Effects of binder addition on the mechanical properties of bulk Y-Ba-Cu-O superconductors

被引：4
|
作者：
Seki, H. [1 ]
Wongsatanawarid, A. [1 ]
Kobayashi, S. [1 ]
Ikeda, Y. [1 ]
Murakami, M. [1 ]
机构：
[1] Shibaura Inst Technol, Murakami Lab, Koto Ku, Tokyo 1358548, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2010年 / 470卷 / 20期
关键词：
Y-Ba-Cu-O; Bulk; Mechanical strength; Trapped magnetic field; Binder; Hardness; POWDER;
D O I：
10.1016/j.physc.2010.05.068
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We studied the effects of binder addition on the mechanical properties of bulk Y-Ba-Cu-O superconductors. We prepared YBa(2)Cu(3)O(y), Y(2)BaCuO(5) powders and polyvinyl alcohol mixed with water as a binder. These raw materials were mixed, and the binder-added powders were pressed into pellets. The hardness of the green compacts with binder is higher than that without the binder. However, the hardness of green compacts with 8% binder is the same as that with 4% binder. The maximum compression strength of the precursor with binder is higher than that without binder. Equally, the maximum strength of the green compacts with 8% binder is higher than that with 4% binder. The differential thermal analysis measurements showed that the exothermic reaction due to the decomposition of the organic binder started at 550 degrees C and gradually proceeded with further heating. After de-binder treatment. BaCO(3) powders were produced on the green compacts. The green compacts were subjected to melt-processing. We also measured trapped magnetic fields of binder-added bulk Y-Ba-Cu-O superconductors with a Hall probe scanning device. Trapped magnetic field of the bulk added with 4% is higher than that of the binder-free bulk. Hence, Y-Ba-Cu-O bulk with suitable amount of binder shows good influence for mechanical strength and trapped magnetic field. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：1177 / 1180
页数：4
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