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Thread: superconductors

  1. #1 superconductors 
    Forum Ph.D. Nevyn's Avatar
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    What is a Superconductor?


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  3. #2  
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    Simply a conductor with zero electrical resistance - no more no less.

    A second definition might be "Bus driver of the year"


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  4. #3  
    Forum Ph.D. Nevyn's Avatar
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    that's funny, here's another one

    A man whose been working as a conductor all his life arrives in court because he murdered someone, the Judge finds him guilty and punishes him to death by electric chair, the guy sit's in the chair but when the switch is pulled nothing happens, they try again and again but still nothing happens. When they ask him why it's not working the man replies " i guess i am just a bad conductor"
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  5. #4  
    Forum Ph.D. Nevyn's Avatar
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    To have a superconductor, wouldn't you need tempretures of 0 K?
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  6. #5  
    Forum Isotope Zelos's Avatar
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    nope, the latest super conductor is close to the boiling point of liquid nitrogen.
    the first one they found was mercery at 3K
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  7. #6  
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    Some years ago I believe I heard they had got superconducting composites to work at around -80c
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  8. #7  
    Forum Isotope Zelos's Avatar
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    no thats not the case yet
    if it were true we would see superconducter networks bieng constructed all over the globe since it all of a sudden got profitible
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  9. #8  
    Forum Ph.D. Nevyn's Avatar
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    could have been a semiconductor
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  10. #9  
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    A search on the internet though gives only a cuprate-perovskite material at (Tc=138 K, that is −135 °C).

    that's 60K above the boiling point of nitrogen, and 50k less than what I thought, as a gentlemen I'll concede a 'draw'.
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  11. #10  
    Forum Isotope Zelos's Avatar
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    sounds fair. but then im wondering why the expansion of superconductor network hasent begun, what i heard a while ago the reach of nitrogen boiling point was the point they were looking for to be able to expand/create it
    I am zelos. Destroyer of planets, exterminator of life, conquerer of worlds. I have come to rule this uiniverse. And there is nothing u pathetic biengs can do to stop me

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  12. #11  
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    I cannot see it will be profitable until room temperature, all while you have to use energy to cool it, the small amount of energy gained through zero resistence is negligible for small scale applications. for example your 80watt [input power] Video recorder could use superconductors and reduce it's power input to about 60Watt, but then there's the 1000 watt -135c cooling kit...
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  13. #12  
    Forum Professor captaincaveman's Avatar
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    yeah i thought the temperature of materials super conducting was slowly creeping up, into thew area megabrain was saying. Im pretty sure it was some form of ceramic
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    I'm bloody sure it was, around -85c then it all went quiet, perhaps people are keeping quiet about it, perhaps the military have grabbed it, perhaps they were mistaken, or perhaps we are wrong,
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  15. #14 Ceramic? 
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    Ceramic ?

    I thought ceramic was an insulator ?

    Hence why they use ceramic discs on pylons.
    The hand of time rested on the half-hour mark, and all along that old front line of the English there came a whistling and a crying. The men of the first wave climbed up the parapets, in tumult, darkness, and the presence of death, and having done with all pleasant things, advanced across No Man's Land to begin the Battle of the Somme. - Poet John Masefield.

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  16. #15  
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    The wonders of modern science...
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  17. #16  
    Forum Professor captaincaveman's Avatar
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    heres one link on ceramic super conductors

    http://micro.magnet.fsu.edu/micro/ga...tor/super.html

    http://www.howstuffworks.com/question610.htm


    both are only quoting superconductivity into the 120k area, but im sure they gone better than this
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