How to obtain the resonance frequencies of a given material?

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Discussion Overview

The discussion revolves around obtaining the resonance frequencies of materials, specifically focusing on the plasma frequency and resonance frequency of Polyethylene Terephthalate (PET). Participants explore the theoretical and experimental aspects of resonance frequencies, including the use of the Lorentz oscillator model.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant mentions a resonance frequency of 7 eV and queries how to convert this to Hz.
  • Another participant requests additional context regarding the experimental setup to better understand the question.
  • A participant expresses the need to draw a permissivity curve using the Lorentz oscillator and seeks parameters such as plasma frequency and resonance frequency for PET, noting difficulty in finding this information in literature.
  • There is a question about the specific type of resonance being referred to (audio, RF, etc.), with a suggestion that mechanical resonance depends on various factors including size, shape, and temperature.
  • Some participants correct the term "permissivity" to "permitttivity" and provide a link to a resource that may assist in understanding the Lorentz oscillator model.
  • One participant highlights the complexity of obtaining parameters for PET due to its non-pure nature compared to metals like gold or aluminum.

Areas of Agreement / Disagreement

Participants express uncertainty regarding the specific resonance type being discussed and the parameters needed for PET. There is no consensus on how to obtain the resonance frequencies or the definitions being used.

Contextual Notes

Participants note the potential confusion around terminology and the need for clarity on the experimental context. The discussion also highlights the complexity of working with non-pure materials like PET.

Who May Find This Useful

Researchers and students interested in material science, specifically those studying resonance frequencies and the properties of polymers like PET.

Andre Teixeira
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The frequency of plasma already achieved ... in a study, is presented the resonance frequency in eV, how to obtain in Hz? Wo = 7eV
 
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Andre Teixeira said:
The frequency of plasma already achieved ... in a study, is presented the resonance frequency in eV, how to obtain in Hz? Wo = 7eV
Welcome to the PF.

Can you provide a lot more context to your question and more details? What was the experimental setup?
 
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Basically, my study is to draw a permissivity curve by frequency, using the Lorentz oscillator, I need some parameters, such as plasma frequency and resonance frequency of the material, I can not find in the literature the frequency of resonance of the PET material
 
Andre Teixeira said:
I can not find in the literature the frequency of resonance of the PET material

Resonance at audio ? RF ? what ? ( I'm assuming RF)
and please confirm what you mean by PET material ?
the mechanical resonance ( sound wave) of a block of material will depend on things like its size, shape, density, temperature etc
 
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DaveC49 said:
Do you mean permitttivity rather than permissivity? Look up the definitions. You may find this link useful chrome-extension://oemmndcbldboiebfnladdacbdfmadadm/https://ocw.mit.edu/courses/electri...-spring-2011/readings/MIT6_007S11_lorentz.pdf

PET, Polyethylene terephthalate, I want to know how to obtain the parameters of the lorentz oscillator, for this material, PET, a material that requires an extra complexity not to be pure, like gold or aluminum

Sorry for bad English.
 
Sorry, I know there is a language barrier, but this thread is closed temporarily for Moderation...
 

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