<abstract xmlns="http://www.w3.org/1999/xhtml">Polycrystalline samples of new scheelite-type tungstates, Pb1−3x xPr2xWO4 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 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 × 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.</abstract>

Polycrystalline samples of new scheelite-type tungstates, Pb1−3x xPr2xWO4 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 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 × 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.

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

Faculty of Chemical Technology and Engineering, Department of Inorganic and Analytical Chemistry

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Electrical and optical properties of new Pr-doped PbWO ceramics

Polycrystalline samples of new scheelite-type tungstates, Pb1−3x xPr2xWO4 with 0.0098 ⩽ x ⩽ 0.20, where denotes cationic vacancies have been successfully...

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

Publié en ligne: 01 févr. 2019

Pages: 530 - 536

Reçu: 13 juin 2016

Accepté: 26 juil. 2018

DOI: https://doi.org/10.2478/msp-2018-0080

Mots clés
scheelite-type structure, optical properties, electrical conductivity, thermoelectric power

© 2018 Tadeusz Groń et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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

Publié en ligne: 01 févr. 2019

Pages: 530 - 536

Reçu: 13 juin 2016

Accepté: 26 juil. 2018

DOI: https://doi.org/10.2478/msp-2018-0080

Mots clésscheelite-type structure, optical properties, electrical conductivity, thermoelectric power

© 2018 Tadeusz Groń et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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

Mots clés
scheelite-type structure, optical properties, electrical conductivity, thermoelectric power