| Effect of poling condition on piezoelectric properties of （K0.5Na0.5）NbO3 ceramics |
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| 引用本文： | 杜红亮,唐福生,李智敏,周万城,屈绍波,裴志斌.Effect of poling condition on piezoelectric properties of （K0.5Na0.5）NbO3 ceramics[J].中国有色金属学会会刊,2006,16(B02):462-465. |
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| 作者姓名： | 杜红亮 唐福生 李智敏 周万城 屈绍波 裴志斌 |
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| 作者单位： | [1]State Key Laboratory of Solidification Processing, Northwestem Polytechnical University, Xi＇an 710072, China [2]Key Laboratory of Electronic Materials Research, Ministry of Education, Xi＇an Jiaotong University, Xi＇an 710049, China [3]College of Science, Air Force Engineering University, Xi＇an 710051, China |
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| 基金项目： | Project （10474077） supported by the National Natural Science Foundation of China; Project （2002CB613304） supported by the National Basic Research Program of China |
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| 摘 要： | The lead-free piezoelectric ceramics （K0.5Na0.5）NbO3 （abbreviated as KNN） with the relative density of 97.6% were synthesized by press-less sintering owing to the careful control of processing conditions. The phase structure of KNN ceramics was analyzed. The results show that the pure perovskite phase with orthorhombic symmetry is in all ceramics specimens. The effect of poling conditions on the piezoelectric properties of KNN ceramics was investigated. The results show that the piezoelectric constant d33 and electromechanical coupling factor kp increase with poling field, poling temperature and poling time increasing, then decrease because of electric broken. Take into account of poling conditions and piezoelectric properties of pure KNN ceramics, the optimum poling conditions for pure KNN ceramics are poling field of 4 kV/mm, poling temperature of 140 ℃ and poling time of 20-25 min.
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| 关 键 词： | （K0.5Na0.5）NbO3 无铅压电陶瓷 压电性质 极化条件 |
| 收稿时间： | 2006-04-10 |
| 修稿时间： | 2006-04-25 |
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