摘要
为探讨硅橡胶/镍粉复合材料的力敏性能,研究了不同掺量镍粉填充硅橡胶复合材料试样的电阻随拉应力、压应力的变化规律,并结合扫描电镜观察进行了机理分析。研究结果表明,所制备的硅橡胶/镍粉复合材料试样的电阻随拉、压应力的增加而减小,镍粉掺量越大,电阻对应力变化越敏感;在2MPa的拉、压应力作用下,硅橡胶/镍粉复合材料试样的电阻变化最大分别可达11个和12个数量级。硅橡胶/镍粉复合材料优异的力敏效应是由量子隧道效应导致的。
In order to explore the force-sensitivity of silicon rubber-matrix composites filled with nickel powder,the variation regularity of the electrical resistance of silicon rubber-matrix composites filled with different content of nickel powder with tensile and compressive stress was studied,and its generation mechanism was discussed by using scanning electron microscope （SEM）.Experimental results indicate that the electrical resistance of the presented silicon rubber-matrix composites filled with nickel powder decreases with compressive/tensile stress.The sensitivity of electrical resistance to stress increases with the content of nickel powder in the composites.The electrical resistance changes by 12 and 11 orders of magnitude maximum respectively under 2 MPa compressive and tensile stress.The silicon rubber-matrix composites filled with nickel powder have obvious pulling-sensitivity,which is due to the quantum tunneling effect.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2010年第11期97-99,103,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(50677011)
教育部博士点基金新教师项目(20070213080)
哈尔滨理工大学优秀拔尖创新人才培养计划资助项目
关键词
镍粉
硅橡胶
力敏性
应力
电阻
nickel powder
silicon rubber-matrix composites
force-sensitivity
stress
electrical resistance
