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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
FWHM as a function of temperature for the diffraction peak at 31.5° (101) and for the FWHM ratio of (200)/(002) diffraction peaks. Inset shows the XRD patterns of nano-BT particles at 30 °C and 160 °C respectively. Lines are visual aid.