Szczegóły publikacji
Opis bibliograficzny
Gamma-argyrodite structure material for thermoelectric conversion and the method of obtaining the same / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie ; wynalazca: WOJCIECHOWSKI Krzysztof, PARASHCHUK Taras, CHERNIUSHOK Oleksandr. — Int.Cl.: C01B 33/00(2006.01). — European Patent Office. — Opis zgłoszeniowy wynalazku ; EP4292982A1 ; Opubl. 2023-12-20. — Zgłosz. nr EP22211900A z dn. 2022-12-07
Autorzy (3)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 151442 |
|---|---|
| Data dodania do BaDAP | 2024-01-21 |
| Tekst źródłowy | URL |
| Rok publikacji | 2023 |
| Typ publikacji | zgłoszenie patentowe |
| Otwarty dostęp |  |
Abstract
The material with the γ-argyrodite structure for thermoelectric conversion is characterized by the chemical formula of Cu8-δSiSxSe6-x for x = 0 ÷ 6 and δ = 0 ÷ 0.5.The method of obtaining a material with the γ-argyrodite structure for thermoelectric conversion is characterized by the fact that vacuum encapsulation is carried out, during which the elements Cu, Si, S, and Se of high purity above 99.99% are weighed in atomic ratios Si : Cu : S : Se - 1 : 7.5÷8 : 0÷6 : 0÷6, with the total amount of S and Se being 6 times the amount of Si, after which the elements are mixed and sealed in a reactor. Next, a melting process is carried out, during which the batch is heated to a temperature in the range of 1200-1600 K and kept at this temperature for at least 5 hours, to allow liquid synthesis to take place, after which the batch is cooled in free mode to room temperature. Subsequently, an annealing heat treatment process is carried out, during which the previously formed batch is ground into powder, which is cold pressed and annealed for 20-1000 hours at 700-1000 K under vacuum, after which it is subjected to free cooling to room temperature to obtain a homogeneous material. Finally, a pressure-assisted sintering process is carried out, during which the annealed material is ground into a fine powder, which is placed in a graphite mold and heated to a temperature of 900-1100 K, and densified at a pressure of 20-200 MPa, for 10-600 minutes, after which the material is slowly cooled at a cooling rate of 1-30 K/min. Heating of the annealed material ground into a fine powder, during the pressure-assisted sintering process, is carried out by the spark plasma sintering (SPS) method.
