CAJ | 학술논문

部分熔化热处理工艺对Bi-2212/Ag带材Jc性能的影响
부분용화열처리공예대Bi-2212/Ag대재Jc성능적영향
Effects of Partial Melting Process on Jc of Bi-2212/Ag Tapes

万方数据

稀有金属材料与工程稀有金屬材料與工程 희유금속재료여공정
RARE METAL MATERIALS AND ENGINEERNG
2004年 8期 793-796 ,共4页

刘育松%张平祥%李成山%于泽铭%郑会玲%熊晓梅%刘奉生%王庆阳%姜冰%冯勇%周廉%Liu Yusong%Zhang Pingxing%Li Chengshan%Yu Zeming%Zheng Huiling%Xiong Xiaomei%Liu Fengsheng%Wang Qingyang%Jiang Bing%Feng Yong%Zhou Lian

류육송%장평상%리성산%우택명%정회령%웅효매%류봉생%왕경양%강빙%풍용%주렴%Liu Yusong%Zhang Pingxing%Li Chengshan%Yu Zeming%Zheng Huiling%Xiong Xiaomei%Liu Fengsheng%Wang Qingyang%Jiang Bing%Feng Yong%Zhou Lian

前驱粉末%Bi-2212/Ag带材%部分熔化前驅粉末%Bi-2212/Ag帶材%部分鎔化
전구분말%Bi-2212/Ag대재%부분용화
precursor%Bi-2212/Ag%partial melting

为了提高Bi-2212/Ag带的性能(主要指临界电流密度Jc),进行了部分熔化热处理工艺对带材Jc的实验.采用标准的4点法测量Jc,使用PW1700 XRD、SL20 SEM和EDX检验和研究带材的相组成和微观组织.实验表明:在流氧气氛下,烧结温度为860℃～880℃时,前驱粉末以Bi-2212为主相,同时含有少量的Bi-2201相、(Sr,Ca)Cu2O3相和富(Bi,Sr)相.在流氧气氛下,带材Jc性能对热处理工艺参数非常敏感.在实验条件范围内,优化后的热处理工艺参数为:熔化温度Tmax=890℃,熔化时间tmax＝10 min,冷却速率Rc＝2℃h-1;在保温温度为835℃时,保温时间ta=20 h,通过优化的部分熔化热处理工艺,在77 K、0 T下最后所制得带材的最大Ic=6 A,Jc=890 Acm-2.
위료제고Bi-2212/Ag대적성능(주요지림계전류밀도Jc),진행료부분용화열처리공예대대재Jc적실험.채용표준적4점법측량Jc,사용PW1700 XRD、SL20 SEM화EDX검험화연구대재적상조성화미관조직.실험표명:재류양기분하,소결온도위860℃～880℃시,전구분말이Bi-2212위주상,동시함유소량적Bi-2201상、(Sr,Ca)Cu2O3상화부(Bi,Sr)상.재류양기분하,대재Jc성능대열처리공예삼수비상민감.재실험조건범위내,우화후적열처리공예삼수위:용화온도Tmax=890℃,용화시간tmax＝10 min,냉각속솔Rc＝2℃h-1;재보온온도위835℃시,보온시간ta=20 h,통과우화적부분용화열처리공예,재77 K、0 T하최후소제득대재적최대Ic=6 A,Jc=890 Acm-2.
In order to improve the performances of Bi-2212/Ag tapes (mainly refer to crital current density Jc), the experiment for effects of partial melting process on Jc of the tapes was conducted. Standard 4-point method was used to measure Jc. PW1700 XRD, XL20 SEM and EDX were used to exam and study phase constitution and microstructure of the tapes. The results indicate that sintered at 860℃~880℃ in flowing oxygen atmosphere, Bi-2212 precursors have primary phase of Bi-2212 and a slight amount of Bi-2201 phase, (Sr, Ca) Cu2O3 phase and rich (Bi,Sr) phase. In flowing oxygen atmosphere, processing parameters have critical effects on Jc of the Bi-2212/Ag tape. The optimized processing parameters are that melting temperature Tmax is 890℃, melting time tmax is 10 min and cooling rate Rc is 2℃/h. At 835℃, the optimized holding time ta is 20 h. By optimizing partial melting process, the maximum Ic of the final tapes is 6 A and Jc is 890 A/cm2 at 77 K,0 T.