【摘要】 用定向凝固法已成功地生长出Bi-Sr-Ca-O 2212相的超导大单晶,最大的单晶尺寸达到19×3×2mm³。定向生长的单晶（001）面平行于生长方向,[100]方向为单晶的定向生长方向。劳厄像表明大晶体确为单晶,其质量比其它方法生长的单晶要高。氧气中退火后的单晶电阻测量和交流磁化率测量表明,零电阻温度T_c（0）=81.5k。更多还原

【Abstract】 Superconducting single crystals of Bi-Sr-Ca-Cu-O 2212 phase have been sucessfully grown by a directional solidification method. The maximum size of single crystal reached 19+ 3×mm3. The (001) plane of the crystals is parallel to the growth direction. The crystals tend to grow along the [010] direction. Back-reflection Laue pattern revealed that the large crystal is indeed one single crystal. Measurements of electrical resistivity and ac susceptibility showed that Tc(zero) of the single crystals annealed in O2 was 81.5 K.更多还原