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您的检索式：作者名="SunQingchi"
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| 1 | STRESS ANALYSIS AND GEOMETRICAL CONFIGURATION SELECTION FOR MULTILAYER PIEZOELECTRIC DISPLACEMENT ACTUATOR显示文摘Multilayer piezoelectric ceramic displacement actuators are susceptible to cracking in the region near the edge of the internal electrode, which may cause system damage or failure. In this paper, the stress distribution of a multilayer piezoelectric composite is investigated in a working environment and the optimized geometrical con?guration of the piezoelectric layer is obtained. The stress distribution in the structure and the stress concentration near the edge of the internal electrode, induced by non-uniform electric ?eld distribution, are analyzed by moir′e interferometry experiment and ?nite element numerical simulation. Based on the above analysis, two optimized geometrical models are presented for the purpose of geometrical con?guration selection, with which stress concentration can be reduced signi?cantly while the feasibility of the machining process and the basic structural functions occurring in the conventional model are retained. The numerical results indicate that the maximum stress in the optimized models is e?ectively diminished compared to the conventional model. For instance, the peak value of the principal stress in the optimized model II is 93.1% smaller than that in the conventional model. It is proved that stress concentration can be e?ectively relaxed in the latter of the two optimized models and thus the probability of fracture damage can be decreased. | QiuWei KangYilan SunQingchi QinQinghua LinYu | 2004 | Acta Mechanica Solida Sinica2004，17，4： | 2 |
| 2 | 显示文摘 | LiHongyuan(李红元) SunQingchi(孙清池) | 2008 | 稀有金属材料与工程2008，37，1： | 1 |
| 3 | Piezoelectric and dielectric properties of Cr-doped PSN-PZN-PZT qua-ternary piezoelectric ceramics显示文摘PSN-PZN-PZT + x wt.%Cr2O3, x = 0.0-0.9, were prepared by conventional mixed oxide techniques at sintering temperatures of 1220°C-1300°C for 2 h. The effect of sintering temperature on the microstructure and the piezoelectric properties was investigated by XRD, SEM, and other conventional measurement. The result indicated that with temperature increasing, the valence of Cr ion from Cr5+ or Cr6+ changes into Cr3+, and the piezoelectric properties turn hard. With ni-creasing Cr2O3 content, the amount of rhombohedral phases increases and the morphotropic boundary phase is correspond-ingly shifts to rhombohedral phase. A uniform microstructure and excellent comprehensive properties were obtained at 1240°C as the amount of Cr2O3 is 0.5 wt.%. | SUNQingchi WANGLifeng LIUPing NIEQiang | 2005 | Rare Metals2005，24，2： | 1 |
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