Re: Piezoelectric dimensions problem in energy harvesting

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SUMMARY

The discussion centers on the complexities of piezoelectric energy harvesting using a cantilever structure designed in COMSOL. The structure consists of three layers: a silicon carbide (SiC) substrate, a zinc oxide (ZnO) piezoelectric layer, and an aluminum (Al) electrode. The user notes that as the thickness of the piezoelectric layer increases, the generated electric potential values become nonlinear, contradicting theoretical expectations of direct proportionality to thickness. A suggestion is made to reference actual piezoelectric device datasheets for accurate properties rather than relying solely on theoretical models.

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  • Understanding of piezoelectric materials, specifically zinc oxide (ZnO).
  • Familiarity with cantilever structures in energy harvesting applications.
  • Proficiency in using COMSOL Multiphysics for modeling and simulation.
  • Knowledge of material properties and datasheets for piezoelectric devices.
NEXT STEPS
  • Research the properties of zinc oxide (ZnO) in piezoelectric applications.
  • Explore COMSOL Multiphysics tutorials focused on cantilever beam modeling.
  • Obtain and analyze datasheets for various piezoelectric devices.
  • Investigate the nonlinear behavior of piezoelectric materials under varying thicknesses.
USEFUL FOR

Engineers and researchers involved in energy harvesting projects, particularly those focusing on piezoelectric materials and cantilever structures, as well as students studying advanced materials science and engineering.

jagan414
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hi

I am doing project on piezoelectric energy harvesting which is a cantilever structure using COMSOL. I have some doubts related to my project. I designed cantilever structure having three layers substrate (SiC), piezo (ZnO) and electrode (Al). My doubt is that when piezoelectric layer thickness is increasing, generated electric potential values are nonlinear . But I saw theoritically electric potential is directly proportional to thickness of piezoelectric. Please anyone share the information regarding this topic.

Thank you
 
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I wouldn't use theory for that problem. Actual devices are usually more complicated than simple theories.

Choose the actual piezoelectric device, then get the datasheet for it's properties.
 

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