首页> 外文期刊>Physica, C. Superconductivity and its applications >AN IMPROVED ROUTE TO THE SYNTHESIS OF SUPERCONDUCTING COPPER OXYFLUORIDES SR(2-X)A(X)CUO(2)F(2+DELTA) (A=CA, BA) USING TRANSITION METAL DIFLUORIDES AS FLUORINATING REAGENTS
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AN IMPROVED ROUTE TO THE SYNTHESIS OF SUPERCONDUCTING COPPER OXYFLUORIDES SR(2-X)A(X)CUO(2)F(2+DELTA) (A=CA, BA) USING TRANSITION METAL DIFLUORIDES AS FLUORINATING REAGENTS

机译:以过渡金属二氟化合物为荧光试剂合成超导铜氧化物SR(2-X)A(X)CUO(2)F(2 + DEL)(A = CA,BA)的改进路线

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We report here a simple and efficient synthetic route to high temperature superconducting oxyfluorides. Solid phase fluorination of Sr(2-x)A(x)CuO(3) (A = Ca, 0 less than or equal to x less than or equal to 2.0; A = Ba, 0, less than or equal to x less than or equal to 0.6) with the transition metal difluorides, CuF2, ZnF2, AgF2, NiF2, at relatively low temperatures (225-250 degrees C) produces superconducting Sr(2-x)A(x)CuO(2)F(2+delta) with a maximum T-c of 64 K (for A = Ba, x = 0.6). This simple preparation route eliminates the need for F-2 gas, and at the same time produces negligible (Sr/A)F-2 impurity, unlike the corresponding fluorination with NH4F. Using this route the synthesis of the oxyfluoride, Ba2CuO2F2+delta, is also reported for the first time. These studies and the examination of the fluorination of other cuprate systems have shown that this is a powerful and versatile fluorination route. [References: 15]
机译:我们在这里报告了一种简单有效的合成方法,可用于高温超导含氟氧化物。 Sr(2-x)A(x)CuO(3)的固相氟化(A = Ca,0小于或等于x小于或等于2.0; A = Ba,0,小于或等于x小于过渡金属二氟化物CuF2,ZnF2,AgF2,NiF2等于或等于0.6),在相对较低的温度(225-250摄氏度)下产生超导Sr(2-x)A(x)CuO(2)F(2 +增量),最大Tc为64 K(对于A = Ba,x = 0.6)。这种简单的制备路线消除了对F-2气体的需求,同时产生了可忽略不计的(Sr / A)F-2杂质,这与用NH4F进行相应的氟化不同。首次报道了使用该途径合成氟氧化物Ba 2 CuO 2 F 2 +δ。这些研究和对其他铜酸盐体系氟化的研究表明,这是一种功能强大且用途广泛的氟化途径。 [参考:15]

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