Creation of electromagnetic sensor using the singular fields in joints

2016 Fiscal Year Final Research Report

• Project/Area Number: 26289003
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Materials/Mechanics of materials
• Research Institution: Nagaoka University of Technology
• Principal Investigator: Koguchi Hideo 長岡技術科学大学, 工学(系)研究科(研究院), 教授 (90143693)
• Co-Investigator(Kenkyū-buntansha): Luangarpa Chonla 長岡技術科学大学, 工学(系)研究科(研究院), 助教 (00751968) ; 倉橋 貴彦 長岡技術科学大学, 工学(系)研究科(研究院), 准教授 (00467945)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 三次元圧電接合体 / 特異場 / 界面 / 特異場の強さ / 保存積分法 / センサ / 電界 / 電圧

Outline of Final Research Achievements

The object of this study is to obtain the guidelines on manufacture of high sensitive electromagnetic sensors by utilizing the characteristics of singular fields of piezoelectric displacements at the vertex in three-dimensional piezoelectric joints. Large singular fields of stress and electric displacement occur around the edge of interface including the outside of joints for compressive stress in the vertical direction of the interface, and the intensity of electric displacement near the edge of interface in the joint is larger that in single-phase materials. When the value of dielectric constant in the piezoelectric material increases, the intensity of singularity increases. In manufacturing the piezoelectric joints, it is desirable that a resin with curing temperature of room temperature or below Curie’s temperature should be used. In experiments, the voltage between the upper and lower surfaces in the joints is higher than that in single-phase materials.

Free Research Field

材料力学