Investigation of oil palm ash microwave absorber for broadband application

Noordin, Ida Rahayu Mohamed; Idris, Hasnain Abdullah; Taib, Mohd Nasir; Sharif, Juliana Md; Rosli, Anis Diyana; Zanal, Asmalia; Abdullah, Ahmad Takiyuddin

doi:10.1109/cspa.2012.6194724

Cited by 10 publications

(4 citation statements)

References 10 publications

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“…Due to this, organic materials such as agricultural wastes have gained a lot of interest among researchers. Different types of microwave absorbers from varied agricultural wastes have been studied such as rice husk [5] , sugar cane baggase [6], corn stove [7], dried banana leave [8], oil palm ash [9] and many others. Most of the absorbers offer good absorption performances that surpass the threshold of -10dB reflection loss.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Wave Absorption Properties of Novel Green Composites Coconut Fiber Coir and Charcoal Powder over X-band Frequency for Electromagnetic Wave Absorbing Applications

Yah

Rahim

Lee

et al. 2018

AEM

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This paper presents the electromagnetic wave (EW) absorption properties in terms of complex permittivity and permeability of novel green composites coconut fiber coir and charcoal powder materials. The samples were fabricated using the raw agricultural waste coconut fiber coir, charcoal powder, epoxy resin and hardener with varied composition. The dielectric properties of the materials were characterized using two-port waveguide measurement method over the X-band frequency (8.2 -12.4GHz). The average permittivity value measured is approximately 3.00 with 10wt% charcoal has the highest permittivity of 3.59. Apart from that, all samples exhibit good reflection loss of better than -25dB which means more than 99% absorption rate. The result shows the composite material is a promising organic material for electromagnetic absorber applications.

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Section: Introductionmentioning

confidence: 99%

Electromagnetic Wave Absorption Properties of Novel Green Composites Coconut Fiber Coir and Charcoal Powder over X-band Frequency for Electromagnetic Wave Absorbing Applications

Yah

Rahim

Lee

et al. 2018

AEM

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“…Biocomposites have environmental advantages such as low density, high specific strength, enhanced energy recovery, CO 2 neutrality after burning, easy processing, bio-degradability and low cost [3][4]. Hence, many studies have been made to realize the prospective of using agricultural waste such as rice husk, kenaf, sugarcane bagasse and pineapple leaf fiber as an alternative material for electromagnetic absorber [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Investigate of wave absorption performance for oil palm frond and empty fruit bunch at 5.8 GHz

Baharudin

Ismail

Alhawari

et al. 2018

J. Fundam and Appl Sci.

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Low cost composites made from oil palm agricultural wastes showed much interest for absorber applications. In this work, dielectric properties of oil palm frond/PLA and empty fruit bunch/PLA which consists of 30%wt, S-parameter Reflection Method and the microwave absorbers were design using CST at 5.8GHz. The absorber thickness was varied to observe the reflection and transmission performance between 2 to 8 GHz. In addition, the Absorption Rate Figure

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“…With the development of high-tech surveillance and precision guidance technologies, the demand of stealth ability in weapons has reached a higher level [1][2][3], especially in air weaponry operated on high temperature [4][5][6][7][8][9][10][11][12]. Ceramic matrix composite is one of the most advantageous high-temperature stealth materials presently studied due to their desirable properties of high specific strength and specific modulus, as well as resistance to erosion and oxidation.…”

Section: Introductionmentioning

confidence: 99%

Preparation and dielectric properties of Si3N4/SiCw composite ceramic

Xiao

Luo

Zhou

et al. 2014

J Mater Sci: Mater Electron

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Gelcasting was employed to fabricate Si 3 N 4 /SiC whisker (SiCw) composite ceramics, and the effects of heattreatment temperature on the length-to-diameter ratio of the whiskers and SiCw content on microwave dielectric properties were studied. Compared with pure SiCw of spherical structure obtained at temperature of 1,750°C(Ar), pure SiCw treated at 1,600°C(Ar) showed rod-like structure, higher dielectric properties and more evenly distribution in Si 3 N 4 /SiCw composite ceramics. Both the real (e 0 ) and imaginary (e 00 ) permittivity of Si 3 N 4 /SiC whisker (SiCw) composite ceramics decreased with increasing frequency and increased as the whisker content raised owing to the interface and SiCw playing a role of dipole in the frequency range of 8. 2-12.4 GHz. In addition, comparing the ceramics with lower content of SiCw, the reflectivity of the composite ceramics moved to a lower frequency; the maximum absorption peak reached -22.4 dB at the whisker content of 15 wt%.

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Investigation of oil palm ash microwave absorber for broadband application

Cited by 10 publications

References 10 publications

Electromagnetic Wave Absorption Properties of Novel Green Composites Coconut Fiber Coir and Charcoal Powder over X-band Frequency for Electromagnetic Wave Absorbing Applications

Electromagnetic Wave Absorption Properties of Novel Green Composites Coconut Fiber Coir and Charcoal Powder over X-band Frequency for Electromagnetic Wave Absorbing Applications

Investigate of wave absorption performance for oil palm frond and empty fruit bunch at 5.8 GHz

Preparation and dielectric properties of Si3N4/SiCw composite ceramic

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