| 液相烧结制备织构（123＋211）的YBa2Cu3O7—x超导体 |
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| 引用本文： | 樊永年,汤宝珍,乔桂文.液相烧结制备织构（123＋211）的YBa2Cu3O7—x超导体[J].金属学报,1993,29(10):87-91. |
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| 作者姓名： | 樊永年 汤宝珍 乔桂文 |
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| 作者单位： | 中国科学院金属研究所中国科学院国际材料物理中心
(樊永年)，中国科学院金属研究所
(汤宝珍)，中国科学院金属研究所(乔桂文) |
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| 摘 要： | 用液相烧结法研究了制备名义组成（１２３＋２１１）织构的ＹＢａ２Ｃｕ３Ｏ７－ｘ超导体。在１２３（ＹＢａ２Ｃｕ３Ｏ７－ｘ）粉中掺适量的２１１（Ｙ２ＢａＣｕＯ５）粉消除ＢａＣｕＯ２在晶界上沉积。在包晶转变温度附近降低冷却速率允许有足够时间沿ａ－ｂ面进行质量转移，ａ－ｂ面是最快的生长面，晶粒长度受质量转移速率控制。ＸＲＤ，ＳＥＭ，ＥＤＸＡ分析指出，晶粒是长条形，取向垂直于ｃ轴，平行于表面。样品１２３具有强
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| 关 键 词： | 烧结材料 液相 定向凝固 超导体 |
| 收稿时间： | 1993-10-18 |
| 修稿时间： | 1993-10-18 |
ON OF TEXTURAL YBa_2Cu_3O_(7-x) WITH NOMINAL COMPOSITION (123+211) BY LIQUID PHASE SINTERING |
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| FAN Yongnian,TANG Baozhen,QIAO Guiwen International Centre of Materials Physics.ON OF TEXTURAL YBa_2Cu_3O_(7-x) WITH NOMINAL COMPOSITION (123+211) BY LIQUID PHASE SINTERING[J].Acta Metallurgica Sinica,1993,29(10):87-91. |
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| Authors: | FAN Yongnian TANG Baozhen QIAO Guiwen International Centre of Materials Physics |
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| Affiliation: | FAN Yongnian,TANG Baozhen,QIAO Guiwen International Centre of Materials Physics,Institute of Metal Research,Academia Sinica,Shenyang Institute of Metal Research,Academia Sinica,Shenyang |
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| Abstract: | To eliminate the deposition along BaCuO_2 grain boundaries, the 211
(Y_2Ba_2CuO_5) powder was properly doped to the 123 (YBa_2Cu_3O_(7-x) compounds. Sufficient
time for mass transfer along a-b plane was allowed by lowering the cooling rate nearby the
temperature of peritectic transformation. Since the plane a-b is the fastest growing one, the
length of grains is controlled by the rate of mass transfer. XRD, SEM and EDXA analyses
revealed that the grains are strip-shaped, their orientation is perpendicular to c-axis and par-
allel to surface a-b plane. Thus, the compound 123 (YBa_2Cu_3O_(7-x) has a strong textural
structure. |
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| Keywords: | liquid phase sintering texture peritectic transformation YBa_2Cu_3O_(7-x) Y_2Ba_2CuO_5 directional solidification |
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