Conventional solid-state reaction technique was used to prepare bulk samples with nominal composition of (Bi, Pb) 2 Sr 2 Ca 2 Cu 3 O 10+ δ superconductors. The prepared powder was pelletized at different pressure (P = 0.3, 0.7, 1.0, 1.4 and 1.9 GPa) before the calcination process. Structural parameters and phase purity were evaluated using x-ray diffraction (XRD). The formation of the tetragonal major phase is improved with increasing the pelletization pressure up to 1.4 GPa. The morphology and elemental compositions were performed by using scanning electron microscope (SEM) and energy dispersive x-ray spectroscopy (EDX), respectively. The results showed the enhancement of the grain alignment at an optimum pelletization pressure of 1.4 GPa with a decrease in the porosity percentages. Superconducting transition temperature (T c ) and the critical current density (J c ) were obtained by means of DC electrical r...

中文翻译：

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造粒压力对（Bi，Pb）-2223超导体物理机械性能的影响

采用常规的固态反应技术制备了标称成分为（Bi，Pb）2 Sr 2 Ca 2 Cu 3 O 10+δ超导体的本体样品。在煅烧过程之前，将制备的粉末在不同的压力（P = 0.3、0.7、1.0、1.4和1.9 GPa）下造粒。使用X射线衍射（XRD）评估结构参数和相纯度。随着造粒压力增加到1.4 GPa，四方主相的形成得到改善。形态和元素组成分别通过使用扫描电子显微镜（SEM）和能量色散X射线光谱仪（EDX）进行。结果表明，在1.4 GPa的最佳造粒压力下，晶粒排列增强，孔隙率降低。