【摘要】 本文研究了Ｔｌ＿２Ｂａ＿２Ｃａ＿２Ｃｕ＿３Ｏ＿ｘ（简称２２２３）单相超导块材的制备工艺。Ｘ射线衍射谱的分析和交流磁化率测量结果表明，对于名义组分为Ｔｌ＿２Ｂａ＿２Ｃａ＿２Ｃｕ＿３Ｏ＿ｘ的配料，在相当宽的温度范围（８７５℃～９５０℃）内烧结都有２２２３相生成。在８９７℃烧结２ｈ得到了纯的２２２３单相样品，其Ｔｃ（Ｒ＝０）值达１２０Ｋ。更多还原

【Abstract】 The preparation of monophase Tl₂Ba₂Ca₂Cu₃O_x bulk materials was investigated. Itwas found that the 2223 phase could be formed in a quite wide rang of temperature（875℃～905℃）.The sample sintered at 897 ℃ for 2 hours was demonstrated to be pure Tl-2223monophasic bulk material using X-ray diffraction and A.C. susceptibility. That Tc（R=0）=120 K was obtained from R-T curve for this sample.更多还原