Electrical and optical properties of new Pr3+-doped PbWO4 ceramics

• Autorzy: Groń T. , Piątkowska M. , Tomaszewicz E. , Sawicki B. , Urbanowicz P. , Duda H.

Identyfikatory

DOI

10.2478/msp-2018-0080

• Języki publikacji: EN

Abstrakty

EN

Polycrystalline samples of new scheelite-type tungstates, Pb_{1−3x x}Pr_2xWO₄ with 0.0098 ⩽ x ⩽ 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 Pb_{1−3x x}Pr_2xWO₄ 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 × 10⁻⁹ 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.

Słowa kluczowe

EN

scheelite-type structure; optical properties; electrical conductivity; thermoelectric power

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2018
• Tom: Vol. 36, No. 4
• Strony: 530--536
• Opis fizyczny: Bibliogr. 32 poz., rys.

Twórcy

autor

Groń T.

• University of Silesia, Institute of Physics, Uniwersytecka 4, 40-007 Katowice, Poland

autor

Piątkowska M.

• West Pomeranian University of Technology, Faculty of Chemical Technology and Engineering, Department of Inorganic and Analytical Chemistry, Al. Piastów 42, 71-065 Szczecin, Poland

autor

Tomaszewicz E.

• West Pomeranian University of Technology, Faculty of Chemical Technology and Engineering, Department of Inorganic and Analytical Chemistry, Al. Piastów 42, 71-065 Szczecin, Poland

autor

Sawicki B.

• University of Silesia, Institute of Physics, Uniwersytecka 4, 40-007 Katowice, Poland

autor

Urbanowicz P.

• University of Silesia, Institute of Physics, Uniwersytecka 4, 40-007 Katowice, Poland

autor

Duda H.

• University of Silesia, Institute of Physics, Uniwersytecka 4, 40-007 Katowice, Poland

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).