【摘要】 通过改变粉末的最终烧结温度制备出不同相组成的前驱粉。研究了前驱粉的相组成对Bi(Pb)-2223/Ag带材性能和带材微观结构的影响;从而得出装管前粉末的最佳相组成为:(Pb)2212主相加上一定量的第二相犤Ca2PbO4和(Sr,Ca)CuO犦,不含2201和2223相。前驱粉的最佳烧结温度应刚好低于2223相的起始成相温度820℃。制备出的最高带材性能Jc达到12kA/cm2。更多还原

【Abstract】 The influence of the phase assemblag e of precursor powder on microstructures and the properties of Bi (Pb)-2223/Ag tapes has been studied.The phase assemblage was controlled by changing the final c alcination temperature.The r esult s show that a precursor powder containing mainly the Bi (Pb)-2212ph ase and some other second phases which include(Sr,Ca )CuO and Ca 2 PbO 4 phase,and without any2201and 2223phases is considered a g ood choic e for the fabrication of hig h J c Bi (Pb)-2223/Ag tapes.Accordingly,calcination of the precursor pow der just below the form ation temperature of 2223phase is th e most favorabl e.A maximum critical current density of 12kA/cm 2 was obtained.更多还原