NIST researchers have developed detailed computer models of a new piezoelectric sensor device made from PMN-PT material. The device, called a PMN-PT micromachined cantilever, consists of a t-shaped structure with a suspended leg that droops slightly. The top layer of the device shows high stress when stretched, while the middle and bottom layers exhibit low and medium stress respectively.
The device is made up of several layers, including silicon, lead titanate, strontium rubidium oxide, and lead magnesium niobate-lead titanate. When a low voltage is applied, the cantilever moves up and down, demonstrating the piezoelectric material’s ability to convert external forces into electric charge.
This technology has the potential to create more sensitive sensors and harvest energy from vibrations, such as those generated by walking, to power devices. The researchers believe this could lead to innovative applications and more efficient systems.
Keywords: piezoelectric, piezoelectric materials, mechanical motion, electric charge, vibrational energy
