October 25, 2021, 03:44:13 PM
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Topic: Ferroelectrics polymers  (Read 1584 times)

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Offline PEEK

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Ferroelectrics polymers
« on: July 06, 2021, 11:10:45 AM »
Hello, I would need some help regarding ferroelectric polymers. I know that ferroelectrics have piezoelectric properties. For piezo, they don't have a permanent dipole moment and the fact of compressing them for example will create a dipole moment and thus allow electrons to circulate. But for a ferro, the dipole moment is permanent. So how will compressing our material for example allow the creation of an electric current? Will this compression reduce the dipole moment, and therefore the electrons will circulate from one surface to another to balance the charges? And what happens when our material is stretched?
Thanks in advance for your help.


Offline Corribus

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Re: Ferroelectrics polymers
« Reply #1 on: July 06, 2021, 12:01:27 PM »
For piezo, they don't have a permanent dipole moment
Piezoelectric materials can have a permanent dipole moment. In fact about half of the crystal classes that are capable of being piezoelectric are formally polar crystal classes (pyroelectric).
What men are poets who can speak of Jupiter if he were like a man, but if he is an immense spinning sphere of methane and ammonia must be silent?  - Richard P. Feynman

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