 Superglue dielectrics?
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Conundrum
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Tue Aug 02 2011, 08:29PM
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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
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Hi.
As you may or may not know, I have been experimenting with the use of cyanoacrylate (aka Superglue) as a dielectric for an N2 laser based on PCB stock grooved using a hacksaw etc.
Results so far look good, the plate capacitor of 2* approx 50cm2 has a capacitance of 4.9nF on one side and 10nF on the other when overpainted with silver conducting paint.
Used the bar spreading method to get an even layer but no doubt the spin coating method would work as well if not better.
Its also relatively simple to make the top connection- put another piece of PCB copper downwards over the cavity to link the two sides.
However this also gave me an idea.
In principle could I get away with mixing in BaTiO3 (aka barium titanate) dielectric powder with the superglue to form a printable capacitor?
This also makes me wonder if I could dope the glue at the same time by mixing in a finely divided solid salt such as potassium chloride?
If this works then the glue would act as a semiconductor which raises the possibility of printable electronic components on the cheap.
Use gallium/indium as the metal contacts maybe?
-A
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Bored Chemist
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Registered Member #193
Joined: Fri Feb 17 2006, 07:04AM
Location: sheffield
Posts: 1022
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I don't see how doping an insulator like KCl into another insulator ( superglue) will give a semiconductor.
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