Improvement in structure and superconductivity of YBa2Cu3O6+δ ceramics superconductors by optimizing sintering processing

被引：6

作者：

Jin Fei ^{[1
]}

Zhang Hui ^{[1
]}

Wang Wenzhang ^{[1
]}

Liu Xiang ^{[1
]}

Chen Qingming ^{[1
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Mat Sci & Engn, Kunming 650093, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2017年 / 35卷 / 01期

基金：

中国国家自然科学基金;

关键词：

YBa2Cu3O6+delta; sol-gel method; sintering processing; superconducting property; rare earths; OXYGEN-CONTENT; FLUX METHOD; YBCO; YBA2CU3O7-DELTA; TEMPERATURE; FABRICATION; BULK;

D O I：

10.1016/S1002-0721(16)60177-1

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Polycrystalline YBa2Cu3O6+delta bulks were synthesized by sol-gel method. Sintering processing played a vital role in the evolution of phase structure and microstructure, and thus significantly influenced their superconducting properties. The influence of calcination temperature, sintering temperature, on the bulks structure, morphology and superconducting behaviors were investigated. The results showed that the oxygen content drastically increased with calcination temperature and sintering temperature. The SEM images revealed that the grains grew up monotonously with increase of calcination temperature. With increased calcination and sintering temperature, the resistivity was reduced gradually and the superconducting properties increased. Moreover, it was found that the optimal superconducting properties (with the highest superconducting transition temperature T-c(onset) and the narrowest transition width Delta T) were obtained at calcination temperature of 900 degrees C and sintering temperature of 950 degrees C.

引用

页码：85 / 89

页数：5

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