Biography-center - Letter B Becquerel Antoine Henri • Becquerel Henri • Becton Edwin Pinckney • Becton John May • Bedard Myriam • Beddoe Earl Percy • Bedford Gunning • Bedichek Roy • Bednorz J. Georg http://www.biography-center.com/b-5.html
Extractions: Powered by JRank Chemistry St-Te Superconductivity, which is defined as the absence of resistance in a conducting material to a continuously flowing electric current, is a special property that a sizable number of substances attain suddenly at very low temperatures. The substances (called superconductors) include elements, alloys T C , is the temperature above which no super-conductivity can be obtained. For elements, alloys, and simple compounds, very low critical transition temperatures ( T C 23 K) mean that the cooling effects of liquid helium ( B.P. = 4 K) are needed to bring about and to maintain their superconductivity. The discovery in 1986 that nonstoichiometric ceramics containing copper and oxygen can have much higher T C values has provided a new impetus for developing superconducting materials. x Ba x CuO y , with the then record high
Palo Alto High School 1987 :: Back In 1987 BEDNORZ, J. GEORG, Federal Republic of Germany MULLER, KARL ALEXANDER, Switzerland for their important breakthrough in the discovery of superconductivity in ceramic materials http://www.paly87.com/1987stuff.html
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