摘要
采用传统陶瓷工艺制备了(Ag_(0.75)Li_(0.1)Na_(0.1)K_(0.05))(Nb_(1-x)Sb_x)O_3(x=0~0.10)系无铅压电陶瓷,研究了Sb含量变化对陶瓷的相结构、显微结构和电性能的影响。结果表明:在所研究组成范围内陶瓷均形成了单一钙钛矿结构,当x=0.03~0.06时陶瓷存在正交-伪立方两相共存区;Sb^(5+)的引入使陶瓷的晶粒尺寸有所减小,当x=0.04~0.06时陶瓷晶粒尺寸较为均匀(1~2μm)。陶瓷压电常数d_(33)和机电耦合系数k_p随Sb含量增加均先增大后减小,d_(33)和k_p分别在x=0.04和0.05时达到最大值68 p C/N和26.0%。Sb^(5+)的引入使陶瓷的居里温度有所降低,铁电相变得更加不稳定。
（Ag_（0.75）Li_（0.1）Na_（0.1）K_（0.05））（Nb_（1-x）Sb_x）O_3（x=0 ～ 0.10） lead-free piezoelectric ceramics were prepared by the conventional mixed-oxide method. The effects of the Sb content on the phase structure, microstructure, and electrical properties of the ceramics were investigated. Results show that the ceramics are single-phase perovskite structure for the studied compositions in present work. The coexistence of two phases between orthorhombic and pseudo-cubic is formed when x=0.03 ～ 0.06. The grain size of the ceramics decreases with increasing x. When x=0.04 ～ 0.06, the grain size is relatively uniform, which is about 1 ～ 2 μm. As x increases, both the piezoelectric constant d_（33） and the planar electromechanical coupling factor kp increase initially and then decrease, reach the maximum values of 68 p C/N at x=0.04 and 26% at x=0.05, respectively. Moreover, the Curie temperature of the ceramics was reduced and the ferroelectric phase becomes less stable after the addition of Sb^（5＋）.
出处
《中国陶瓷》
CAS
CSCD
北大核心
2016年第7期25-28,共4页
China Ceramics
基金
四川省教育厅项目(11ZB109)
