Analysis of the Sr2GdTi2Nb3O15 2 GdTi 2 Nb 3 O 15 ceramic: Investigation into its structural properties and complex impedance spectroscopy

被引：3

作者：

Chourti, Karim ^{[1
]}

Bendahhou, Amine ^{[1
]}

Jalafi, Ilyas ^{[1
]}

Chaou, Fatima ^{[1
]}

El Barkany, Soufian ^{[1
]}

Abou-salama, Mohamed ^{[1
]}

机构：

[1] Univ Mohammed Premier, Fac Multidisciplinary Nador, Dept Chem, Lab Mol Chem Mat & Environm, BP 300, Selouane 62700, Nador, Morocco

来源：

MATERIALIA | 2024年 / 38卷

关键词：

Structure; Electrical properties; Solid-state; X-ray diffraction; Impedance spectroscopy; DIELECTRIC-PROPERTIES; ELECTRICAL-CONDUCTIVITY; AC-CONDUCTIVITY; RELAXATION; MODULUS; SUBSTITUTION; CRYSTAL; CHALCOGENIDE; CONSTANT; RIETVELD;

D O I：

10.1016/j.mtla.2024.102256

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, we successfully synthesized tetragonal tungsten bronze with the nominal formula Sr2GdTi2Nb3O15 2 GdTi 2 Nb 3 O 15 and systematically examined of its structure, dielectric, and electrical properties. The material was synthesized through the solid-state reaction technique at a temperature of 1350 degrees C. The formation of the tetragonal tungsten bronze in the P4/mbm space group was verified via Rietveld refinement using X-ray diffraction data. The electrical characteristics of the ceramic were examined using non-destructive complex impedance spectroscopy (CIS) across a range of frequencies (10-106 6 Hz) at various temperatures. The real component of impedance (Z') displayed a decrease with rising frequency, suggesting a negative temperature coefficient of resistance (NTCR) for this sample. The Cole-Cole plot of the compound exhibits two semicircles, with the compound's resistance gradually decreasing as the temperature increased. Moreover, the activation energy (Ea) a ) was found to be approximately 0.9 eV, which confirms that oxygen vacancies are responsible for the observed relaxation behavior. Complex modulus analysis confirmed the presence of non-Debye relaxations. These results contribute to a thorough comprehension of the structural and electrical characteristics of Sr2GdTi2Nb3O15, 2 GdTi 2 Nb 3 O 15 , opening avenues for potential applications in diverse electronic devices.

引用

页数：10

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