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| Origin of high mechanical quality factor in CuO-doped （K,Na）NbO3-based ceramics | |
| 作者姓名： | Wen-Feng LIANG ;Ding-Quan XIAO ;Jia-Gang WU ;Wen-Juan WU ;Jian-Guo ZHU |
| 作者单位： | [1]Department of Materials Science, Sichuan University, Chengdu 610064, China; [2]CAEP Key Laboratory of Neutron Physics, Mianyang 621900, China; [3]Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China |
| 基金项目： | Acknowledgements This work was supported by the National Natural Science Foundation of China （NSFC; Grant Nos. 11305152, 51272164, 50772068 and 50972095） and Foundation of Doctor Training Program in University and College in China （Grant Nos. 20030610035 and 20080610020）. |
| 摘 要： | The origin of a high mechanical quality in CuO-doped （K, Na）NbO3-based ceramics is addressed by considering the correlations between the lattice positions of Cu ions and the hardening effect in K0.48Na0.52＋xNbO3-0.01CuO ceramics. The Cu ions simultaneously occupy K/Na and Nb sites of these ceramics with x = 0 and 0.02, only occupy the K/Na site of the ceramics with x= -0.02, and mostly form a secondary phase of the ceramics with x = -0.05. The Cu ions lead to the hardening of ceramics with an increase of Ec and Qm by only occupying the K/Na site, together with the formation of double hysteresis loops in un-poled compositions. A defect model is proposed to illuminate the origin of a high Qm value, that is, the domain stabilization is dominated by the content of relatively mobile O2- ions in the ceramics, which has a weak bonding with CUK/Na defects. |
| 关 键 词： | 机械品质因数 CuO 陶瓷 原点 Na 掺杂 钠 钾 |
Origin of high mechanical quality factor in CuO-doped (K,Na)NbO3-based ceramics |
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| Authors: | Wen-Feng Liang Ding-Quan Xiao Jia-Gang Wu Wen-Juan Wu Jian-Guo Zhu |
| Affiliation: | 1. Department of Materials Science, Sichuan University, Chengdu, 610064, China 2. CAEP Key Laboratory of Neutron Physics, Mianyang, 621900, China 3. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900, China |
| Abstract: | lead-free piezoelectric ceramic （K, Na）NbO3 （KNN） mechanism of hard-ening effect mechanical quality factor Qm domain stabilization |
| Keywords: | lead-free piezoelectric ceramic （K Na）NbO3 （KNN） mechanism of hard-ening effect mechanical quality factor Qm domain stabilization |
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