Please wait a minute...
Chin. Phys. B, 2009, Vol. 18(2): 0652    DOI: 10.1088/1674-1056/18/2/043
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES Prev   Next  

Enhanced piezoresistivity in Ni--silicone rubber composites

Wang Shao-Xianga, Chang Fang-Gaob, Yang Fengb, Zhang Nab, Song Gui-Linb
a College of Physics and Information Engineering, Henan Normal University, Xinxiang 453007, China; b College of Physics and Information Engineering, Henan Normal University, Xinxiang 453007, China
Abstract  This paper reports that the nickel--silicone rubber composites with enhanced piezoresistivity were synthesized with much reduced nickel concentration. A large piezosensitivity of 0.716/kPa and a gauge factor of 600 have been obtained for a composite sample with filler-polymer ratio of 2.7:1 by weight. Measurements of resistance as a function of uniaxial force reveal that the piezoresistance arises predominantly from the internal heterogeneity of the material and the effect of geometrical changes of samples under pressure is neglectably small. The nonlinear current--voltage characteristic of the composite depends strongly on the filler content, the initial compression and the electrical current flowing in the sample. Ohmic behaviour has been observed only in the highly compressed samples. The breakdown strength decreases with increasing filler content of the composite. Both I-V and R-f characteristics indicates that the resistivity of the composites decreases with electrical field, suggesting that the composite may also be used to make voltage sensitive resistors for protecting circuits. All the experimental results favour a quantum tunnelling mechanism of conductivity. It finds that the concept `negative resistance', often used to describe the phenomena that current decreases with increasing voltage, is not appropriate and should be avoided.
Keywords:  I-V characteristics      voltage sensitive resistors      piezoresistivity      quantum tunnelling  
Received:  11 August 2008      Revised:  31 August 2008      Published:  20 February 2009
PACS:  72.20.Fr (Low-field transport and mobility; piezoresistance)  
  72.80.Tm (Composite materials)  
  73.40.Gk (Tunneling)  
  81.05.Qk (Reinforced polymers and polymer-based composites)  
Fund: Project supported by National Natural Science Foundation of China (Grant No 60571063), and partially sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry.

Cite this article: 

Chang Fang-Gao, Yang Feng, Wang Shao-Xiang, Zhang Na, Song Gui-Lin Enhanced piezoresistivity in Ni--silicone rubber composites 2009 Chin. Phys. B 18 0652

[1] A new aluminum iron oxide Schottky photodiode designed via sol-gel coating method
A. Tataroğlu, A. A. Hendi, R. H. Alorainy, F. Yakuphanoğlu. Chin. Phys. B, 2014, 23(5): 057504.
[2] F4-TCNQ concentration dependence of the current–voltage characteristics in the Au/P3HT:PCBM:F4-TCNQ/n-Si (MPS) Schottky barrier diode
E. Yağlıoğlu, Ö. Tüzün Özmen. Chin. Phys. B, 2014, 23(11): 117306.
[3] Analysis of optoelectronic properties of TiO2 nanowiers/Si heterojunction arrays
Saeideh Ramezani Sani. Chin. Phys. B, 2014, 23(10): 107302.
[4] Comments on `Enhanced piezoresistivity in Ni-silicone rubber composites'
D. Bloor, A. Graham, P. J.Laughlin, D. Lussey. Chin. Phys. B, 2010, 19(1): 017001.
[5] The dynamics of triple-well trapped Bose--Einstein condensates with atoms feeding and loss effects
Mu Ai-Xia, Zhou Xiao-Yan, Xue Ju-Kui. Chin. Phys. B, 2008, 17(3): 764-770.
[6] The effect of doped ions on single-molecule magnets of the Mn12-Ac family
Cao Hui-Bo, Zhang Jun-Rong, He Lun-Hua, Wang Fang-Wei, Zhang Pan-Lin. Chin. Phys. B, 2008, 17(11): 4318-4322.
[7] Resonant tunnelling of the magnetization in molecular crystal of [(Mn1-xCrx)12O12(CH3COO)16(H2O)4]?2CH3COOH?4H2O (x=0,0.03,0
He Guang, He Lun-Hua, Zhang Jun-Rong, Cao Hui-Bo, Yan Li-Qin, Wang Fang-Wei, Yan Qi-Wei. Chin. Phys. B, 2007, 16(6): 1776-1779.
[8] Structure and magnetic properties of a new single-molecule magnet [Mn11Fe1O12 (CH3COO)16(H2O)4].2CH3COOH.4H2O
Cao Hui-Bo, He Lun-Hua, Wang Fang-Wei. Chin. Phys. B, 2005, 14(9): 1892-1895.
[9] Thermally-assisted tunnelling of magnetization in (Mn0.96Cr0.04)12-ac
He Lun-Hua, Cao Hui-Bo, Wang Fang-Wei. Chin. Phys. B, 2004, 13(11): 1962-1964.
[10] Bifurcation of a periodic instanton and quantum-classical transition in the biaxial nano-ferromagnet with a magnetic field along hard axis
Yan Qi-Wei, Li Zhi-Jian, Nie Yi-Hang, Liang Jiu-Qing. Chin. Phys. B, 2003, 12(8): 905-910.
No Suggested Reading articles found!