Effects of Heat Treatment Conditions on the Critical Current Densities of Ba2YCu3O7-y Films Prepared by the Dipping-Pyrolysis Process
Effects of Heat Treatment Conditions on the Critical Current Densities of Ba2YCu3O7-y Films Prepared by the Dipping-Pyrolysis Process
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DOI：
10.1143/jjap.29.l940
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发表时间：
1990-06
影响因子：
1.5
通讯作者：
T. Kumagai;T. Manabe;W. Kondo;H. Minamiue;S. Mizuta
中科院分区：
文献类型：
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作者：
T. Kumagai;T. Manabe;W. Kondo;H. Minamiue;S. Mizuta
采用热重-差热分析（TG-DTA）、X射线衍射（XRD）和电阻率测量等方法研究了温度和气氛对乙酰丙酮金属溶液热分解制备BaCO 3、Y2 O3和CuO的BYCO生成反应的影响。发现该反应在低于900°C和低氧分压下容易进行。采用浸渍-热分解法制备了超导Ba_2YCu_3O_（7-y）薄膜，其Tc为90 K，J_c（77 K）为300-400 A/cm ~ 2。在820°-880 ° C温度范围内，氧分压ρ（O_2）=1×10 ~（-3）-2×10 ~（-4）atm下进行热处理，然后进行氧退火。
The effects of temperature and atmosphere on the BYCO formation reaction of BaCO3, Y2O3 and CuO, prepared by the pyrolysis of metal acetylacetonate solution, were examined by TG-DTA, XRD and resistivity measurement. This reaction was found to proceed readily below 900°C under low oxygen partial pressures. Superconducting Ba2YCu3O7-y films with Tc,zero\cong90 K and Jc(77 K)=300–400 A/cm2 were prepared by the dipping-pyrolysis process using the above solution through heat treatments at 820°–880°C under controlled low oxygen partial pressures of ρ(O2)=1×10-3–2×10-4 atm followed by O2 annealing.