting Materials for Thermoelectric Generators

  • 期刊论文

  • 发表日期：

    2025年10月6日

查看全文
  • Mucahit Abdullah Sarı,
  • Enes Kilinc,
  • Fatih Uysal,
  • Huseyin Kurt,
  • Erdal Celik

摘要

In the area of thermoelectric implementation, the development of thermoelectric materials takes a crucial role, especially in areas with substantial thermal differentials, aiming to convert these differentials into electrical signals. This study systematically describes the production and characterization of Ca2.7−xAg0.3EuxCo4O9 materials for use in thermoelectric applications, necessitating robust systems capable of harnessing temperature differences for power generation. These ceramics are synthesized using the sol–gel technique using precursor materials. After the gelation process, the obtained xerogel was desiccated and calcined to acquire the final Ca2.7−xAg0.3EuxCo4O9 bulk materials. Comprehensive characterization, encompassing thermal, structural, microstructural, and thermoelectric characteristics, is performed with methods such as XRD, DTA-TG, XPS, FTIR, SEM, and thermoelectric measuring instruments. XRD and XPS results confirmed the crystalline nature of the synthesized Ca2.7−xAg0.3EuxCo4O9 ceramic powders and verified the inscription of Eu and Ag dopants into Ca3Co4O9 ceramic powder materials, illustrating the successful fabrication of p-type thermoelectric materials. Thermoelectric results showed that electrical resistivity and the Seebeck coefficient were measured as 9.39 mΩcm, and 242.15 µV/K respectively, which yields a maximum power factor of 0.62 smW/mK2 at 800°C. According to these results, the study determines that the manufactured semiconducting ceramic materials illustrate high performance for high-performance thermoelectric generator fabricating.