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摘要: 研究了冲击波对PZT-95/5压电陶瓷的活化改性作用，对PZT-95/5粉末及块状材料进行动态冲击波加载。实验表明：在合适的条件下，冲击波作用可提高样品的密度，压电应变常数d33，介电常数，降低介电耗损系数tg %。通过对样品进行X射线衍射，扫描电镜SEM、透射电镜TEM和X射线光电子能谱XPS等微观测试分析，揭示了冲击波改性的机理主要是：晶粒细化，晶界破坏，孔隙增多，缺陷增多，相变产生等，从而达到对样品改性的作用。Abstract: This paper is about shock activation and modification of PZT-95/5 ceramics. The shock loading experiments of PZT-95/5 powder and block samples show that: in suitable conditions, the density (), piezoelectric strain constant (d33) and dielectric constant () of the samples can be increased and dielectric lost coefficient (tg %) be reduced. The results of X-ray diffraction, Scan Electronic Microscope and Transmission Electronic Microscope measurement are also given. It is concluded that the mechanism of activation can be attributed to pulverization of crystallites, crystal boundary damage, microcracks, defects increase and phase changed etc.
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Key words:
- PZT-95/5 piezoceramics /
- shock /
- activation modification /
- X-ray diffraction /
- SEM /
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