用扩散法制备<strong>MgB<sub>2</sub></strong>块材的研究进展

用扩散法制备MgB₂块材的研究进展

赵万里, 索红莉, 刘敏, 马麟, 戴银明, 张子立

Research Progress in Preparation of MgB₂ Bulk by Diffusion Method

ZHAO Wanli, SUO Hongli, LIU Min, MA Lin, DAI Yinming, ZHANG Zili

表1 部分用Mg-RLI法合成的MgB₂超导体

Table 1 Summary of MgB₂ superconductors synthesized by Mg-RLI method

Reference	Shape	Experimental condition	Size	Critical current density	Other property
[11]	Cylindrical	1223 K, 3 h	D = 17 mm	4.2 K, 10 T, J_c＞10 A/mm²;	T_c= 39~40 K; ρ = 2.40 g/cm³
[12]	Rod	1173 K, 3 h	L₁= 110 mm	4.2 K, 10 T, J_c≈ 0.9 A/mm²;	ρ = 2.31 g/cm³
[12]	Rod	1173 K, 3 h	L₂= 75 mm	4.2 K, 7 T, J_c≈ 1.1 A/mm²;	ρ = 2.09 g/cm³
[13]	Rod	1173 K, 3 h	D = 10 mm，L = 100 mm	4.2 K, 5 T, J_c＞10 A/mm²;	ρ = 2.30 g/cm³
[20]	Rod	1173 K, 3 h	D = 10 mm，L = 100 mm	20 K, 3 T, J_c1= 10~20 A/mm² J_c2≈ 50 A/mm²	ρ_L = 2.35 g/cm³
	Tubular	1173 K, 2 h	L = 260 mm, D_int= 7 mm, D_out= 9 mm
	Cylinder	1173 K, 2.5 h	L = 58.74 mm，D_int= 25.57 mm，D_out= 48.25 mm
	Large cylinder	1123 K, 3 h	L = 75 mm，D_out= 100 mm，D_int= 10 mm
	Ring	1123 K, 1 h	D_int= 10 mm，D_out= 15 mm，L = 9 mm
[21]	Superconductor insert	1173 K, 3 h	D_max= 54 mm，D_min= 20 mm	4.2 K, 4 T, J_c≈ 64.52 A/mm²	The distribution of magnetic field is more uniform after magnetization