We report the solution fabrication of a MgB2 coated conductor on a stainless steel substrate.The precursor solution of Mg(BH_(4))^(2) diethyl ether is initially synthesized by refluxing the milled mixture of NaBH4 and...We report the solution fabrication of a MgB2 coated conductor on a stainless steel substrate.The precursor solution of Mg(BH_(4))^(2) diethyl ether is initially synthesized by refluxing the milled mixture of NaBH4 and MgCl_(2) in diethyl ether.Then the Mg(BH4)2 diethyl ether is spin coated on a stainless steel substrate and annealed in Mg vapor,which yields a homogeneous MgB_(2) coated conductor.X-ray diffraction indicates that the grown MgB_(2) coated conductor is polycrystalline.It has a superconducting transition temperature of 34-37K.The slope of the upper critical field HC_(2) increases with decreasing temperature,and the extrapolated value of Hc2 (0)reaches ~28 T.The critical current density estimated by the Bean model is JC (25K,0 T)~1 06 A.cm^(-2).These parameters indicate that the solution method is potentially able to produce MgB_(2) coated conductors that can satisfy application purposes.展开更多
基金Supported by the National Basic Research Program of China under Grant Nos 2006CD601004 and 2011CB605904.
文摘We report the solution fabrication of a MgB2 coated conductor on a stainless steel substrate.The precursor solution of Mg(BH_(4))^(2) diethyl ether is initially synthesized by refluxing the milled mixture of NaBH4 and MgCl_(2) in diethyl ether.Then the Mg(BH4)2 diethyl ether is spin coated on a stainless steel substrate and annealed in Mg vapor,which yields a homogeneous MgB_(2) coated conductor.X-ray diffraction indicates that the grown MgB_(2) coated conductor is polycrystalline.It has a superconducting transition temperature of 34-37K.The slope of the upper critical field HC_(2) increases with decreasing temperature,and the extrapolated value of Hc2 (0)reaches ~28 T.The critical current density estimated by the Bean model is JC (25K,0 T)~1 06 A.cm^(-2).These parameters indicate that the solution method is potentially able to produce MgB_(2) coated conductors that can satisfy application purposes.
