Cathodic Electrophoretic Deposition of Ceramic Nano-Particle Manganese Zinc Ferrite

Author(s):  
Cody Washburn ◽  
Jacob Jorne ◽  
Santosh Kurinec
2006 ◽  
Vol 314 ◽  
pp. 127-132 ◽  
Author(s):  
Cody Washburn ◽  
Jacob Jorne ◽  
Santosh Kurinec

The electrophoretic deposition (EPD) of micro/nano-particle manganese zinc ferrite (Mnx Zn1-xFe2O4) material has been carried out on silicon substrates. EPD is performed in isopropanol (IPA) solutions containing charging and adhesion agents. The ferrite powders were prepared by grinding ceramic sintered toroids of a commercial high permeability Mn-Zn ferrite. The ferrite film has been deposited up to 4μm in thickness in 30 minutes showing good selectivity to silicon patterned with 250nm thermally grown silicon dioxide. Additionally, selective deposition has been observed on heavily doped p-type regions in n-type silicon substrates. The deposition process is a self limiting process with the initial high elerophoretic current declining to 10% of its value in 10 minutes. This result suggests that majority of ferrite deposition occurs in first 10 minutes. The deposition rate and zeta potential measurements indicate a high particle velocity on the order 5.7x10-3 cm/s with an electric field of 160V/cm generated across the 2 cm electrode spacing. An amorphous like interfacial layer is observed in as deposited substrates. The scanning electron micrographs indicate pattern filling and conformal deposition on copper planar micro-inductors fabricated by chemical mechanical planarization. These results are promising for powder ferrite material (hard and soft) to be selectively deposited for a wide variety of applications in microelectronics passive components and in MEM’s based applications


Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 616
Author(s):  
Ján Kruželák ◽  
Andrea Kvasničáková ◽  
Klaudia Hložeková ◽  
Rastislav Dosoudil ◽  
Marek Gořalík ◽  
...  

In the present work, composite materials were prepared by incorporation of manganese-zinc ferrite, carbon black and combination of ferrite and carbon black into acrylonitrile-butadiene rubber (NBR). For cross-linking of composites, standard sulfur-based curing system was applied. The main goal was to investigate the influence of the fillers on the physical-mechanical properties of composites. Then, the electromagnetic absorption shielding ability was investigated in the frequency range 1 MHz–3 GHz. The results revealed that composites filled with ferrite provide sufficient absorption shielding performance in the tested frequency range. On the other hand, ferrite behaves as an inactive filler and deteriorates the physical-mechanical characteristics of composites. Carbon black reinforces the rubber matrix and contributes to the improvement of physical-mechanical properties. However, composites filled with carbon black are not able to absorb electromagnetic radiation in the given frequency range. Finally, the combination of carbon black and ferrite resulted in the modification of both physical-mechanical characteristics and absorption shielding ability of hybrid composites.


2016 ◽  
Vol 13 (11) ◽  
pp. 20160377-20160377 ◽  
Author(s):  
Ashiqur Rahman ◽  
Ng M. Yi ◽  
Afaz U. Ahmed ◽  
Touhidul Alam ◽  
Mandeep J. Singh ◽  
...  

1976 ◽  
Vol 11 (7) ◽  
pp. 1335-1338 ◽  
Author(s):  
G. C. Jain ◽  
B. K. Das ◽  
R. S. Khanduja ◽  
S. C. Gupta

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