通过火花等离子烧结加工的铜氧化物 CuO 和 Cu2O--电气特性和光激活导电性能

IF 2.7 4区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Boletin de la Sociedad Espanola de Ceramica y Vidrio Pub Date : 2024-11-01 DOI:10.1016/j.bsecv.2024.07.003

Pavel Ctibor , Libor Straka , František Lukáč , Josef Sedláček , Iva Králová

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引用次数: 0

摘要

用火花等离子烧结法（SPS）压制了由两种铜氧化物制成的商用粉末。在广泛的频率和温度范围内研究了它们的介电性能。记录了各种弛豫现象。还测量了直流电阻率。对微观结构和相组成进行了研究，结果表明 CuO 具有相纯度，而 Cu2O 对 SPS 处理过程中的碳污染更为敏感。烧结温度对这两种材料的微观结构和电性能的影响也得到了描述。从电学角度来看，CuO 和 Cu2O 之间的总体差异并不像化学计量学所显示的那么大。两种材料都表现出巨大的介电常数，但与频率和温度的关系极为密切。这种系统主要应用于传感器领域。

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Copper oxides CuO and Cu2O processed by spark plasma sintering—Electrical characterization and photo-activated conductivity

Commercial powders made of two copper oxides were compacted with spark plasma sintering (SPS). Their dielectric properties were studied in a broad range of frequencies and temperatures. Various relaxation phenomena were documented. DC resistivity was measured as well. Microstructure and phase composition were studied, and phase purity was shown for CuO, whereas Cu₂O was more sensitive to carbon contamination during the SPS processing. Influence of the sintering temperature on microstructure and electrical properties was described for both materials. Change of DC resistivity induced by visible light irradiation was monitored for 48 h. The overall difference between CuO and Cu₂O from the electrical standpoint was finally not so dramatic as the stoichiometry indicated. Both materials exhibited giant permittivity, but extremely dependent on frequency and temperature. Application could find such systems mainly in the branch of sensors.

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来源期刊

Boletin de la Sociedad Espanola de Ceramica y Vidrio 工程技术-材料科学：硅酸盐

CiteScore

5.50

自引率

2.90%

发文量

审稿时长

103 days

期刊介绍： The Journal of the Spanish Ceramic and Glass Society publishes scientific articles and communications describing original research and reviews relating to ceramic materials and glasses. The main interests are on novel generic science and technology establishing the relationships between synthesis, processing microstructure and properties of materials. Papers may deal with ceramics and glasses included in any of the conventional categories: structural, functional, traditional, composites and cultural heritage. The main objective of the Journal of the Spanish Ceramic and Glass Society is to sustain a high standard research quality by means of appropriate reviewing procedures.