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Silver doping in lanthanum manganite materials: structural and electrical properties

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Abstract

Ag-doped LaMnO3 nanoparticles have been synthesized through sol–gel process using citric acid as a chelating agent. Silver effect on physicochemical properties was studied. The physicochemical properties and electrical performance of the obtained materials were also investigated, using thermogravimetric analysis (TGA) and X-ray diffraction (XRD) techniques. Thermogravimetric analysis shows that for the studied materials a decomposition stage between 3.7% and 4.1% can be observed, and mass increases from the LMN-Ag1 to the LMN-Ag3 sample. Also, in all those three situations an endothermic process with a maximum around 600 °C is observed. The diffractograms of the perovskite materials showed single-phase crystalline with high purity and rhombohedral structure with R-3c space group. The electrical measurements show that the conductivity spectrum is formed by both the static component σDC corresponding to the low frequencies and the component σAC corresponding to high frequencies. The values of σDC of samples are significantly influenced by the silver ions concentration.

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Acknowledgements

This paper was financially supported by the National Nucleu Project PN 19220201, Ctr. 40N/2019. The authors thank to Maria Poienar (INCEMCT) for their help during the materials’ characterization.

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Authors and Affiliations

  1. National Institute for Research and Development in Electrochemistry and Condensed Matter, Timisoara, P. Andronescu No.1, 300224, Timisoara, Romania

    Paula Sfirloaga & Paulina Vlazan

  2. Research Center for Thermal Analysis in Environmental Problems, West University of Timisoara, Str. Pestalozzi No. 16, 300115, Timisoara, Romania

    Gabriela Vlase & Titus Vlase

  3. West University of Timisoara, Vasile Parvan 4, 300223, Timisoara, Romania

    Iosif Malaescu & Catalin Nicolae Marin

Authors
  1. Paula Sfirloaga
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  2. Gabriela Vlase
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  3. Titus Vlase
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  4. Iosif Malaescu
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  5. Catalin Nicolae Marin
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  6. Paulina Vlazan
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Correspondence to Paula Sfirloaga.

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Sfirloaga, P., Vlase, G., Vlase, T. et al. Silver doping in lanthanum manganite materials: structural and electrical properties. J Therm Anal Calorim 142, 1817–1823 (2020). https://doi.org/10.1007/s10973-020-10095-1

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  • DOI: https://doi.org/10.1007/s10973-020-10095-1

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