A protective polyester fabric with magnetic properties using mixture of carbonyl iron and nano carbon black along with aluminium sputtering

In the present work, polyester fabric with protective and magnetic properties is introduced using mixture of micro magnetic carbonyl iron powder and nano carbon black through pad-dry-cure method and sputter coating with aluminium (Al). This leads to X-band microwave absorbing properties as the great demand for protective garment. The morphology, static magnetic and X-band microwave absorbing properties of the treated fabrics were characterized by field emission scanning electron microscopy, vibrating sample magnetometer and vector network analyzer in the range of 8.2–12.4 GHz. Normal-angle X-ray diffraction was used to study the crystalline structure of treated PET fabric. Compared with the blank polyethylene terephthalate fabric without Al sputter coating, the presence of nano carbon black and carbonyl iron powder on the polyethylene terephthalate fabric sputter coated with aluminum exhibited higher microwave absorbing properties particularly in the primary range of 8.2–12.4 GHz. The results in the whole frequency range investigated were remarkable; however, the reflection loss was found to be lower than −5.9 dB in the entire frequency. The maximum reflection loss value was reached to −7.7 dB at the frequency of 8.2 GHz. Overall, the co-application of nano carbon black and carbonyl iron powders on the polyethylene terephthalate fabric opens up a new coating method for X-band microwave absorbing properties.

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Microwave absorbing properties of ternary linear low-density polyethylene/carbonyl iron powder/carbon black composites

Journal of Applied Polymer Science ◽

10.1002/app.30666 ◽

2009 ◽

Vol 114 (6) ◽

pp. 3434-3439 ◽

Cited By ~ 7

Author(s):

Xiang-Zhong Shen ◽

Shan-Mei Xie ◽

Jun Guo ◽

Zhi-Cheng Liu

Keyword(s):

Carbon Black ◽

Iron Powder ◽

Carbonyl Iron ◽

Low Density Polyethylene ◽

Low Density ◽

Linear Low Density Polyethylene ◽

Microwave Absorbing Properties ◽

Carbonyl Iron Powder ◽

Microwave Absorbing

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Structural, Magnetic, and X-Band Microwave Absorbing Properties of Ni-Ferrites Prepared Using Oxidized Mill Scales

Jurnal Elektronika dan Telekomunikasi ◽

10.14203/jet.v21.27-34 ◽

2021 ◽

Vol 21 (1) ◽

pp. 27

Author(s):

Ardita Septiani ◽

Novrita Idayanti ◽

Tony Kristiantoro ◽

Dedi Mada ◽

Nadya Larasati Kartika ◽

...

Keyword(s):

Magnetic Properties ◽

Single Phase ◽

Raw Materials ◽

Energy Dispersive Spectrometer ◽

Milling Process ◽

Microwave Properties ◽

Heating Process ◽

Microwave Absorbing Properties ◽

X Band ◽

Microwave Absorbing

This study aims to evaluate the structural, magnetic, and microwave absorbing properties at the X-band region of oxidized mill scales as by-product derived from a steel making process by means of a facile solid-state reaction. The oxidized mill scales were heated at 600 °C for 4 h followed by mixing with NiO. A calcination process took place at 900 °C and sintering process were conducted at 1260 °C with a milling process conducted in between the heating process. X-ray diffraction (XRD) and scanning electron microscope (SEM) equipped with energy dispersive spectrometer (EDS) were employed to evaluate the structural properties of the Ni-ferrites samples. Remacomp measurement were conducted to evaluate the magnetic properties and vector network analyzer (VNA) to measure its microwave properties. A single phase of NiFe2O4 was confirmed by XRD data. The site occupancies derived from the Rietveld refinement shows that the Ni:Fe:O ratio deviates from the 1:2:4 ratio as that suggests vacancies formed in the Ni2+ and Fe3+ that lowers the unit cell density to 5.08 g/cm3 that further confirmed by EDS measurement. The coercivity of 11 kOe is also higher than the bulk NiFe2O4¬ prepared by the chemical grade raw materials. The reflection data of the microwave properties at X-band of 8-12 GHz do not shows significant absorptions. This study suggests that the selected preparation method yields a single phase, however with the significant crystallographic defects and has less ‘soft’ magnetic properties compared to NiFe2O4 prepared using chemical grade by previous study.

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