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Discussion board help and admin topics => Half Baked Ideas => Topic started by: Magnethos on November 03, 2008, 08:16:57 PM
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Where can I get one or buy one?
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GOOGLE ;D
http://www.graphitestore.com/stores.asp/cat_id/22
I also read that they exist in lantern batteries, but I don't think you would want to crack open one of those.
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GOOGLE ;D
http://www.graphitestore.com/stores.asp/cat_id/22
I also read that they exist in lantern batteries, but I don't think you would want to crack open one of those.
Yeah, I have seen that website. Really? Can I find them in lantern batteries?
(http://www.wisebread.com/files/fruganomics/imagecache/blog_image_full/files/fruganomics/blog-images/prod_8515.jpg)
One of this?
I haven't seen one of this never :O
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this is normally carbon.
they are all
Zinc-carbon batteries.
The center rood ist this what you search.
cou can also open alcaline batteries.
it is more material in because as an ring pessed to the inside of the conzainer.
ce center electrode is here an smal zinc-road.
pls google first out the material do see exactly waht it is.
Pese
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Ebay. In "Business and Industrial". They are used as welding rods for gauging material
out. Also, as people have mentioned above, batteries. Old U2 batteries have one
down the middle, but you will have some nasty Sulphuric Acid gel to deal with.
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Where can I get one or buy one?
Hi magnetos
the cheapest place is Mcmaster search for goughin rods they have all sorts and kinds with copper glad and without all sizes and are the best price.
greetings
walt
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Yeah, I have seen that website. Really? Can I find them in lantern batteries?
(http://www.wisebread.com/files/fruganomics/imagecache/blog_image_full/files/fruganomics/blog-images/prod_8515.jpg)
One of this?
I haven't seen one of this never :O
yes there are actually 4 single cells in just cut around the top of this plastic box and pry it open ( sometimes it works if you hit the batterie on the top agaainst the edge of a table and then pry it open with a screw driver) the single cells are just connected with a piece of wire. then carefully bend the edges of the zinc outer hull to the outside till the black plastic washer is free all the way around then take a pair of plier and twiste the brass cap a bit to both sides and pull carefully this way you have a nice carbon rod with allready the contact on it.
I used them in my old saltwater cells.
greetings
walt
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Graphite rods can be purchased from jeweler supplies, like Reo-Grand.
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For my experiments in the earth batteries topic, I purchased mine from a company called Airgas. They have a local outlet here in Kentucky in my town but they had to order mine. I bought a carbon rod 1" dia. x 18" long for $20 us. These are used in the welding industry for cutting rods. They are not used much anymore and are rarely in stock but they still make them. they are not coated and are 100% carbon. I hope this helps.
Bill
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But ... all this is CARBON.
If you look for "pure grafit"
You find this easy .
Look Wikipedia.
engl Pencil
germ Bleistift
http://en.wikipedia.org/wiki/Pencil
Pese
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pese:
Graphite is carbon.
Bill
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technically its an allotrope of carbon, like diamonds are. But realistically i don't think there is any benefit of using carbon in its elemental form over graphite so either would be acceptable
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@ Gestalt0:
Yes, you are correct and I agree.
Bill
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hope you didnt think i was correcting you. merely trying to help pese in understanding the difference/similarities in what he was describing.
Further to that if you actually buy some pencils, preferably proper artists graphite pencils rather than your standard HB then you will actually have some high quality graphite rods, however getting the "lead" out of the penicl in one piece is another story, but i belive you can purchase the type where you can refill the pencil with seperate lead.
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@ Gestalt0:
Not at all. Well, actually, you did correct my statement which was proper to do. My answer was an oversimplification and yours is the better answer.
My carbon rod is still going strong after being in the ground for about a year. I pulled it up about 3 months ago and cleaned it off, no sign of any breaking down of the material. (I am using these in my earth battery experiments.)
You are right about the pencils. At first, the only carbon I could find that was decent was inside carpenters pencils. Not too hard to remove as these pencils are flat.
Here are some pics of my carbon rod. About $20.00 US.
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If you want free carbon rods I would tear open old "D" size flashlight batteries to get them.Of course you would want to clean them off as they will have black powder on them (magnesium dioxide).I found that soap and water works very well.Rinse well and let dry overnight.Also just a wild thought on my part.I recently was reminded that coal is over 90% carbon.
So maybe coal is conductive?(no I haven't tried it).If it is then weird and exotic electrodes could be carved from it?Just a thought for the avid experimenter here.Triffid(dry wood is 50%carbon)
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Coal is made from wood and the different grades of coal have higher % of carbon in them than wood.Even peat is more than 50% carbon.Triffid
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You can buy Carbon Gouging Rods at any dedicated Welding supply store.
I bought a box of 50 of them for $26. They are 12 inches long and 1/4 inch thick.
They have a copper coating on them but you can easily peel the coating off,
Once you get it started at one end, it just peels off in a spiral. Start one end with a knife scrape and start peeling.
I tried using coal for an electrode, it does conduct electricity very well but it is almost impossible to cut or shape it.
It is so brittle that it keeps crumbling, also very hard material, so cutting it would need a hack saw.
The Carbon Welding Rods are much easier to work with. Just make a small cut in the rod and then you can snap it.
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I had a piece of hard coal and a voltmeter handy but my attempts to see if it was conductive were negative.The piece of coal has been in my collection in the open air for several years.Maybe a fresh piece of coal from the ground would
be conductive????
After my negative results I seemed to remember that carbon has to be in sheets or layers of atoms to be conductive.Like graphite.I guess its best to stick with graphite or carbon?Triffid
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graphite and coal.
There must be differences
With a graphite. Stylus, you can write and draw.
With charcoal too.
But with normal heating coal and lignite, Braunstein not.
Graphite powder can be used for door locks to "smear" To Auto-Oil to improve. But coal particles will destroy the parts. Graphite are microscopically thin wafers, which glide and therefore concerted smear, as well as write on paper
Its are two different materials. i have both in from of me to work sometimes with them.
EM
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it's not that they are different elements its just the way the "atoms" are arranged. if you wanted to get really technical then graphite is the purest form of "coal"
coal is just a name given to a fossil fuel made in a certain way. coal is comprised mainly of carbon, hydrogen and oxygen, the higer the carbon content the "purer" the coal is classified as going from lignite (brown coal) around 65% carbon to anthracite which is around 90+% carbon. graphite is not generally regarded as a coal due to the fact is not utilised in mainsteam as a fuel because its ridiculously hard to ignite it, but technically it is pure coal, comprising 100% carbon, aside from any impurities which we generally find in most elements (nitrogen in a dimaond being a good example)
technically peat is a form of coal too. but extremely soft. if i remember correctly all the peat in the world equates to some crazy amount of energy like 10 terajoules or something...cant remember the exact figure.
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pese:
Graphite is carbon.
Bill
[/quote
DIAMOND is also CARBON
(pur!)
all have chemical formula "C".
But al is differnt in use, workink and possibility to use them.
Pese]
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Well, here's a quick source: http://www.overunity.com/index.php?topic=5317.msg120810 (http://www.overunity.com/index.php?topic=5317.msg120810), also, you could use the larger graphite from drafting pencils for experimentation, they're much larger and come in a variety of hardnesses. These can usually be purchased at office supply stores or college book stores and provide a simple alternative for testing purposes until you can move on to (EDM) electrode discharge machining graphite.
A warning about using salt as an electrolytic with water though, chlorine is given off. If you stick with small currents for testing, this shouldn't be a problem; but I wouldn't use salt period, not in conjunction with graphite electrodes, it's just not a good idea.
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i suggest XRD Graphite Manufacturing Co.,Ltd,top china graphite rods supplier,here is their official website: http://www.xrdcarbon.com/ (http://www.xrdcarbon.com/)
hope can hlep you！
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I get all of mine out of dead batteries.
single-cell they are in the center, small ones.
a 9-v has 6 of them, small ones.
the square-rectangle, 6-v batteries have great, large electrodes in side them.
these I used many times in electrolizer units (H2O), several battery experiments,
electroplating/unplating units, etc.
They are a carbon (graphite) powder, with an electrically conductive glue-like binder, that holds their form.
they are stable in most conditions and do not corrode.
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A warning about using salt as an electrolytic with water though, chlorine is given off. If you stick with small currents for testing, this shouldn't be a problem; but I wouldn't use salt period, not in conjunction with graphite electrodes, it's just not a good idea.
it also leaves sodium-hydroxide in your tank, which over several cycles can become caustic.
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I get all of mine out of dead batteries.
single-cell they are in the center, small ones.
a 9-v has 6 of them, small ones.
the square-rectangle, 6-v batteries have great, large electrodes in side them.
these I used many times in electrolizer units (H2O), several battery experiments,
electroplating/unplating units, etc.
They are a carbon (graphite) powder, with an electrically conductive glue-like binder, that holds their form.
they are stable in most conditions and do not corrode.
How to make an Electrical Arc Furnace (http://www.youtube.com/watch?v=VTzKIs19eZE) with the electrodes (video)
Gravock
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Yo uso los carboncillos para dibujo, he podido alcanzar los 10.000º C.
charcoals for drawing, I use crayons for drawing, I could reach 10,000th C