Captret - Capacitor and Electret

[gravityblock]

Ferroelectricity is a property of certain materials in which they possess a spontaneous electric polarization that can be reversed by the application of an external electric field.  The internal electric dipoles of a ferroelectric material are coupled to the material lattice so anything that changes the lattice will change the strength of the dipoles (in other words, a change in the spontaneous polarization). The change in the spontaneous polarization results in a change in the surface charge. This can cause current flow in the case of a ferroelectric capacitor even without the presence of an external voltage across the capacitor.

Is the Captret displaying ferroelectricity?

http://en.wikipedia.org/wiki/Ferroelectric

[ibpointless2]

@ibpointless2,

I did short out the main terminals on a electrolytic capacitor.
I then shorted the wires to the metal can of the cap.

Every time I remove the short the voltage climbs to
approx. 0,05 Volt. I have shorted out the metal can 20
times now but the voltage always climb back.

I get plus at the metal can and minus at the shorted main terminals.

[EDIT] I have seen up to 0,1 Volt if I let the capacitor rest
          for longer time without short circuit.

Groundloop.

I did what groundloop did where he shorted the + and - and then shorted them to the cap top and when releasing it from the cap top to check the voltage my voltage raises 10 millivolts every 7 seconds. If you short it out again it raises 10 millivolts every 7 seconds and does so every time. The voltage climbs back every time using a 22uF 50V capacitor and groundloops too, and believe it will work with all electrolytic capacitors with a metal top.

Its amazing if it can do that only one time but many times is just crazy! where is this energy coming from? 

Just like a electret the captret when fully shorted out will gain power back when the short is removed.

[gravityblock]

Just like a electret the captret when fully shorted out will gain power back when the short is removed.

There is a similarity between electrets and the dielectric layer used in capacitors; the difference is that dielectrics in capacitors possess an induced polarization that is only transient, dependent on the potential applied on the dielectric, while dielectrics with electret properties exhibit quasi-permanent charge storage or dipole polarization in addition. Some materials also display ferroelectricity; i.e. they react to the external fields with a hysteresis of the polarization; ferroelectrics can retain the polarization permanently because they are in thermodynamic equilibrium, and are used in ferroelectric capacitors.  Materials displaying ferroelectrics is very similiar to the properties of electrets.

http://en.wikipedia.org/wiki/Electret

I have suggested that a new category should be added to this forum in regards to the electrets, http://www.overunity.com/index.php?topic=9883.0  Electret is to electric field as permanent magnet is to magnetic field.

[Edit:]  @All, Please help me to get electrets added as a category to this forum.  IMO, electrets or materials with a permenant electric field are equally important as permenant magnets in the quest for OU.

GB

[ibpointless2]

How to make self charging capacitors!

It must be a electrolytic capacitor.

1) Twist the "-" and the "+" leads together.
2) Get a 9 volt battery.
3) Connect one side of the battery to the twisted "-" and "+" pair and one to the top of the capacitor metal exposed area.
4) hold the battery there for a few seconds and remove it.
5) Un-twist the "-" and "+" pair.
6) Connect meter to capacitor to see voltage
7) disconnect meter and short out capacitor and let sit for a few seconds
Check capacitor voltage again to see if it is charging

Don't keep meter on capacitor, it could affect results.

Apply a load or a short and it should bounce back and charge.


This is just the Captret but in reverse.

*The lower the farad's the faster it will self-charge. I used 47uF @ 50 volts but any electrolytic capacitor will work.

[Kator01]

Hi ibpointless2,

try using electrolytic capacitors with different voltage specifications. The higher the voltage-specification the less charge-losses. Use 100 and 400 V Caps. 400 Volt-Caps are used in flashlight-circuits. Take an old camera fromthe dump an remove this small circuit-board

Will there be a difference in the recharge-speed ?

Kator01