Resistivity-temperature characteristics of sol gel YBa2Cu3Oy samples synthesized in flowing oxygen atmosphere

• 来源期刊: 中国物理（英文版）
• 关键词: sol gel YBa2Cu3Oy sample p-T curve resistivity phase transformation
• 年，卷（期）: 2004,（11）
• 页码范围: 1957-1961
• 页数: 5页
• 语种: 英文

摘要

The relationship of resistivity versus synthesizing temperature of sol gel YBa2Cu3Oy samples was studied when prepared under flowing oxygen conditions. A set of high-temperature p-T curves was obtained for the whole process.After the sample finished the test measuring, its resistivity was ρ300=9.83 × 10-3Ω·cm at room temperature. The ρ-T curve also showed that the orthorhombic-tetragonal phase transformation of sol-gel YBa2Cu3Oy sample occurred at 581℃ for the sample in the rising temperature process, but at 613℃ in the cooling process, lower than that of the samples made by using the conventional powder metallurgy methods.