Material Characterization and Microwave Substrate Applications of Alumina‐Filled Butyl Rubber Composites

Chameswary, J.; Namitha, L.K.; Brahmakumar, M.; Sebastian, Mailadil Thomas

doi:10.1111/ijac.12067

Cited by 12 publications

(2 citation statements)

References 29 publications

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“…The requirements for a material to be used as a flexible dielectric waveguide are mechanical flexibility, high relative permittivity, low dielectric loss, high thermal conductivity, low coefficient of thermal expansion (CTE), etc. Recently low-loss ceramic-filled butyl rubber and silicon rubberbased composites have been reported, [134][135][136] but further work is needed for device optimisation.…”

Section: Materials For Future Applications and Conclusionmentioning

confidence: 99%

Low-loss dielectric ceramic materials and their properties

Sebastian

Ubic

Jantunen

2015

International Materials Reviews

611

242

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In addition to the constant demand of low-loss dielectric materials for wireless telecommunication, the recent progress in the Internet of Things (IoT), the Tactile Internet (fifth generation wireless systems), the Industrial Internet, satellite broadcasting and intelligent transport systems (ITS) has put more pressure on their development with modern component fabrication techniques. Oxide ceramics are critical for these applications, and a full understanding of their crystal chemistry is fundamental for future development. Properties of microwave ceramics depend on several parameters including their composition, the purity of starting materials, processing conditions and their ultimate densification/porosity. In this review the data for all reported low-loss microwave dielectric ceramic materials are collected and tabulated. The table of these materials gives the relative permittivity, quality factor, temperature variation of the resonant frequency, crystal structure, sintering temperature, measurement frequency and references. In addition, the methods commonly employed for measuring the microwave dielectric properties, important from the applications point of view, factors affecting the dielectric loss, methods to tailor the dielectric properties and materials for future applications, are briefly described. The data will be very useful for scientists, industrialists, engineers and students working on current and emerging applications of wireless communications.

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Section: Materials For Future Applications and Conclusionmentioning

confidence: 99%

Low-loss dielectric ceramic materials and their properties

Sebastian

Ubic

Jantunen

2015

International Materials Reviews

611

242

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“…Many authors [9][10][11][12] have extensively studied the reinforcement of butyl rubber with different fillers, and their effects on the various properties of the polymer composites. The electrical and thermal properties of IIR/NBR were enhanced by the addition of carbon black N-326 and N-774.…”

Section: Introductionmentioning

confidence: 99%

Effect of black sand nanoparticles on physical-mechanical properties of butyl rubber compounds

Mogy

Lawandy

2022

Journal of Thermoplastic Composite Materials

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A novel type of silica namely black sand (BS) with silane coupling agent was chosen as reinforcing filler in butyl rubber (IIR). BS was obtained from the beach area of Rosetta in Egypt. The filler was characterized by Fourier-transform infrared (FTIR), X-ray diffraction (XRD), and transmission electron microscope (TEM). The XRD analysis showed that BS is composed mainly of Albite (Sodium Aluminium Silicate) up to 64% approximately. Novel nanocomposites were prepared via a two-roll mill by incorporating different concentrations of BS nanoparticles (5,10, 15, 20,30 and 40 phr) in IIR. The effects of filler loading on shape factor, curing characteristics, and mechanical and dynamic properties of IIR vulcanizates were investigated. The modulus of IIR vulcanizates was used to predict the shape factor of BS aggregation in the polymer. The data indicated that cure time decreased with the increase in filler loading, and the change in scorch time is less. It was found that the shape factor is independent of the concentration. With an increase in the filler loading, tensile and elongation of the composites were significantly increased, especially at 30 phr. The bound rubber content increased with increasing BS content up to 30 phr exhibiting the rubber-filler interaction. The reinforcing factor, R (related to the difference in tan δ peak height at the glass transition temperature (Tg) for the filled and unfilled rubbers), also demonstrated that the BS-IIR interaction was stronger than for unfilled rubber. Since 30 phr black sand loaded IIR composite showed superior physical-mechanical properties. In general, the results indicated that the black sand filler was an effective reinforcement material for the butyl rubber.

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Rubber–Ceramic Composites

Sebastian

Namitha

2017

Microwave Materials and Applications 2V Set

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Material Characterization and Microwave Substrate Applications of Alumina‐Filled Butyl Rubber Composites

Cited by 12 publications

References 29 publications

Low-loss dielectric ceramic materials and their properties

Low-loss dielectric ceramic materials and their properties

Effect of black sand nanoparticles on physical-mechanical properties of butyl rubber compounds

Rubber–Ceramic Composites

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