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【2月24日】Future Piezo-, Ferro-, Pyro-electric Ceramics - Towards Lead-Free

2016-02-22 15:29  点击:[]

讲座题目:Future Piezo-, Ferro-, Pyro-electric Ceramics - Towards Lead-Free

主 讲 人:Prof. Li Lu, Department of Mechanical Engineering, National University of Singapore,Singapore117575

讲座时间:2016年2月24日(星期三) 上午9:30 – 11:30

讲座地点:A区第八教学楼8104室

主办单位:航空航天学院

In the middle of 18 century two scientists Carolus Linnaeus and Franz Aepinus first observed generation of electric charge with change of temperature from particular materials. Although efforts from Later René Just Haüy and Antoine César Becquerel were not successful, brothers Jacques Curie and Pierre Curie initiated piezoelectric materials with great success. One of big successes in application is until first world war for detection of submarines. One of best piezoelectric ceramics is lead zirconia titanate (PZT) that has dominated the market for over several tenth years since its discovery due to large mechanoelectric conversion. Due to presence of lead in the PZT, all currently used piezoelectric ceramics are toxic and have been prohibited to enter certain countries with enforced regulation. The seminar reports recent work of development of lead-free piezoelectric ceramic that shows high piezoelectricity. With textured-growth piezoelectricity can be further enhanced.

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