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Journal of Materials Science: Materials in Electronics

, Volume 28, Issue 24, pp 18873–18878 | Cite as

Preparation, structure and electrical properties of La1−xBaxCrO3 NTC ceramics

  • Mingxing Chen
  • Huimin ZhangEmail author
  • Ting Liu
  • Hui Jiang
  • Aimin Chang
Article
  • 159 Downloads

Abstract

The La1−xBaxCrO3 (x = 0–0.2) negative temperature coefficient (NTC) ceramics have been prepared by the traditional solid-state reaction method at 1600 °C. Scanning electron microscope images show that the doping of Ba2+ contributes to the increase in the density. X-ray diffraction analysis has revealed that the sintered ceramics crystallize in a single perovskite structure. X-ray photoelectron spectroscopy analysis confirm the existence of Cr3+ and Cr6+ ions on lattice sites, which result in hopping conduction. The presence of the Cr3+ and Cr6+ ions is one of the significant factors that affect the electrical conductivity of La1−xBaxCrO3 ceramics. The resistance of NTC thermistors decreases with the increase of Ba content as a result of the enhancement of Cr6+ Concentration. The obtained values of ρ −50, B −50/−25 and E a are in the range of 49.278–1.9839 × 105 Ω cm, 1767.4–3496.9 K, 0.1523–0.3013 eV, respectively.

Notes

Acknowledgements

This study was supported by the Autonomous Region Youth Science and Technology Innovation Personnel Training Project (No. QN2015JQ010).

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Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  • Mingxing Chen
    • 1
    • 2
  • Huimin Zhang
    • 1
    Email author
  • Ting Liu
    • 1
    • 2
  • Hui Jiang
    • 1
  • Aimin Chang
    • 1
  1. 1.Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Key Laboratory of Electronic Information Materials and DevicesXinjiang Technical Institute of Physics & Chemistry of CASUrumqiChina
  2. 2.University of Chinese Academy of SciencesBeijingChina

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