副教授 硕士生导师
招生学科专业：
机械 -- 【招收硕士研究生】 -- 航空学院
材料科学与工程 -- 【招收硕士研究生】 -- 材料科学与技术学院
材料与化工 -- 【招收硕士研究生】 -- 材料科学与技术学院
性别：男
毕业院校：日本富山县立大学
学历：博士研究生毕业
学位：工学博士学位
所在单位：航空学院
办公地点：明故宫校区 A8-616
联系方式：江苏省南京市秦淮区御道街29号 南京航空航天大学 航空学院 智能材料与结构研究所
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所属单位：航空学院
发表刊物：Ceram Int
摘要：Understanding the phase structure evolution is important for developing high performance lead-free piezoelectric materials. In this work, the effects of A-site ionic size of monovalent ions on the phase transition behaviors for the lead-free niobate ceramics ANbO3 (A = Li, Na, Ag, and K) are investigated using XRD analysis and dielectric measurement. The iso-valent ionic doping restrains the relaxation behavior that usually appears in the hetero-valent ionic-doped niobate ceramics. The A-site average ionic size of RA and its ionic radius differences of ΔRA are found to be crucial influence factors on the phase transition behaviors of the ANbO3 ceramics. Small Li+ doping stabilize tetragonal phase of the ANbO3 ceramics with RA > 1.47 Å, but stabilize rhombohedral phase of the ones with RA < 1.47 Å. On the other hand, The ANbO3 ceramics without Li+ doping prefer to orthorhombic phase due to indistinctive ionic size differences (ΔRA < 0.25 Å). Our results suggest that a certain phase and phase transition boundary could be designed by appropriate ionic doping for developing the niobate-based lead free piezoelectric ceramics. © 2019 Elsevier Ltd and Techna Group S.r.l.
ISSN号：0272-8842
是否译文：否
发表时间：2019-11-01
合写作者：Wang, Fangfang,Chen, Xinglong,吴大伟,朱孔军
通讯作者：严康
