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Development Of Multi-Ferroic Actuator/Sensor Material And Device for Intelligent/Smart Technology --- Baisc Design And Experimantal Verification--- Yasubumi Furuya1 , Teiko Okazaki2 Faculty of Science and Technology, Hirosaki University 3, Bunkyo-cho, Hrosaki-shi, 036-8560, Japan, 1 furuya@cc.hirosaki-u.ac.jp , 2 teiko28@cc.hirosaki-u.ac.jp Key Words: Multi-ferroic effect, Multifunctional Material, Composite Actuator, Smart materials, SAW Device Sensor, Abstract.
Introduction An ideal actuator/sensor material has high response, high strength, large displacement, and high energy conversion efficiency and smartness having a sensor/actuator functions simultaneously. [1] [2] As one of such a high performance and multi-functional materials and devices, the category of multi-ferroics materials is gathering strong interest in material science and engineering field.[3] The basic concept and category of ferroic and multi-ferric materials are mentioned briefly (see, Fig.1), and technical importance of multi-ferroic approach for designing advanced multi-functional actuator/sensors based on a mutual coupling effect between each ferroic material elements will be pointed out for intelligent/smart technology. as shown in Fig.2. [4] In this figure, E, H andσ mean Fig.1 Multi-ferroic materials and their mutual relationship with material functions.
Fig.1 Multi-ferroic materials and their mutual relationship with material functions.the electric energy, magnetic energy and elastic (strain) energy respectively.
For instance, ferromagnetic shape memory alloys ,i.e.NiMnGa,FePd , megnetoelectric materials,i.e.BiFeO3 and PMN-PT as shown in the overlapping area in Fig.1."
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Acknowledgement This work was supposed by National Natural Science Foundation of China under Grant No. 11072164.
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Acknowledgements The work was supported by the National Natural Science Foundation of China (Grant No.51171121) References [1] B.Y.
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Experimental procedures Heptahydrated ferric chloride (FeCl3.6H2O), ferrous sulphate (FeSO4.7H2O), ammonium hydroxide and polyethylene glycol (PEG) were purchased with analytical grade and used as raw materials for the synthesis of the nanoparticles.
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Figure 6c shows specific energy plotted against specific material removal rate.
Acknowledgements The research were financially supported by the National Natural Science Foundation of China (50875138); National Basic Research Program of China(2009CB724401); China Postdoctoral Science Foundation funded project (20080431234); the Specialized Construct Fund for Taishan Scholars and State key laboratory for manufacturing systems engineering Specialized Fund.
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