Journal ArticleDOI
Magnetic and processability studies on rubber ferrite composites based on natural rubber and mixed ferrite
K. A. Malini,E. M. Mohammed,Swaminathan Sindhu,P. A. Joy,S. K. Date,S. D. Kulkarni,Philip Kurian,M. R. Anantharaman +7 more
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TLDR
In this paper, the magnetic properties of the rubber filler and the ferrite loaded rubber ferrite composites (RFCs) were evaluated and compared, and the validity of these equations were checked and correlated with the experimental data.Abstract:
Polycrystalline single phasic mixed ferrites belonging to the series Ni1−xZnxFe2O4 for various values of x have been prepared by conventional ceramic techniques. Pre-characterized nickel zinc ferrites were then incorporated into a natural rubber matrix according to a specific recipe for various loadings. The processability and cure parameters were then determined. The magnetic properties of the ceramic filler as well as the ferrite loaded rubber ferrite composites (RFC) were evaluated and compared. A general equation for predicting the magnetic properties was also formulated. The validity of these equations were then checked and correlated with the experimental data. The coercivity of the RFCs almost resemble that of the ceramic component in the RFC. Percolation threshold is not reached for a maximum loading of 120 phr (parts per hundred rubber by weight) of the filler. These studies indicate that flexible magnets can be made with appropriate magnetic properties namely saturation magnetisation (Ms) and magnetic field strength (Hc) by a judicious choice of x and a corresponding loading. These studies also suggest that there is no possible interaction between the filler and the matrix at least at the macroscopic level. The formulated equation will aid in synthesizing RFCs with predetermined magnetic properties.read more
Citations
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Journal ArticleDOI
High‐performance hexagonal boron nitride/bismaleimide composites with high thermal conductivity, low coefficient of thermal expansion, and low dielectric loss
Journal ArticleDOI
New composites with high thermal conductivity and low dielectric constant for microelectronic packaging
TL;DR: In this paper, three composites based on cyanate (CE) resin, aluminum nitride (AlN), surface-treated AlN [AlN(KH560]], and silicon dioxide (SiO2) for microelectronic packaging, coded as AlN/CE, AlN-SiO 2/CE composite, respectively, were developed for the first time.
Journal ArticleDOI
Modification of dielectric and mechanical properties of rubber ferrite composites containing manganese zinc ferrite
TL;DR: In this paper, a program based on G programming was developed with the aid of LabVIEW package to automate the dielectric measurements of mixed ferrites belonging to the series Mn(1−x)ZnxFe2O4 (MZF) were synthesized for different ‘x' values in steps of 0.2.
Journal ArticleDOI
Flexible microwave absorbers based on barium hexaferrite, carbon black, and nitrile rubber for 2–12 GHz applications
S. Vinayasree,S. Vinayasree,M. A. Soloman,Vijutha Sunny,Pezholil Mohanan,Philip Kurian,P. A. Joy,M. R. Anantharaman +7 more
TL;DR: In this article, a single layer electromagnetic wave absorber was designed by incorporating appropriate amounts of carbon black in a nitrile butadiene rubber matrix along with an optimized amount of magnetic counterpart, namely, barium hexaferrite for applications in S, C, and X-bands.
Journal ArticleDOI
Loading dependence similarities on the cure time and mechanical properties of rubber ferrite composites containing nickel zinc ferrite
TL;DR: In this article, the effect of loading on the cure characteristics and tensile properties of rubber ferrite composites were evaluated, and it was found that the loading dependence on cure time and mechanical properties exhibit an identical pattern.
References
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TL;DR: In this article, the authors present a chemical analysis of X-ray diffraction by Xray Spectrometry and phase-diagram Determination of single crystal structures and phase diagrams.
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