Bi—Pb—Sr—Ca—Cu—O系相关系研究的最新进展

围绕给Ｂｉ系超导材料研究提供必要的信息，综述了１９９１年以来Ｂｉ－Ｐｂ－Ｓｒ－Ｃａ－Ｃｕ－Ｏ系相关系研究的最新结果。主要包括Ｃａ－Ｃｕ－Ｏ三元系，Ｓｒ－Ｃｕ－Ｏ三元和纱，Ｂｉ２Ｏ３－ＣｕＯ伪二元系，（Ｂｉ，Ｐｂ）２Ｓｒ２ＣｕＯｘ－ＣａＣｕＯ２伪二元系，Ｂｉ２Ｏ３－ＣａＯ－ＣｕＯ伪三元系，Ｂｉ２Ｏ３－ＳｒＯ－ＣａＯ伪三元系，Ｂｉ２Ｏ３－ＳｒＯ－ＣｕＯ－ＭＯ（Ｍ为Ｃａ，Ｐｂ）伪四元系。此外，还讨论了与     

银在铋系高温超导体中的作用及应用

从五个方面综述了银在Ｂｉ－Ｐｂ－Ｓｒ－Ｃａ－Ｃｕ－Ｏ系（ＢＰＳＣＣＯ）超导体中的作用及应用，包括：（１）银与铋系超导体的基本复合方式；（２）银与Ｂｉ－Ｐｂ－Ｓｒ－Ｃａ－Ｃｕ－Ｏ系的物理化学作用；（３）银复合对铋系超导相生长的影响；（４）银复合对铋系超导体超导电性的影响，（５）银复合对铋系超导体材料力学性能的影响。     

β—C^TM合金的性能简介

按照热力学原理，分析了草酸盐共沉淀法制备Ｂｉ－Ｐｂ－Ｓｒ－Ｃａ－Ｃｕ－Ｏ系超导体原始粉末必须优先考虑的两个问题：沉淀方式和沉淀介质。并用实验作了验证。结果表明，反序滴定方式和低表面张力及低粘度的介质有利于维持沉淀产物中成分的均匀性。     

钛基复合材料的红外渗透和连接

迄今人们在Ｂｉ系超导体粉末制备中尝试和应用过的方法有：传统的固态反应法，溶液自蔓延高温合成法，共沉淀法，溶胶－凝胶法，冰冻干燥法，溶剂蒸发法以及微乳胶基粉末合成法，本文详细论述了这些方法的原理、优缺点及其在Ｂｉ系超导体粉末制备中的应用。     

Solution-sol-gel-SHS process of quickly synthesizing bismuth-based superconductor precursor powder

A new process (solution-sol-gel-SHS,SSGS) based on the combination of the advantages of solution-sol-gel (SSG) process and solution self-propagating high-temperature synthesis (SHS) process has been developed to synthesize bismuth-based superconductor precursor powder.The new process consists of two main steps: (i) SSG process is used to prepare homogeneous wet gel;(ii) solution SHS process is carried out to transit wet gel to soft-agglomerated ultrafine (~0.3μm) precursor powder with low carbon content (<400×10-6).The new process has overcome many serious shortcomings of traditional SSG-processed powder such as hard agglomerate,coarse particles and high carbon content,and also greatly shortened the powder preparation period.The powder can be sintered into 110K 2223 superconductor with excellent quality in a short time.The process parameters to obtain homogeneous wet gel are optimized and SSG transition mechanism is also discussed.