用于磁传感器的新结构磁电复合材料

A novel structure magnetoelectric composite for magnetic sensor

  • 摘要: 研究了可用于磁场传感器的磁电复合材料, 对传统的磁电复合材料进行了结构创新, 采用条状PZT和 Terfenol-D 的材料体系, 用热固树脂进行粘合, Terfenol-D 沿长度方向磁化且PZT条沿厚度方向极化。与传统的1-3型复合不同的是: 每根PZT的输出极被串联起来。在同样的磁场激励下, 新型复合材料的输出电压为相同体积的同种结构复合材料的2.2倍, 增强了材料对磁场的灵敏度和抗噪声性能。

     

    Abstract: A novel magnetoelectric (ME) composite which is suitable for magnetic sensor was fabricated, its structure is different from conventional ME composites. The strip PZT (Pb(ZrTi)O3) and Terfenol-D were laminated bonded with the thermoset epoxy. Terfenol-D layer was magnetized in its longitudinal direction and piezoelectric PZT strips were polled in their transverse direction. Every PZT strip was electrical series connected together, different from conventional 1-3 type ME composite. It gets much larger voltage output which is 2.2 times of conventional ME composite in the same magnetic field. The novel ME composite has higher magnetic field sensitivity and enhances the anti-noise characteristic. It’s a new way of using ME composite for small magnetic field sensor.

     

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