Page 136 - eBook_Proceedings of the International Conference on Digital Manufacturing V2

Proceedings of the International Conference on Digital Manufacturing –
Volume 2

Figure 49: Rochelle salt Figure 50: Aluminium tape

Piezoelectric Characterisation of Material

Piezoelectric characterisation of aluminium tapes refers to the
ability to convert mechanical stress into electrical energy. While
aluminium itself is not a piezoelectric material, the introduction of
piezoelectric inclusions, such as ceramics or polymers, into a
composite does allow for some degree of piezoelectricity. Metal-
core piezoelectric ceramics fibre/aluminium composites that are
stronger and less brittle than traditional piezoelectric ceramics
have, for instance, been fabricated by researchers. They show
substantial promise as candidates for energy harvesting and
wireless strain sensors. Rochelle salt can turn mechanical stress
into electricity due to its unique crystal structure. Press or squeeze
it, and it generates energy, like a little electric spark from pressure.
It's been used in phonograph cartridges and sensors, making it a
classic example of piezoelectricity (Rawat, 2021).

Fabrication of Thin Film

First, we took Rochelle salt in powdered form and crushed it well
using a mortar and pestle for better results. After that, we affixed
aluminium tape to the glass slide; the thickness of the materials is
detailed in Table 16 and the dimensions of the aluminium tape
was 3cm x 3cm. We then placed it on the stirring device, which
was set to a temperature of 60 °C.

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