| Author | Message | ||
     Phinch |
I was wondering if the carbon rod electrodes extracted from batteries could be replaced with mechanical pencil leads. particularly the older drafting style pencils. | ||
| Simon Quellen Field (Sfield) |
Certainly. You may want to use several, to get the same surface area. | ||
| Robin Klein |
Dear Mister Fields, I am having a very hard time finding cabon zinc batteries could you please recommend some place where I might find them. I have already looked at Radio Shack and the man there didn't even know what a carbon zinc barttery is. I will understand if you can't recommend where to obtain such an item. I also can not order them from the internet because I do not have a credit card. Could I get them from a CVS or other type of drug store? Thank you very much Robin | ||
| Simon Quellen Field (Sfield) |
You can use a bunch of pencil leads, or a carbon rod used for arc welding that you get from a hardware store. If you find a cheap battery that does not say "alkaline", then you have probably found a carbon-zinc battery. Ask Radio Shack if their "heavy duty" batteries say "alkaline" on them. | ||
| Robin Klein |
Dear Mister Field Thank you very much for your help. I think I will have to go with the carbon rod from the arc weilder because my Radio Shack does not carry those batteries anymore. now I go see if my hardware store has a carbon rod. thank you very much once again, Robin | ||
| Tristan Unregistered guest |
I get the Carbon rods from batteries at a 'Dollar Tree' store. They usually have two packs for all sorts of batteries (9V, AA, AAA, I even got a 8 pack of LR44 batteries!) The batteries last a fairly long time. And, being the Dollar Tree/Dollar store, Everything is 1$!. | ||
| MadDrJ Unregistered guest |
Actually, if you're looking for Zinc Air-depolarized Alkaline Batteries, or Zinc Air-depolarized Saline Batteries, there's a company called Saft that you may wanna look into. They also make some Silver-zinc (Ag-Zn), and Magnesium-silver chloride (Ag-ClMg) batteries. Along with Lithium-thionyl chloride (Li-SOCl2),Lithium-sulfur dioxide (Li-SO2), Lithium-manganese dioxide (Li-MnO2),Lithium Ion, NiMH, NiCD,Ni-H2..... www.saftbatteries.com | ||
| Arthur Yip (Peregrineay) Intermediate Member Username: Peregrineay Post Number: 27 Registered: 4-2005 |
9V hobby batteries are usually 4 dry carbon-zinc cells in series. I've been removing carbon rods from all dead hobby batteries I get my hands on! | ||
| Simon Quellen Field (Sfield) Senior Member Username: Sfield Post Number: 1013 Registered: 12-2004 |
Do you mean 6 volt? Carbon zinc cells are 1.5 volts each. Four of them make 6 volts. There are 6 cells in a 9 volt battery. | ||
| Arthur Yip (Peregrineay) Intermediate Member Username: Peregrineay Post Number: 31 Registered: 4-2005 |
oops again... XD 6V | ||
| meredith lamb (Paleo) Junior Member Username: Paleo Post Number: 6 Registered: 2-2006 |
Phinch, As far as being quite diamagnetic; one particular pencil lead I've seen and used occasionally in the past; is a brand called Farber-Castell and is their "1.4B" size. You won't find it in a Wal-Mart, but some specialty art/paper supply stores (including the web)may offer some. Its not cheap...but is quite diamagnetically effective. Depending on the magnet setup used; it will levitate by itself, which is something that "common" graphite usually won't do. I think the purity level of such is close to even spectrographic carbon rods. | ||
| mnado (Mnado) Senior Member Username: Mnado Post Number: 175 Registered: 12-2005 |
Can you levitate the graphite in badminton raquets? | ||
| meredith lamb (Paleo) Junior Member Username: Paleo Post Number: 9 Registered: 2-2006 |
mnado: The outer frame of such is probably covered with carbonized rayon fibers, with some kind of resin binder like epoxy which is impregnated into the cloth...which is done to impart strength to the (various materials) structure its put on. This "graphite" layer imparts more strength to the frame as a whole. Flexible "graphite" cloth without the resin, is roughly ~98.0% pure; but even this purity level makes it a likely failure to levitate. You need ~ >99.99% or better to levitate real graphite (and then it needs to be very thin). It doesn't take much iron (or other filler impurities) to fail any "real graphite" being tested for levitation. Sometimes this strengthening "carbon graphite" layer is also called a "laminate". | ||
| mnado (Mnado) Senior Member Username: Mnado Post Number: 179 Registered: 12-2005 |
Okay, I understood that clearly How about using a stronger magnet, would that help? | ||
| meredith lamb (Paleo) Member Username: Paleo Post Number: 14 Registered: 2-2006 |
mnado: Doubt there will ever be a economical affordable magnet/s for the average consumer market (you-me) that could do that. "Think", that even the giant electromagnets currently in use (acouple in the world?), that do diamagnetic levitation research, don't even have the room therein to accomodate such a size object as a raquet. | ||
| Twors (Twors) Junior Member Username: Twors Post Number: 7 Registered: 7-2006 |
about carbon in many pet fish books, they say to purify the water use activated carbon, and in older books they say use charcoal or activated carbon. is pencil graphite activated carbon? what is activated carbon? | ||
| Michael (Michaelt) Senior Member Username: Michaelt Post Number: 119 Registered: 12-2005 |
No, it's not the graphite in a pencil. Activated carbon (or 'activated charcoal') is a highly porous charcoal with an incredibly high surface area. It is used in filtration as it adsorbs a wide range of impurites. (Adsorption is the attachment by chemical attraction, as opposed to absorption which is irrespective of chemical attraction.) | ||
| Twors (Twors) Member Username: Twors Post Number: 12 Registered: 7-2006 |
let's say platinum is 10 for being catalyst, how would pencil graphite compare to platinum from 1 to 10? | ||
| Arthur Yip (Peregrineay) Intermediate Member Username: Peregrineay Post Number: 45 Registered: 4-2005 |
If you're talking about the fuel cell project, graphite is no good as a catalyst, and there would be virtually no reaction. Graphite will conduct electricty fairly well however. Its advantage over common metal electrodes is that graphite is easy to find and will be less likely to corrode/wear away. | ||
| greg koz (Greg1118) Intermediate Member Username: Greg1118 Post Number: 33 Registered: 10-2006 |
I am having trouble opening the battery. I dont understand how to do it. Please help. | ||
| greg koz (Greg1118) Intermediate Member Username: Greg1118 Post Number: 36 Registered: 10-2006 |
Please | ||
| Simon Quellen Field (Sfield) Senior Member Username: Sfield Post Number: 1558 Registered: 12-2004 |
Google is your friend. | ||
| James (Magnets) Senior Member Username: Magnets Post Number: 105 Registered: 6-2006 |
man, what would we do without google.... | ||
| Alex Roberts (Whoo_mythbusters) Senior Member Username: Whoo_mythbusters Post Number: 178 Registered: 9-2005 |
Use Yahoo | ||
| James (Magnets) Senior Member Username: Magnets Post Number: 106 Registered: 6-2006 |
i think google is better than yahoo but maybe its just me | ||
| Alex Roberts (Whoo_mythbusters) Senior Member Username: Whoo_mythbusters Post Number: 179 Registered: 9-2005 |
Oh I completely agree, but if we didnt have Google.... | ||
| James (Magnets) Senior Member Username: Magnets Post Number: 108 Registered: 6-2006 |
plus Simon works for google!!  |
