Abstract The impact of titanium oxide (TiO 2 ) nanoparticles addition on the intra-granular and inter-granular properties of YBa 2 Cu 3 O 7-y (Y-123) were thoroughly investigated. Specimens were produced through the solid-state reaction (SSR) route by adding small contents of TiO 2 nano-entities. The phase identification was studied using the X-ray diffraction (XRD). The microstructure and the chemical composition were examined by scanning electron microscope (SEM) technique coupled with energy dispersive X-ray spectroscopy (EDXS) system. The electrical resistivity measurements were done using the conventional four probe technique. The intra-granular, inter-granular and transport critical current densities of the synthesized specimens were explored through measurements of magnetization, ac-susceptibility and current-voltage, respectively. The possible pinning mechanisms predominant in synthesized compounds are estimated. The obtained results show that small amount of TiO 2 nanoparticles improves the flux pinning capacity in Y-123 material.

中文翻译：

---

添加TiO 2 纳米颗粒的YBCO超导体具有更高的晶内和晶间性能

摘要 全面研究了氧化钛(TiO 2 ) 纳米粒子添加对YBa 2 Cu 3 O 7-y (Y-123) 晶内和晶间性能的影响。通过添加少量 TiO 2 纳米实体，通过固态反应 (SSR) 途径生产样品。使用X射线衍射（XRD）研究相识别。通过扫描电子显微镜 (SEM) 技术结合能量色散 X 射线光谱 (EDXS) 系统检查微观结构和化学成分。电阻率测量是使用传统的四探针技术完成的。分别通过测量磁化强度、交流磁化率和电流电压来探索合成样品的晶内、晶间和输运临界电流密度。估计了在合成化合物中占主导地位的可能的钉扎机制。所得结果表明，少量的TiO 2 纳米颗粒提高了Y-123材料的通量钉扎能力。