Dielectric and piezoelectric properties of YMnO<Subscript>3</Subscript> modified Bi<Subscript>0.5</Subscript>Na<Subscript>0.5</Subscript>TiO<Subscript>3</Subscript> lead-free piezoelectric ceramics期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Dielectric and piezoelectric properties of YMnO3 modified Bi0.5Na0.5TiO3 lead-free piezoelectric ceramics

Authors:	Changrong Zhou Xinyu Liu Weizhou Li Changlai Yuan

Affiliation:	(1) Department of Information Material Science and Engineering, Guilin University of Electronic Technology, 541004 Guilin, Guangxi, People’s Republic of China;(2) School of Materials Science and Engineering, Guangxi University, 530004 Nanning, Guangxi, People’s Republic of China

Abstract:	Perovskite lead-free piezoelectric ceramics Bi_0.5Na_0.5TiO₃, modified with yttrium and manganese to form a new compound, (1 − x) Bi_0.5Na_0.5TiO₃–xYMnO₃ (BNT-YM100x) with x = 0–1.2 mol%, was synthesized by a conventional solid-state reaction method. The effect of YMnO₃ on crystal structure, dielectric and piezoelectric properties was investigated. X-ray diffraction analysis shows that the materials have a single phase perovskite structure with rhombohedral symmetry. Addition of small amount of YMnO₃ improves piezoelectric properties and the optimal piezoelectric properties of d ₃₃ = 115 pC/N, k _p = 0.207 and Q _m = 260 were obtained at 0.9% YMnO₃ addition. The loss tangent tanδ is approximately constant while Curie temperature decreases with increasing YMnO₃ concentration.

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