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Processing of La2O3 based rare earth non-linear resistors via combustion synthesis

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Abstract

Non Linear ceramic Resistor (NLR) was processed using ZnO-La2O3 rare earth composition via combustion technique involving urea and glycine as organic fuels. The La2O3 NLR ceramic was sintered at 1300 °C/ 3 h that showed dense microstructures with average grain size of 1 μm. The current v/s voltage characteristics of La2O3 NLR were compared among the fuels. In addition to that the combustion chemistry of urea and glycine was monitored via C-H-N-S analysis and the functional property was assessed by UV-Vis analysis. The I-V analysis confirmed that the La2O3 NLR ceramic prepared with urea fuels exhibits only a linear resistor behavior whereas an excellent non-ohmic nature was obtained in glycine fuels. The grain-grain boundary property was further examined by impedance analysis. The study brought out a promising, eco-friendly rare earth composition for obtaining high-energy NLR ceramics.

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Acknowledgements

The authors are grateful to the Director, National Institute for Interdisciplinary Science & Technology (NIIST), CSIR for providing the necessary facilities for the work. The authors acknowledge Indian Rare Earth Limited (IREL), Kollam, Kerala for Financial Supports. The authors also express their gratitude to Mr. M. Kiran, Mr.C. Chandrakanth, Mr. K. M. Manu and Mr. Vaisakhan Thampi for their technical support.

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Authors and Affiliations

  1. Functional Materials Section, Material Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum, Kerala, India, 695 019

    Sasidharan Pillai Rahul, K. V. Mahesh, S. S. Sujith, Mathews Jeen Maria & S. Ananthakumar

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  1. Sasidharan Pillai Rahul
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  2. K. V. Mahesh
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  3. S. S. Sujith
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  4. Mathews Jeen Maria
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  5. S. Ananthakumar
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Correspondence to S. Ananthakumar.

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Rahul, S.P., Mahesh, K.V., Sujith, S.S. et al. Processing of La2O3 based rare earth non-linear resistors via combustion synthesis. J Electroceram 32, 292–300 (2014). https://doi.org/10.1007/s10832-014-9894-4

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