BiScO3 Doped (Na0.5K0.5)NbO3 Lead‐Free Piezoelectric Ceramics
BiScO3 Doped (Na0.5K0.5)NbO3 Lead‐Free Piezoelectric Ceramics
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DOI：
10.1111/j.1551-2916.2008.02863.x
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发表时间：
2009
影响因子：
3.9
通讯作者：
Xueyi Sun;Jun Chen;R. Yu;Ce Sun;Gui-rong Liu;X. Xing;L. Qiao
中科院分区：
文献类型：
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作者：
Xueyi Sun;Jun Chen;R. Yu;Ce Sun;Gui-rong Liu;X. Xing;L. Qiao
采用普通烧结工艺制备了无铅的KNa_2O_3基压电陶瓷（1-x）（Na0.5K0.5）NbO_3-xBiScO_3（KNN-BS）（x=0 ~ 0.05）。KNN-BS的单一钙钛矿相在x 0.02处表现出正交对称性，在0.015≤x≤0.02处被MPB分开。MPB的压电和铁电性能得到显著提高，其压电常数d33=203 pC/N，平面耦合系数kp=0.36，剩余极化强度Pr=24.4 μC/cm ~ 2。这些固溶体陶瓷是一种很有前途的无铅候选材料。
Lead-free potassium sodium niobate-based piezoelectric ceramics (1−x)(Na0.5K0.5)NbO3–xBiScO3 (KNN–BS) (x=0∼0.05) have been prepared by an ordinary sintering process. Single perovskite phase of KNN–BS exhibits an orthorhombic symmetry at x 0.02, separating by a MPB at 0.015≤x≤0.02. Piezoelectric and ferroelectric properties are significantly enhanced in the MPB, which are as follows: piezoelectric constant d33=203 pC/N, planar coupling coefficient kp=0.36, remnant polarization Pr=24.4 μC/cm2. These solid solution ceramics look promising as a potential lead-free candidate materials.