Szczegóły publikacji
Opis bibliograficzny
Improvement of thermoelectric properties of $Cu_{2}Se$ superionic thermoelectric materials with $B_{4}C$ micro inclusions / P. NIERODA // Ceramics International ; ISSN 0272-8842. — Tytuł poprz.: Ceramurgia International ; ISSN: 0390-5519. — 2025 — vol. 51 iss. 22 Pt. A, s. 35337–35344. — Bibliogr. s. 35343–35344, Abstr. — Publikacja dostępna online od: 2025-05-17
Autor
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 162044 |
|---|---|
| Data dodania do BaDAP | 2025-09-08 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.ceramint.2025.05.254 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Ceramics International |
Abstract
The work aimed to obtain Cu2Se copper selenide with B4C boron carbide micro inclusions with improved thermoelectric properties compared to pure copper(I) selenide. Both Cu2Se and B4C were synthesized and then mixed and the powders with composition (Cu2Se)1-x(B4C)x, where x = 0, 0.005, 0.01, 0.02 and 0.04 were sintered using the SPS technique. Density of sinters measured by hydrostatic method decreases from ρ = 6.72 g⋅cm−3 for x = 0 to ρ = 6.55 g⋅cm−3 for x = 0.04. The phase and chemical compositions were examined using X-ray diffraction (XRD), Scanning electron microscopy (SEM), which showed that the obtained boron carbide powder has grain sizes in the range of about 0.5 – 1.3 μm and in the sinters their sizes are in the range of approx. 0.5 – 2.5 μm. Transmission electron microscopy (TEM) showed multiphase nature of the B4C material. Thermoelectric homogeneity was investigated by scanning thermoelectric microprobe (STM), which showed a unimodal distribution of the Seebeck coefficient for samples without and with B4C addition. Measurements of thermoelectric transport properties, i.e. electrical conductivity, Seebeck coefficient and thermal conductivity were carried out in the temperature range from 300 to 965 K. Thermal conductivity determined based on thermal diffusivity measurement and specific heat determined by LFA method for all samples with B4C addition are lower than in the case of pure Cu2Se. The ZT parameter was determined for all samples and the highest value of ZTmax = 1.31 was obtained for a sample with composition (Cu2Se)0.98(B4C)0.02 which is 20% higher than for pristine Cu2Se (ZTmax = 1.09).
