Studies of upgrading of its performance and magnetization technique of Ag-bearing Sm123-type superconducting permanent magnet materials

含银Sm123型超导永磁材料性能升级及磁化技术研究

• 批准号: 11305051
• 负责人: MIZUTANI Uichiro
• 金额: $ 23.41万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11305051/
• 关键词: Sm123 bulk superconductor; pulsed field; magnetic field generator; trapped field; static field magnetization; バルク超伝導体; パルス着磁; 超伝導永久磁石; Sm123超伝導体; Ag添加Sm123超伝導体

The present work aims at developing c-axis oriented large Sm123 bulk superconductors and constructing a face-to-face-type magnetic field generator capable of producing magnetic field of more than 2 Tesla in open space, which is roughly 10 times larger than the magnetic field produced by ordinary Nd-Fe-B magnet.( 1 ) In 1999, we could develop Ag-bearing Sm123 superconductors with 36 mm in diameter and achieved a maximum trapped field of 3.8 Tesla on its surface by pulsed field at 30 K cooled by the refrigerator. We could successfully analyze the motion of quantized magnetic fluxes penetrated into the Sm123-superconductor upon the operation of a pulsed field at temperatures 30-77 K.( 2 ) The Ag-bearing Sm123 superconductor was also magnetized by static field up to 6.7 Tesla on its surface. By utilizing this strong field, we could fully magnetize the Nd-Fe-B plate with the dimension 50x50x0.5 mm by scanning it over the magnetic field thus produced. This was reported in Chunichi Newspaper … More on November 18, 1999.( 3 ) In 2000, we constructed a face-to-face-type magnetic field generator by mounting two almost identical Ag-bearing Sml23 superconductors with 36 mm in diameter, which were cooled to 35 K by a refrigerator. These two superconductors were magnetized by pulsed field. The trapped field of 2.8 Tesla was obtained in the air gap of 2mm sandwiched by these two superconductors. This was reported in Nikkan-Kogyo Newspaper on January 24, 2000. This demonstrated the opening of a new era in which we can use strong magnetic field exceeding 2 Tesla in open space.( 4 ) In January 2002, the Ag-bearing Sm 123 superconductor with the diameter of 60 mm was successfully synthesized. The installation of these two large superconductors into the field generator could produce the magnetic field of 3.0 Tesla in the air gap of 5mm, further strengthening our proposal concerning the availability ofa very strong magnetic field exceeding 2 Tesla by using the large bulk superconductors with a high trapped field performance. Less

本工作的目的是开发c轴取向的大尺寸Sm 123超导体，并构建一个面对面式的磁场发生器，能够在开放空间产生超过2特斯拉的磁场，这大约是普通Nd-Fe-B磁体产生的磁场的10倍。（1）1999年，我们研制出了直径为36 mm的含银Sm_（123）超导体，并在30 K的温度下，用脉冲场制冷，在其表面获得了3.8T的最大俘获场。在30-77 K的脉冲磁场作用下，我们成功地分析了量子化磁通在Sm_（123）超导体中的运动。（2）含Ag的Sm_（123）超导体在6.7T的静磁场作用下也发生了磁化。利用这种强磁场，我们可以通过在这样产生的磁场上扫描来完全磁化尺寸为50 × 50 × 0.5 mm的Nd-Fe-B板。这是中日新闻报道的 ...更多信息 1999年11月18日（3）在2000年，我们通过安装两个直径为36 mm的几乎相同的含银Sm 123超导体，用制冷机冷却到35 K，构建了面对面式磁场发生器。这两种超导体被脉冲磁场磁化。在两个超导体夹在中间的2 mm空气隙中获得了2.8T的俘获场。这是2000年1月24日日刊工业新闻报道的。这表明了一个新时代的开启，我们可以在开放空间中使用超过2特斯拉的强磁场。（4）2002年1月成功合成了直径为60 mm的含银Sm 123超导体。将这两个大超导体安装到磁场发生器中可以在5 mm的空气间隙中产生3.0特斯拉的磁场，进一步加强了我们关于使用具有高捕获场性能的大块超导体获得超过2特斯拉的非常强的磁场的建议。少

项目成果

Uichiro Mizutani: "Synthesis of c-axis oriented single-domain Sm123 superconductors capable of trapping 9Tesla at 25K and its application to a strong magnetic field generator"Materials Science and Engineering B. 65. 66-68 (1999)

水谷宇一郎：“能够在25K捕获9特斯拉的c轴取向单畴Sm123超导体的合成及其在强磁场发生器中的应用”材料科学与工程B.65.66-68（1999）

U.Mizutani: "Synthesis of c-axis oriented RE-Ba-Cu-O (RE=Sm and Nd) superconductors and performance of superconducting permanenet magnets activated by pulsed fields"Proceedings of 12th Int. Symp. on Superconductivity (ISS'99). 1. 431-436 (1999)

U.Mizutani：“c 轴取向 RE-Ba-Cu-O（RE=Sm 和 Nd）超导体的合成以及脉冲场激活的超导永磁体的性能”第 12 期 Int 论文集。

H.Ikuta et al.: "Pulsed field magnetization of melt-processed Sm-Ba-Cu-O"Supercond Sci. and Technol.. 13. 846-849 (2000)

H.Ikuta 等人：“熔融加工的 Sm-Ba-Cu-O 的脉冲场磁化”Supercond Sci。

Y.Yanagi: "Trapped field distribution on Sm-Ba-Cu-D bulk superconductor by pulsed field magnetization"Proceedings of 12th Int.Symp.on Superconductivity(ISS'99). 1. 470-472 (1999)

Y.Yanagi：“脉冲场磁化对 Sm-Ba-Cu-D 体超导体的俘获场分布”第 12 届 Int.Symp.on 超导论文集（ISS99）。

U.Mizutani: "Applications of superconducting permanent magnets driven by static and pulsed fields"Supercond. Sci. Technology. 13. 836-840 (2000)

U.Mizutani：“静态场和脉冲场驱动的超导永磁体的应用”Supercond。