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本文介绍了名义配比为 YBa_2(Cu_(1-x)Bi_x)O_(7-y)(x=0～0.25,0.3～0.9)的系列陶瓷材料的制备。在x<0.25时,T_(ce)仍保持在液氮温区,但 Bi 的掺入大大增强了材料的显微硬度和致密度,超导电性能十分稳定。随着 x 的增大(x≥0.05),出现了一种 ABO_3型的晶格参数较大的立方新相物质 Ba_2YBiO_6,可能的空间群为Fm3m(225),它在液氮温区是顺磁性的。第二相氧化物粒子的(氵弥)散强化是显微硬度提高的主要原因。少量 Bi的掺入,还有增强 Cu-O 喇曼讯号的作用。还进行了其它性能的测试。
In this paper, a series of ceramic materials with nominal composition of YBa_2 (Cu_ (1-x) Bi_x) O_ (7-y) (x = 0 ~ 0.25 and 0.3 ~ 0.9) At x <0.25, T_ (ce) remains at liquid nitrogen temperature, but the incorporation of Bi greatly enhances the microhardness and density of the material, and the superconductivity is very stable. With the increase of x (x≥0.05), a cubic new phase material Ba_2YBiO_6 with large lattice parameters of ABO_3 type appears, the possible space group is Fm3m (225), which is paramagnetic in the liquid nitrogen temperature region of. The second phase oxide particles (Mi Mi) dispersion strengthening is the main reason for the increase in microhardness. The incorporation of a small amount of Bi, but also enhance the role of Cu-O Raman signal. Other performance tests have also been conducted.