Tuning the Piezoelectric Performance of K 0.5 Na 0.5 NbO 3 through Li Doping: Insights from Structural, Elastic and Electronic Analyses.

Autor:	Li, Hui, Zhou, Tianxiang, Xu, Kang, Wang, Han, Lu, Wenke, Liu, Jinyi
Předmět:	POISSON'S ratio ELASTIC analysis (Engineering) ELASTICITY MODULUS of rigidity YOUNG'S modulus BULK modulus
Zdroj:	Materials (1996-1944); May2024, Vol. 17 Issue 9, p2118, 13p
Abstrakt:	The structural, elastic, piezoelectric, and electronic properties of Li-doped K0.5Na0.5NbO3 (K0.5−xNa0.5−yLix+yNbO3, KNN-L) are calculated. The properties of KNN-L are related to the Li-doping content and the replaced K or Na atoms. The bulk modulus, the shear modulus, and Young's modulus of KNN-L are mostly higher than those of KNN, and the hardness value increases. The Poisson ratio of KNN-L is lower than that of most KNN, and the ductility is reduced. All doped structures are direct band gap semiconductors. K0.5Na0.375Li0.125NbO3 has the largest piezoelectric charge constant, d33 = 44.72 pC/N, in the respective structures, which is 1.5 fold that of K0.5Na0.5NbO3 (29.15 pC/N). The excellent piezoelectric performance of Li-doping KNN-L was analyzed from the insights of elastic and electronic properties. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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