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高Tc Y-Ba-Cu-O系列超导材料,一般是以BaCO_3,Y_2O_3,CuO为原料,按一定化学成分配比,经混料、研磨、成型、预烧,然后在空气气氛下,不低于1000℃温度中烧结,继而进行高温淬火,最后在氧气氛中,经400℃退火处理而成的。 Y-Ba-Cu-O超导材料的氧缺位数以及后处理工艺中补氧量的研究,对寻求最佳制备工艺和了解超导材料的机理有着十分重要的意义。我们使用日本产Rigaku TG-DTA(热重-差热分析)仪,分别对原材料Y_2O_3,BaCO_3,CuO(均为分析纯)和按
High Tc Y-Ba-Cu-O series of superconducting materials, generally based on BaCO_3, Y_2O_3, CuO as raw material, according to a certain chemical composition, after mixing, grinding, molding, calcination, and then in the air, Below 1000 ℃ sintering temperature, followed by high-temperature quenching, and finally in oxygen atmosphere, annealing at 400 ℃ made. The oxygen vacancy number of Y-Ba-Cu-O superconducting materials and the amount of oxygen in the post-treatment process are of great significance for seeking the best preparation technology and understanding the mechanism of superconducting materials. We use the Japanese Rigaku TG-DTA (TG-DTA) instrument, respectively, raw materials Y_2O_3, BaCO_3, CuO (all analytical grade) and press