高温超伝導体YBa_2Cu_3O_<7-δ>の自発的重合開始活性を用いたPMMAとの複合材料

概要

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In this report the spontaneous polymerization of vinyl monomer using the superconductor YBa2 Cu3O7-δ was studied. It is known that superconducting characters of this material is influenced by conditions of oxidation in the synthetic process. Although the superconductivity transition temperature, Tc of fully oxidized YBa2Cu3O7 (Y7) is about 90K, this material is transferred to a semiconductor YBa2Cu3O6 (Y6) with tetragonal structure upon reduction at high temperature and under low oxygen pressure. The Y7 could be dispersed in the polymerization of methyl methacrylate (MMA), but not for the Y6. Thus the PMMA with the powder of Y7 was composed. The process of the polymerization is the free radical chain reaction. The composite resin itself is an insulator, but the Tc is observed by the measurement of alternating current susceptibility. The Tc of the superconductor in the matrix resin is almost similar to that of assintered. The superconductor in the composite resin has water proofness and thermostability.
日本複合材料学会の論文
2002-07-15