Disentangling the power transfer process by non-contact optical measurement in nickel-zinc ferrite/piezoelectric magnetoelectric gyrators
Disentangling the power transfer process by non-contact optical measurement in nickel-zinc ferrite/piezoelectric magnetoelectric gyrators
复制标题
DOI：
10.1016/j.jmmm.2020.167680
复制
发表时间：
2021-04
影响因子：
2.7
通讯作者：
Jitao Zhang;Hewei Zhao;Qingfang Zhang;D. Filippov;Jie Wu;Jiagui Tao;Liying Jiang;Lingzhi Cao
中科院分区：
文献类型：
--
作者：
Jitao Zhang;Hewei Zhao;Qingfang Zhang;D. Filippov;Jie Wu;Jiagui Tao;Liying Jiang;Lingzhi Cao
为了准确定位铁氧体/压电微线圈回转器中的主要能量耗散源，采用非接触式光学测量方法对动态磁-机-电转换过程进行了定量分析.对于样品的制造，成功的结晶以及所需的磁性烧结尖晶石铁氧体证实了XRD和SQUID测量。在这一动力学过程中，束缚在铁氧体中的磁能将转化为动能，并伴随着必不可少的耗散，而转化的动能可以用聚焦激光束以振动速度的形式定量测量。结果表明，由于胶粘剂的影响，在三层样品中只有约71%的机械能可以成功地传递到下一层，而双层样品的该值为57%。最后，在三层和双层样品的低频/共振ME相互作用和功率转换效率的比较研究进行了测量，并最终实现了最大PE为80.3%，在最佳负载为3.5 kΩ。我们从结果推断，层间的机械损耗仍然是阻碍能量有效传递的瓶颈。这些发现提供了一个深入的分析，以揭示在ME线圈回转器的动态能量传递，以及一个灵活的途径，ME回转器的设计。
To precisely position the main energy dissipation sources in ferrite/piezoelectric ME-coil gyrators, the dynamic magneto-mechanical-electric conversion process was disentangled quantitatively by employing a non-contact optical measurement methodology. For the sample fabrication, successful crystallization as well as desired magnetic properties for sintered spinel ferrites was confirmed by XRD and SQUIDs measurements. Trapped magnetic energies in ferrites will convert into kinetic energies accompanying indispensable dissipations in this dynamic process, and the converted kinetic energies can be measured quantitatively in the form of vibrating velocity by focused laser beam. As a result, only ~71% of mechanical energies can be transferred successfully to next layer due to the influence of adhesive in tri-layer sample while the value is 57% for bi-layer one. Finally, comparative studies of low-frequency/resonance ME interactions and power conversion efficiency in tri-layer and bi-layer samples were measured, and an eventual maximum PE of 80.3% under optimum load of 3.5 kΩ was achieved. We infer from the results that the mechanical loss between layers is still a bottleneck to block the efficient energy transfer. These findings provide a deep analysis to reveal the dynamic energy transfer in ME-coil gyrators as well as a flexible pathway for ME gyrators design.