[Boatanchors] Question...

[w5jo at brightok.net]

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Best Answer:  In general, carbon is a nonconductor. Graphite is one of the forms of solid carbon. In graphite, one of the outer electrons of the carbon atom is not involved in the crystal bonding of the solid. That electron is somewhat free to move, and graphite therefore can conduct an electrical current, but it conducts much more poorly than metals. Graphite is used to make carbon resistors, which conduct electricity but with higher resistance. 

A diamond, which is a different crystalline form of carbon, does not conduct electricity. 
Source(s): http://www.madsci.org/posts/archives/199... 
William E · 7 years ago 



From: Glen Zook 

Carbon black, when used as just a pigment, such as in paint, is not, usually, very conductive, based on the composition of the basic substance in which the carbon black is immersed.  However, when used as a filler, and so forth, in other things, such as plastic, etc., then it can definitely be conductive.  Carbon black is used in ESD protection items, etc.


http://www.moderndispersions.com/CONDUCTIVITY.pdf


http://www.ampacet.com/faqs/conductive-carbon-blacks-how-to-use-them/


http://www.premixgroup.com/product-cats/conductive-compounds/conductive-carbon-black/


Glen, K9STH 

Website: http://k9sth.net


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From: "w5jo at brightok.net" <w5jo at brightok.net>
To: boatanchors at mailman.qth.net 
Sent: Thursday, November 26, 2015 7:27 PM
Subject: Re: [Boatanchors] Question...



All carbon blacks have chemisorbed oxygen complexes (i.e., carboxylic, quinonic, lactonic, phenolic groups and others) on their surfaces to varying degrees depending on the conditions of manufacture. These surface oxygen groups are collectively referred to as volatile content. It is also known to be a non-conductive material due to its volatile content.

The coatings and inks industries prefer grades of carbon black that are acid oxidized. Acid is sprayed in high temperature dryers during the manufacturing process to change the inherent surface chemistry of the black. The amount of chemically-bonded oxygen on the surface area of the black is increased to enhance performance characteristics.