亚微米超导YBa2Cu3O6+x颗粒由低温合成路径制成
概括
研究人员开发了一种新方法来合成超导极管YBa(2)Cu(3)O(6+x) (极管123) 的超导极管. 这个过程首先涉及到创建四边形123,然后氧化它以达到87K的超导.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 超导电性 超导电性 超导电性
背景情况:
- 超导体正方体YBa(2)Cu(3) O(6+x) (正方体123) 通常通过氧化缺氧四角形相 (四角形123) 形成.
- 一个可靠的合成路径,为高品质的四角形123是生产超导极管123.3. orthorhombic至关重要.
研究的目的:
- 建立一种新型合成途径,用于生产超导极管形YBa(2) Cu(3) O(6+x).
- 为了证明在这种合成中使用溶液衍生,无碳前体的可行性.
主要方法:
- 溶液衍生的无碳前体 (含水氧化物,低化物) 在惰性大气中在650700°C的温度下分解,产生四角醇123.3.
- 随后在400°C的温度下对合成的四角形123相进行氧化,以产生正方形123.
- 使用梅斯纳效应和特定热量测量,对超导电的表征.
主要成果:
- 开发了一种可复制的合成路径,从无碳前体中生产四角形YBa(2)Cu(3)O(6+x).
- 四角形相的氧化产生了亚微米粒子的正方体YBa(2)Cu(3)O(6+x).
- 由此产生的正方体123材料表现出超导性,T (c) 开始时约为87 K.
结论:
- 开发的方法提供了一种有效的途径,可以通过中间四角形相合成超导极管YBa(2) Cu(3) O(6+x).
- 使用溶液衍生前体为生产高质量的超导材料提供了一种可控和潜在可扩展的方法.
- 这项工作证实了YBa(2)Cu(3)O(6+x) 中四角形和正角形相之间的关系及其超导特性.
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