what is superconductivity

Superconductivity - Superconductivity occurs in certain material s at very low temperature s. When superconductive, a material has an electrical resistance of exactly zero. It was discovered by Heike Kamerlingh Onnes in 1911. Like ferromagnetism and atomic spectral line s, superconductivity is a quantum..

Superconductivity - Superconductivity occurs in certain material s at very low temperature s. When superconductive, a material has an electrical resistance of exactly zero and no interior magnetic field (the Meissner effect). It was discovered by Heike Kamerlingh Onnes in 1911. Like ferromagnetism and..

Superconducting Turbojet - ScienceDaily (June 20, 2007) — An all-electric aircraft could soon appear over the horizon according to an article in the Institute of Physics' journal, Superconductor Science and Technology. The new type of aircraft, currently on the drawing board, could be far more efficient than conventional aircraft, produce less greenhouse emissions, and be quieter. See also: Matter & Energy Aviation Energy Technology Vehicles Earth & Climate Energy and the Environment Renewable Energy Environmental Science Reference Internal combustion engine Military aviation Alternative fuel vehicle Transport Air travel is on the increase, but it comes at a price in terms of the emissions driving climate change. Aircraft currently account for about 5% of UK emissions with a single long-haul flight the equivalent of a ton of carbon dioxide per passenger. With such worrying figures making the headlines, alternatives to combustion-based propulsion systems could be the key. Superconducting motors could be one suc....

Superconductivity: Which One Of These Is Not Like The Other? - ScienceDaily (July 17, 2009) — Superconductivity appears to rely on very different mechanisms in two varieties of iron-based superconductors. The insight comes from research groups that are making bold statements about the correct description of superconductivity in iron-based compounds in two papers about to be published in journals of the American Physical Society. See also: Matter & Energy Electronics Petroleum Inorganic Chemistry Computers & Math Computer Graphics Mathematical Modeling Statistics Reference Electrical conduction Oxidizing agent Transition metal Metal The 2008 discovery of high-temperature superconductivity in iron-based compounds has led to a flood of research in the past year. As the literature mounts on these materials, which superconduct at temperatures as high as 55 K, two key questions are emerging: Is the origin of superconductivity in all of the iron-based compounds the same and are these materials similar to the copper oxide-based high-temperature supercon....

  Superconductivityeducational type video would turn out. This was fun to make.. it was largely an image-hunt, which was a blast. Note that some of the images don't have much to do with what I'm talking about (it's very hard to find a picture of electrical resistance), so in some cases I just threw in some nice pictures to look at. I hope you enjoy. Also, the story about the physicist, Onnes, is a bit of a fabrication. I know he was studying temperatures and resistances, and he stumbled across ...

  Demonstrating superconducting magnetic levitationMore at: www.BoreMe.com - Superconducting train demo. The property of zero electrical resistance in some substances at very low absolute temperatures.

Question : Which metal exhibits superconductivity at a temperature closest to room temperature?

Answer : As of 2005, the highest-temperature superconductor (at ambient pressure) is mercury thallium barium calcium copper oxide (Hg_0.8Tl_0.2Ba_2Ca_2Cu_3O_8.33), at 138 K.

Question : What would be some of the implements of superconductivity for spacecrafts? How will it work, as in gravity, magnetic field ect.? Has there been any major discovery in this field, such as a superconductor at room temperatures?

Answer : The world record is 138 K, now held by a thallium-doped, mercuric-cuprate comprised of the elements Mercury, Thallium, Barium, Calcium, Copper and Oxygen. As far as we know, superconductivity will not allow us to build spaceships. Why would it? But a proper spacecraft would have it's entire electrical circuit made of superconductors, to cause minimal energy loss. (as would any electrical system of earth, given they can be produced cheaply). If anybody had any idea about how spaceships would work, it would already be built. 138K is a pretty high temperature (for superconductors), but it's way too cold to use in any place where humans have to be close-by, or to be more energy-efficient than normal conductivity.