Next Article in Journal
Understanding the Stress Relaxation Behavior of Polymers Reinforced with Short Elastic Fibers
Previous Article in Journal
Effect of Partial Crystallization on the Structural and Luminescence Properties of Er3+-Doped Phosphate Glasses
Article Menu
Issue 5 (May) cover image

Export Article

Open AccessArticle
Materials 2017, 10(5), 476; doi:10.3390/ma10050476

Synthesis and Thermochromic Properties of Cr-Doped Al2O3 for a Reversible Thermochromic Sensor

1
Department of Civil Engineering, Pusan National University (PNU), 30 Jangjeon-dong, Geumjeong-gu, Busan 46241, Korea
2
Department of Materials Science and Engineering, Pusan National University (PNU), 30 Jangjeon-dong, Geumjeong-gu, Busan 46241, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Wolfgang Linert
Received: 15 March 2017 / Revised: 19 April 2017 / Accepted: 26 April 2017 / Published: 28 April 2017
View Full-Text   |   Download PDF [4595 KB, uploaded 28 April 2017]   |  

Abstract

An inorganic thermochromic material based on Cr-doped Al2O3 is synthesized using a solid-state method. The crystal structure, chemical composition, and morphology of the synthesized material are analyzed using X-ray diffraction, scanning electron microscopy coupled with an energy-dispersive X-ray spectrometer, and Fourier transform infrared (FT-IR) spectroscopy. The color performances of the synthesized material are analyzed using a UV-VIS spectrometer. Finally, the thermochromism exhibited by the powdered samples at high temperatures is investigated. The material exhibits exceptional thermochromic property, transitioning from pink to gray or green in a temperature range of 25–600 °C. The change in color is reversible and is dependent on the surrounding temperature and chromium concentration; however, it is independent of the exposure time. This novel property of Cr-doped Al2O3 can be potentially employed in reversible thermochromic sensors that could be used not only for warning users of damage due to overheating when the environmental temperature exceeds certain limits, but also for detecting and monitoring the temperature of various devices, such as aeronautical engine components, hotplates, and furnaces. View Full-Text
Keywords: reversible thermochromic sensors; Cr-doped alumina; thermochromic materials; thermochromism reversible thermochromic sensors; Cr-doped alumina; thermochromic materials; thermochromism
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Nguyen, D.K.; Lee, H.; Kim, I.-T. Synthesis and Thermochromic Properties of Cr-Doped Al2O3 for a Reversible Thermochromic Sensor. Materials 2017, 10, 476.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top