压敏超导体-金属-高分子复合材料研究  

Pressure Sensitive Superconductor-Metal-Polymer Composites

作　　者：常方高[1] 王少祥[1] 杨枫[1] 张娜[1] 马恒[1] 宋桂林[1] 

机构地区：[1]河南师范大学,河南新乡453007

出　　处：《稀有金属材料与工程》2008年第A04期193-195,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(60571063)资助

摘　　要：将高温超导材料YBa2Cu3O7+δ与硅橡胶复合,制备了一种电阻对压力敏感的超导体-高分子复合材料,并对不同温度下材料的物理性质进行了测量。结果表明这种材料的电阻率随压强的增加呈指数衰减,在10MPa压强作用下,材料的电阻率降低10个数量级,复合材料的电阻率及其对压强的敏感性随组分比例的不同而变化。研究发现这种超导-高分子复合材料的电阻率及其对压力的敏感性可以通过添加第3种金属组分来有效地调节;超导-金属-高分子复合材料的电阻率在150K以下有一个突然下降。Pressure sensitive superconductor-polymer composites were prepared by combining silicone rubber and high-TC superconductor YBa2Cu3O7＋δ powder. It was found that the resistivity of the composites decreased exponentially with increasing pressure： application of 10MPa pressure could result in a decrease of 10 orders of magnitude in resistivity. Both resistivity and its sensitivity to external pressure varied with the superconductor filler content, and could be adjusted effectively by the addition of a third metallic component. Resistivity of superconductor-metal-polymer composite decreased sharply below 150 K.

关 键 词：超导 高分子 复合材料 压敏 

分 类 号：TB332[一般工业技术—材料科学与工程]