Carbon Dioxide Controlled Thermal-Decomposition Reactions for Preparation of High Quality YBCO Films Derived from Fluorine-Free Solution

Carbon Dioxide Controlled Thermal-Decomposition Reactions for Preparation of High Quality YBCO Films Derived from Fluorine-Free Solution
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二氧化碳控制的热分解反应用于无氟溶液制备高质量 YBCO 薄膜

DOI:
10.1007/s10948-013-2235-z
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发表时间:
2014
影响因子:
1.8
通讯作者:
Xujuan Zhang
Xujuan Zhang
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Zhao, Gaoyang;Bai, Yan;Wu, Chuanbao;Xujuan Zhang

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我们报道了通过二氧化碳控制的热分解反应制备高质量的YBCO薄膜。在YBCO凝胶膜的热解过程中,当co2进入热处理气氛时,低熔点Ba(OH)2相转变为高熔点baco3相,热解后的YBCO膜表面形貌相当光滑;在随后的结晶和退火氧化过程中,将baco3相转化为Ba(OH)2相,作为Ba资源生成YBCO相。研究发现,通过引入足够的二氧化碳和水蒸气来控制含ba化合物之间的转化反应,可以得到表面光滑且具有优异超导性的YBCO膜。
We report the fabrication of high quality YBCO film through a carbon dioxide controlled thermal-decomposition reaction. During the pyrolysis process of the YBCO gel film, the low melting-point Ba(OH)2phase was converted to a high melting-point BaCO3phase when CO2was introduced into the heat treatment atmosphere, thus resulting in a quite smooth surface morphology of the pyrolyzed YBCO film; Then the BaCO3phase was converted to Ba(OH)2phase used as the Ba resource to produce the YBCO phase during the subsequent crystallization and annealing oxidation process. It is found that YBCO film with smooth surface and excellent superconductivity can be obtained through controlling the conversion reaction between the Ba-contained compounds by introducing adequate carbon dioxide and water vapor.
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影响因子: 1.8
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