三相壓電壓磁纖維複合材料之磁電耦合效應

Magnetoelectric effect of three-phase piezoelectric-piezomagnetic fibrous composites

彭晟祐(Cheng-You Peng)

指導教授 ： 郭心怡

國立交通大學/工學院/土木工程系所/碩士(2012年)

https://doi.org/10.6842/NCTU.2012.00048

摘要

磁電耦合效應由於電場與磁場間之交互影響作用，使得磁電材料在致動器、感測器的發展上備受矚目。然而，單相多鐵性材料的磁電耦合效應太低，不足以應用於工程上，因此，發展出以多鐵性複合材料的方式來提升磁電耦合效應。
本研究以雙層法概念及微觀力學模型Mori-Tanaka模式，配合有限元素法(COMSOL Multiphysics)建立之數值模型驗證下，預測三相壓電壓磁纖維複合材料之磁電耦合效應。過程中，藉由三種不同材料配置於核心、殼層及母材得到磁電效應最佳化配置。另外，由變動材料係數的方式，選擇適當的現有材料來提升磁電效應。由結果得知，在選擇適當材料配置前後磁電耦合效應皆有顯著之提升，且部分的提升配置由三相材料所控制。另外，本文嘗試以殼層置入一材料的方式，模擬非完美交界面之現象，並由選擇適當之界面相材料分析後，證實其可行。

關鍵字

磁電效應 ； 多鐵性材料 ； 壓電壓磁複合材料 ； Mori-Tanaka模式 ； 有限元素法 ； 雙層法 ； 非完美交界面

並列摘要

Magnetoelectric (ME) effects refer to the interaction between electric and magnetic fields, which makes ME materials in actuators and sensors on the development of attention. However, the magnetoelectric effect is weak in single phase multiferroic materials. Therefore, we resort to the multiferroic composites of core-shell-matrix three-phase fibrous to enhance the magnetoelectricity.
In this work, we propose a micromechanical model, the two-level recursive scheme in conjuction with Mori-Tanaka’s method, to investigate the effective magnetoelectric coupling coefficients of the composite. We compare this micromechanical solution with those predicted by finite element analysis (COMSOL Multiphysics), which provides the benchmark results for a periodic array of inclusions. Both the magnitudes and trends between them are in good agreement. Based on this micromechanical approach, by choosing the appropriate materials before and after the configuration is a significant rise of the magnetoelectric effects, and some optimization is controlled by the three-phase material. In addition, we show that this three-phase core-shell-matrix model can be used to estimate the behavior of composites with imperfect interfaces, and selecting the suitable interphase materials confirmed its feasible.

並列關鍵字

Magnetoelectricity ； Multiferroics ； Piezoelectric-piezomagnetic composites ； Mori-Tanaka Method ； Finite Element Analysis ； Two-level Recursive Scheme ； Imperfect Interface

參考文獻

[3] 齊孝定, "多鐵性(multiferroic)材料的發展及潛在應用," 物理雙月刊, vol. 31, pp. 461-467, 2009.

[4] 楊展其, et al., "多鐵材料物理鉍鐵氧之磁電耦合與應用," 物理雙月刊, vol. 31, pp. 468-475, 2009.

[5] 李振民 and 陳錦明, "多鐵材料TbMnO3電子結構之異向性," 物理雙月刊, vol. 31, pp. 508-515, 2009.

[6] S. Priya, et al., "Recent advancements in magnetoelectric particulate and laminate composites," Journal of Electroceramics, vol. 19, pp. 149-166, Sep 2007.

[7] C. W. Nan, et al., "Multiferroic magnetoelectric composites: Historical perspective, status, and future directions," Journal of Applied Physics, vol. 103, Feb 1 2008.