Suppose a material of interest is generating signals in terms of volts. The overall mechanism behind the generation of output voltage is triboelectric and partly piezoelectric. What are the characterizations which can help in distinguishing clearly the both of them?
Anupam Chowdhury In terms of output voltage, it might be difficult to distinguish. However, the piezoelectric voltage signal has comparatively larger width than triboelectric.
Another better way to distinguish piezoelectric and triboelectric effect is from output charge and power. Piezoelectric charge has high consistency than the triboelectric charge measured over multiple times. And the optimal load resistance for maximum output power for piezoelectric is very low than triboelectric.
It should be easy to distinguish the two effects: piezo electricity is the result of mechanical stress (compression, flexure or tension depending on the material polarization). Tribo-electricity comes from rubbing the material skin. If you apply proper care, you can rub without stressing or stress without rubbing. The piezo-electic voltage must be measured between the two ends of the sample, the tribo-electric charge from the earthing. Good luck !
Ijaj Duranni Sir, I will surely look into the links. Thanks a lot.
Dear Anupam, although it was asked last year, this is still a very interesting technical question. The main difference between piezoelectric and triboelectric effect has already been outlined by Bernard Garnier. For an interesting research paper about this topic please have a look at the following relevant article:
Triboelectric Nanogenerator versus Piezoelectric Generator at Low Frequency (
Frank T. Edelmann Sir, I came across this interesting review article along the lines of my asked question:
Article Measuring Piezoelectric Output—Fact or Friction?
Piezoelectric means if there is mechanical stress there will be electricity or charge, ( using this effect clock is work)on the other hand triboelectric means if there is friction or in contact 2 surfaces there is a static charge. The piezoelectric effect is special criteria of a specific material( e.g.Quartz crystal) whereas the triboelectric effect occurs for any two materials which can generate static charge is a certain temperature, weather( e. g.comb and paper in winter season especially in Bangladesh).
Measure the output by reversing the terminals.If the output voltage also reverses, the it is piezoelectric, if it does not, then it is tribo-electric.
Simple!
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