Silver-Enhanced Synthesis of YBa_2Cu_3O_<7-x>

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概要

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• Formation of the high-T_c superconducting oxide YBa_2Cu_3O_<7-x> via Y_2BaCuO_5+3BaCuO_2+2CuO→2YBa_2Cu_3O_<7-x> was found to be greatly accelerated by silver (Ag). As an example, for calcination at 900℃ for 1 h, the fractional conversion was almost tripled with an addition of 2% (by weight) Ag in the reactant powders. Furthermore, for the calcined powders showing similar extents of the reaction, both the Meissner effect and T_c (up to 95 K) increased with the Ag content. DTA studies established that the temperature at which the maximum reaction rate occurred was significantly lowered due to the presence of Ag.

• 社団法人応用物理学会の論文
• 1990-04-20

著者

• Chang Ying-chih

  Department Of Chemical Engineering National Taiwan University

• WU Nae-Lih

  Department of Chemical Engineering, National Taiwan University

• Wu N‐l

  National Taiwan Univ. Taipei Twn

• Wu Nae-lih

  Department Of Chemical Engineering National Taiwan University

関連論文

• Silver-Enhanced Synthesis of YBa_2Cu_3O_
• Reduced Cracking in Melt-Grown RBa_2Cu_3O_7 (R=Nd, Sm)/Gold Composites
• New Reaction Routes for Preparing Single-Phase Tl_2CaBa_2Cu_2O_8 and Tl_2Ca_2Ba_2Cu_3O_ Powders from Stoichiometric Mixtures

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