Synthesis and Dispersity of YBCO Powder Produced by Oxalic Acid Precipitation Method

Abstract:

The YBCO powder was prepared by oxalic acid precipitation method and consequent annealing. The correlation between pH values of oxalic acid solution and the precipitation percentage of precursors were analysed based on thermodynamics analysis. The differential scanning calorimetryanalysis (DSC) was used to confirm the synthetic technological parameter. The phases of powder in each process were investigated by XRD. The microstructures of each powder were tested by SEM and TEM. The mean grain size was calculated by the scherrer’s equation. The test results indicated that the YBCO powder with high purity, less impurities, smaller particle, but severe agglomeration, was Y123 when annealing at 900°C. However, adding dispersants could effectively solve the severe agglomeration. The size of YBCO particles was nanosized and coincided with the calculation.

• Periodical: Key Engineering Materials (Volumes 645-646)
• Pages: 145-150
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.645-646.145
• Online since: May 2015
• Authors: Ai Qin Wang*, Hui Hui Han, Min Li, Jing Pei Xie, Qing Jie Wu, Dou Qin Ma
• Keywords: Agglomeration, Dispersity, Oxalic Acid Precipitation Method, YBCO Powder

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