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首页> 外文会议>18th International Conference on Adaptive Structures and Technologies(ICAST 2007) >Novel Characterization Procedure for Single Piezoelectric Fibers
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Novel Characterization Procedure for Single Piezoelectric Fibers

机译：单压电纤维的新型表征方法

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The characterization of the ferroelectric properties of piezoelectric ceramic fibers is paramount for optimizing their manufacturing processes, for quality control purposes, and for modeling the response of components and structures. This article presents a comprehensive procedure for the direct characterization of single piezoelectric ceramic fibers in terms of butterfly and polarization loops. The active circuitry used for reliably collecting the charge generated by a single fiber is presented in full detail. The novel testing procedure was then used to characterize commercially available fibers distributed by Advanced Cerametrics Inc., CeraNova Corp. and Smart Material Corp., respectively and to compare their performance with fibers developed at Empa. Their porosity, grain size and phase composition were investigated to correlate the ferroelectric properties with the microstructure. Fibers supplied by Smart Material Corp. exhibited best ferroelectric performance, in particular highest saturation and remnant polarization and lowest coercive field. Said properties result from a low porosity, a sufficiently large grain size and an optimum phase composition. After removing a surface layer dominated by a rhombohedral phase, Empa-fibers developed maximum average free strains 15% larger than any commercially available fiber. Better controlling the sintering atmosphere thus promises to be the key to very high performance fibers.
机译：压电陶瓷纤维的铁电特性的表征对于优化其制造工艺，进行质量控制以及对组件和结构的响应进行建模至关重要。本文介绍了一种根据蝶形和极化环直接表征单压电陶瓷纤维的综合方法。详细介绍了用于可靠地收集单根光纤产生的电荷的有源电路。然后，使用新颖的测试程序来表征分别由Advanced Cerametrics Inc.，CeraNova Corp.和Smart Material Corp.分销的市售纤维，并将其性能与Empa开发的纤维进行比较。研究了它们的孔隙率，晶粒尺寸和相组成，以将铁电性能与微观结构相关联。 Smart Material Corp.提供的纤维表现出最佳的铁电性能，尤其是最高的饱和度和残余极化度以及最低的矫顽场。所述性质归因于低孔隙率，足够大的晶粒尺寸和最佳的相组成。除去由菱面体相主导的表面层后，Empa纤维的最大平均自由应变比任何市售纤维大15％。因此，更好地控制烧结气氛有望成为高性能纤维的关键。

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