Journal ArticleDOI
Electrical Properties of Nanocomposites
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TLDR
In this article, the state-of-the-art for synthesizing composites of nanometer-sized phases (metal, semiconductor or ceramic) dispersed in a matrix has been reviewed.Abstract:
The present state-of-the-art for synthesizing composites of nanometer-sized phases (metal, semiconductor or ceramic) dispersed in a matrix has been reviewed. Both dc and ac electrical properties of different nanocomposites synthesized have been described. The theoretical models used to explain the experimental results are discussed. It appears that there is a need to have newer theoretical models developed to understand the ac electrical properties of metal-ceramic nanocomposites.read more
Citations
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Estimation of the physical properties of nanocomposites by finite-element discretization and Monte Carlo simulation
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Preparation of alumina–silica–nickel nanocomposite by in situ reduction through sol–gel route
TL;DR: In this paper, the presence of nickel particles of size ∼20nm in the nano-pores of an alumina-silica nanocomposite has been detected using X-ray diffraction and transmission electron micrograph.
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Preparation of silica-molybdenum carbide nanocomposite by in situ reduction
TL;DR: In this paper, the average particle size of molybdenum carbide is in the range of 5-15 nm and the detailed XRD analyses coupled with thermodynamic arguments show that reduction of ammonium moly bdate is predominantly by in situ generated hydrogen.
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Frequency dependent magnetoconductivity and conductivity study in Ni-dispersed silica nano-composite produced by sol-gel technique
A. Sarkar,Parimal Ghosh,Sukalyan Chattopadhyay,Ajit Kumar Meikap,A. Bhattacharyay,S.K. Chatterjee,G. C. Das,S. Mukherjee,Manoj K. Mitra +8 more
TL;DR: The low frequency (20 Hz to 1 MHz) ac conductivity and magnetoconductivity behavior of ceramic nanocomposite (Ni-SiO2) at low temperature down to 77 K are reported in this article.
References
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Journal ArticleDOI
Effect of dopant-molecule size on the electrical conductivity of polyacetylene
TL;DR: In this paper, the authors measured the temperature dependence of the conductivity of cis-polyacetylene doped with iodine and showed that the effect of the size and shape of the dopant molecule is the controlling variable rather than the doping conditions.
Journal ArticleDOI
Microstructural studies of glass-metal composites produced by ion-exchange and hydrogen treatments
TL;DR: In this article, a detailed electron micrographic study was carried out on float glass surface subjected to copper ion exchange in molten salts followed by a reduction treatment in hydrogen, and the optical absorption spectra of the glass-metal composites showed two bands, namely at 17 400 cm−1 and 23 000 cm− 1 respectively.
Journal ArticleDOI
Resistive inhomogeneity in discontinuous metal films
TL;DR: In this article, a series of experiments were conducted to investigate resistive inhomogeneity in discontinuous metal films and it was shown that the metal-insulator transition is a percolation threshold phenomenon with large areas of films remaining poorly connected to the metallic network.
Journal ArticleDOI
Formation and decomposition of Fe3B/Nd2Fe14B nanocomposite structure in Fe–Nd–B–Cr melt-spun ribbons under isothermal annealing
TL;DR: In this paper, the formation of Nd2Fe14B induced by Cr was studied by means of x-ray diffractometry and Mossbauer spectroscopy with particular attention paid to the formation.
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