摘要
以硅橡胶做为基体,通过掺杂导电碳黑和Al2O3纳米粉制成了富有弹性、导电性好、稳定性优良的复合材料,找出了材料导电性突变时碳黑掺杂的体积分数为38%;并对碳黑体积分率不同时的复合材料进行了压阻特性的测量,发现随着材料中碳黑体积分率的增加,材料的弹性变差;进一步利用超声波分散技术将Al2O3纳米粉分散到材料当中,发现纳米粉的加入改善了材料的导电性能和弹性性能.文章最后计算了材料的压阻灵敏度,发现所制备材料的压阻灵敏度可达1.5Ω/Pa.
Based on the silicone rubber, the composite material with good elasticity, fine conductivity, and reliable stabilization is prepared by adding electric carbon black and Al2O3 nanometer powders into it, and the volume proportion is found to be 38% when conductivity changes suddenly. The stress-resistance prop- erties of the composite materials with different volume proportion of carbon black are measured. The resuits show that the elasticity gets weak with the increase of the vohame proportion of carbon black in the material. Furthermore, the Al2O3 nanometer powders are dispersed into the material using the ultrasonic disperse technology and the properties of elasticity and conductivity of the material are improved greatly. At the end of this paper, the stress-resistance sensitivity of the materials is calculated and it reaches 1.5 Ω/Pa.
出处
《传感技术学报》
CAS
CSCD
北大核心
2007年第8期1732-1735,共4页
Chinese Journal of Sensors and Actuators
基金
陕西省自然科学基金项目资助(2004CS110005)
关键词
触压传感器
复合材料
硅橡胶
纳米AL2O3
压阻
tactile sensor
composite material
silicone rubber
nanometer Al2O3
piezoresistivity
