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所属单位：Shandong University

发表刊物：Journal of Materials Research

摘要：This paper reports the enhanced piezoelectric properties of gadolinium-modified Ca1-xGdxBi2Nb2O9 (CBN-100xGd, where x = 0-0.07) high Curie temperature polycrystalline ferroelectric ceramics. The crystal structure, microstructural morphology, and electrical properties of Gd-modified CBN ceramics are investigated in detail. The results reveal that the Gd-modified CBN ceramics have a pure two-layer Aurivillius-type structure, and exhibit plate-like grains. The resultant Gd-modified CBN ceramics exhibit better piezoelectric and electromechanical properties by comparison with unmodified CBN. The composition of CBN-3Gd exhibits the optimized piezoelectric performance with a high piezoelectric constant d(33) value of 13 pC/N and a high Curie temperature T-c of 947 degrees C. The dc electrical resistivity is significantly enhanced, and that of the CBN-3Gd is 2.45 x 10(7) omega cm at 500 degrees C and 1.53 x 10(6) omega cm at 600 degrees C, which is larger by two orders of magnitude compared with that of unmodified CBN ceramics at the same temperature. Such good electrical properties suggest that the Gd-modified CBN ceramics are promising materials for high-temperature piezoelectric sensor applications.

全部作者：Connie Kang,Rui-Min Hou

第一作者：Juan-Nan Chen

论文类型：期刊论文

通讯作者：Xian Zhao,Chun-Ming Wang

卷号：36

期号：5

页面范围：1086-1096

是否译文：否

发表时间：2021-03-01

收录刊物：SCI