论文部分内容阅读
提出了一种结合溶液-溶胶-凝胶(SSG)法和溶液自蔓燃(Solution SHS)法的Bi系超导体原始粉末制备方法(溶液-溶胶-凝胶-自蔓燃法,SSGS).主要分两步:(1)利用SSG法制取成分均匀的湿凝胶;(2)利用Solution SHS法将湿凝胶在短时间内转变成低碳含量(<400×10~(-6))软团聚,超细(～0.3μm)的Bi系超导体原始粉末.克服了传统SSG法制备的粉末形成硬团聚、颗粒粗大和碳含量高的严重缺点,并使制粉周期大大缩短.制备的原始粉末可以在短时间内制备优质110K超导体.优化了获得成分均匀湿凝胶的工艺参数,并对SSG转变机制进行了探讨.
A preparation method of Bi-based superconductor powder (solution-sol-gel-self-ignite method, SSGS) combining solution-sol-gel method and solution SHS method is proposed. In two steps: (1) SSG method was used to prepare the wet gel with uniform composition; (2) The wet gel was changed into a low carbon content (<400 × 10 -6) soft by Solution SHS method in a short time Agglomeration and ultrafine (~ 0.3μm) Bi-based superconductor powder, which overcomes the serious disadvantages of powder agglomeration, coarse particle size and high carbon content prepared by the traditional SSG method and greatly shortens the milling cycle.The prepared original powder The high quality 110K superconductor can be prepared in a short period of time, the process parameters of obtaining homogeneous wet gel are optimized, and the mechanism of SSG transformation is also discussed.