Properties of B-site non-stoichiometric (K0.5Na0.5)(Nb0.9Ta0.1)1+
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- 作者：Juan Du (1)
Limei Zheng (2)
Zhijun Xu (1)
Ruiqing Chu (1)
Xiujie Yi (1) - 刊名：Journal of Materials Science: Materials in Electronics
- 出版年：2014
- 出版时间：February 2014
- 年：2014
- 卷：25
- 期：2
- 页码：1085-1088
- 全文大小：507 KB
- 作者单位：Juan Du (1)
Limei Zheng (2)
Zhijun Xu (1)
Ruiqing Chu (1)
Xiujie Yi (1)
1. School of Materials Science and Engineering, Liaocheng University, Liaocheng, 252059, China
2. Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin, 150001, China - ISSN：1573-482X
文摘
The non-stoichiometric (K0.5Na0.5)(Nb0.9Ta0.1)1+x O3 (x?=?0, ±0.005, ±0.010) [KN(NT)1+x ] lead-free piezoelectric ceramics were prepared by normal sintering. The samples were characterized by X-ray diffraction and scanning electron microscopy. All the KN(NT)1+x ceramics possess orthorhombic perovskite structure. The grain growth of the ceramics is inhibited and the relative density is improved with increasing x. 0.5?mol% (NT)5+ excess KN(NT)1+x ceramic which sintered at 1,120?°C has the highest piezoelectric performances among with other samples. Meanwhile, the (NT)5+ excess ceramics have better time stability than the (NT)5+ deficient ones. These results show that the KN(NT)1+x ceramic with x?=?0.005 is a promising lead-free piezoelectric material.