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- Title
The phase conversion of precursor powders for powder melting process YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7− x </sub> superconductors.
- Authors
Feng Jianqing; Lu Yafeng; Zhou Lian; Zhang Pingxiang; Xu Xiaoyan; Shaokai, Chen; Zhang Cuiping; Xiong Xiaomei; Liu Guoqing
- Abstract
The effects of heating rate and holding time on the formation of YBa2Cu3O7− x phase in precursor powders for YBa2Cu3O7− x superconducting bulks prepared by powder melting process have been investigated. The phase conversion of the precursor powders is studied by X-ray diffraction and found to be different for different heating rates during heating. The YBa2Cu3O7− x phase is formed during heating to peritectic temperature at 100 and 400 °C/h, but not at 6,000 °C/h. The longer the holding time, the more the amount of YBa2Cu3O7− x phase between 880 °C and about 950 °C. The results are useful for understanding the mechanism of powder melting process and controlling the process conditions.
- Subjects
X-ray diffraction; HEATING; FUSION (Phase transformation); POWDERS; TEMPERATURE; HEAT
- Publication
Journal of Materials Science: Materials in Electronics, 2008, Vol 19, Issue 11, p1069
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-007-9468-1