In Dec.5,1988,we successfully developedsome high J<sub>c</sub> Y-Ba-Cu-O superconductortape on a nickel substrate by means of powderrolling.The tape is 0.94mm<s
In the presence of ethyl alcohol or emulsifier OP,molybdenum(Ⅵ) forms 1∶1∶1’water soluble colored coordination com-pound with both of 2-(2-thiazolylazo)-5-d
A Nicolet-200SXV FT-IR spectrometer combined with an exciting light set-up has been applied to determine the shallowimpurity concentration in detector--grade si
YBa<sub>2</sub>Cu<sub>3</sub> O<sub>7-x</sub>(YBCO) is one of thesuperconducting oxides with transition tem-perature above 90K.It has a orthorhombic crystal struc