Negative thermal expansion property of Er sub(0.7)Sr sub(0.3)NiO sub(3 - delta )

A new kind of negative thermal expansion (NTE) material of Er sub(0.7)Sr sub(0.3)NiO sub(3 - delta ) is synthesized by solid-state method and investigated. It is found that Er sub(0.7)Sr sub(0.3)NiO sub(3 - delta ) crystallizes in orthorhombic structure with rod-shaped grains. Ceramic Er sub(0.7)Sr...

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Published inPhysics letters. A Vol. 378; no. 28-29; pp. 1909 - 1912
Main Authors Fu, Linjie, Chao, Mingju, Chen, He, Liu, Xiansheng, Liu, Yaming, Yu, Jumei, Liang, Erjun, Li, Yucheng, Xiao, Xiao
Format Journal Article
LanguageEnglish
Published 01.05.2014
Subjects
Ceramics
Crystallization
Differential scanning calorimetry
Diffraction
Solid state physics
Temperature dependence
Thermal expansion
X-rays
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Summary:A new kind of negative thermal expansion (NTE) material of Er sub(0.7)Sr sub(0.3)NiO sub(3 - delta ) is synthesized by solid-state method and investigated. It is found that Er sub(0.7)Sr sub(0.3)NiO sub(3 - delta ) crystallizes in orthorhombic structure with rod-shaped grains. Ceramic Er sub(0.7)Sr sub(0.3)NiO sub(3 - delta ) exhibits NTE coefficient of -39.010 super(-6) K super(-1)-39.010-6 K-1 from 655 to 780 K. The results of X-ray diffraction, temperature dependence of Raman spectroscopy and differential scanning calorimetry (DSC) suggest that the NTE phenomenon relates to its phase transition from orthorhombic to rhombohedral.
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ISSN:0375-9601
DOI:10.1016/j.physleta.2014.04.040