掺杂铝离子和镍离子的氧化锌的热电特性

IF 0.8 Q3 Engineering Nanotechnologies in Russia Pub Date : 2024-09-10 DOI:10.1134/S2635167624600937
E. V. Chernyshova, E. A. Kolesnikov, F. Yu. Bochkanov, E. V. Argunov, A. I. Voronin, V. V. Khovaylo
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摘要

摘要 本文采用化学共沉淀法合成了一种热电材料,其标称成分为 Zn0.97Al0.02Ni0.01O。合成的粉末由主相乌兹石和少量 Ni1-znzO 组成;主相晶格参数的变化表明 Al3+ 取代了 Zn2+。Ni1-znzO 相主要位于晶界,在火花等离子烧结过程中阻碍了晶界的生长。由此产生的形貌增强了声子散射过程,导致热导率下降。由于电荷载流子的浓度随着 Zn2+/Al3+ 的替代而增加,因此与未掺杂的氧化锌相比,电导率表现出活化行为并显著增加。因此,通过化学共沉淀方法可以获得掺杂氧化锌,其热电性能比未掺杂氧化锌提高 2 倍以上。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Thermoelectric Properties of Zinc Oxide Doped with Aluminum and Nickel Ions

In this work, a thermoelectric material with the nominal composition Zn0.97Al0.02Ni0.01O is synthesized using the chemical coprecipitation method. The synthesized powder consists of the main phase of wurtzite with a small content of Ni1–zZnzO; the change in the crystal-lattice parameters of the main phase indicates the replacement of Zn2+ with Al3+. The Ni1–zZnzO phase is predominantly located at the grain boundaries, blocking their growth during spark-plasma sintering. The resulting morphology enhances phonon scattering processes, which leads to a decrease in thermal conductivity. The electrical conductivity exhibits activation behavior and increases significantly in comparison with undoped ZnO, because the concentration of charge carriers increases with the substitution of Zn2+/Al3+. Thus, the chemical coprecipitation method allows one to obtain doped ZnO with an increase in thermoelectric performance of more than 2 times relative to undoped ZnO.

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来源期刊
Nanotechnologies in Russia
Nanotechnologies in Russia NANOSCIENCE & NANOTECHNOLOGY-
CiteScore
1.20
自引率
0.00%
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0
期刊介绍: Nanobiotechnology Reports publishes interdisciplinary research articles on fundamental aspects of the structure and properties of nanoscale objects and nanomaterials, polymeric and bioorganic molecules, and supramolecular and biohybrid complexes, as well as articles that discuss technologies for their preparation and processing, and practical implementation of products, devices, and nature-like systems based on them. The journal publishes original articles and reviews that meet the highest scientific quality standards in the following areas of science and technology studies: self-organizing structures and nanoassemblies; nanostructures, including nanotubes; functional and structural nanomaterials; polymeric, bioorganic, and hybrid nanomaterials; devices and products based on nanomaterials and nanotechnology; nanobiology and genetics, and omics technologies; nanobiomedicine and nanopharmaceutics; nanoelectronics and neuromorphic computing systems; neurocognitive systems and technologies; nanophotonics; natural science methods in a study of cultural heritage items; metrology, standardization, and monitoring in nanotechnology.
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