http://hdl.handle.net/20.500.12128/8118
Tytuł: | Electrical and optical properties of new Pr3+-doped PbWO4 ceramics |
Autor: | Groń, Tadeusz Piątkowska, Magdalena Tomaszewicz, Elżbieta Sawicki, Bogdan Urbanowicz, Piotr Duda, Henryk |
Słowa kluczowe: | scheelite-type structure; thermoelectric power; optical properties; electrical conductivity |
Data wydania: | 2018 |
Źródło: | Materials Science- Poland, Vol. 36, iss. 4 (2018), s. 530-536 |
Abstrakt: | Polycrystalline samples of new scheelite-type tungstates, Pb1 3x xPr2xWO4 with 0.0098 6 x 6 0.20, where denotes cationic vacancies have been successfully prepared by a high-temperature solid-state reaction method using Pr2(WO4)3 and PbWO4 as the starting reactants. The influence of the Pr3+ substitution in the scheelite framework on the structure and optical properties of prepared new ceramic materials has been examined using powder X-ray diffraction method (XRD) and UV-Vis-NIR spectroscopy. The results of dielectric studies of Pb1 3x xPr2xWO4 samples showed both low values of dielectric constant (below 14) and loss tangent (below 0.2). The electrical conductivity and thermoelectric power measurements revealed a low conductivity ( 2 × 109 S/m) and the sign change of thermoelectric power around the temperature of 366 K suggesting the p-n transition. These results are discussed in the context of vacancy, acceptor and donor levels as well as the Maxwell-Wagner model. |
URI: | http://hdl.handle.net/20.500.12128/8118 |
DOI: | 10.2478/msp-2018-0080 |
ISSN: | 2083-134X |
Pojawia się w kolekcji: | Artykuły (WNŚiT) |
Plik | Opis | Rozmiar | Format | |
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Gron_Electrical_optical_properties_of_new.pdf | 1,85 MB | Adobe PDF | Przejrzyj / Otwórz |
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