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Agricultural wastes as a resource of raw materials for developing low-dielectric glass-ceramics.

Danewalia SS, Sharma G, Thakur S, Singh K - Sci Rep (2016)

Bottom Line: Sugarcane leaves ash exhibits higher content of alkali metal oxides than rice husk ash, which reduces the melting point of the components due to eutectic reactions.The presence of less ordered augite phase enhances the dielectric permittivity as compared to cristobalite and tridymite phases.The glass-ceramics developed with adequately devitrified phases can be used in microelectronic devices and other dielectric applications.

View Article: PubMed Central - PubMed

Affiliation: School of Physics and Materials Science, Thapar University, Patiala-147004, India.

ABSTRACT
Agricultural waste ashes are used as resource materials to synthesize new glass and glass-ceramics. The as-prepared materials are characterized using various techniques for their structural and dielectric properties to check their suitability in microelectronic applications. Sugarcane leaves ash exhibits higher content of alkali metal oxides than rice husk ash, which reduces the melting point of the components due to eutectic reactions. The addition of sugarcane leaves ash in rice husk ash promotes the glass formation. Additionally, it prevents the cristobalite phase formation. These materials are inherently porous, which is responsible for low dielectric permittivity i.e. 9 to 40. The presence of less ordered augite phase enhances the dielectric permittivity as compared to cristobalite and tridymite phases. The present glass-ceramics exhibit lower losses than similar materials synthesized using conventional minerals. The dielectric permittivity is independent to a wide range of temperature and frequency. The glass-ceramics developed with adequately devitrified phases can be used in microelectronic devices and other dielectric applications.

No MeSH data available.


Related in: MedlinePlus

Variation in dielectric permittivity with temperature for the glass-ceramics at (a) 1 kHz (b) 1 MHz.
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f7: Variation in dielectric permittivity with temperature for the glass-ceramics at (a) 1 kHz (b) 1 MHz.

Mentions: Interestingly, ϵ′ of R-75 is less than that of R-100, despite of its higher alkali content. It can be explained on the basis of the porosity of these glass-ceramics. SEM images of the fractured surfaces of the pellets of these glass-ceramics indicate more porosity in R-75 than R-100 sample (Fig. 6). Air is trapped in these pores and leads to decrease the dielectric permittivity43. The variation in dielectric permittivity with temperature at selected frequencies is shown in Fig. 7. The temperature independent behaviour of dielectric permittivity of these glass-ceramics at high frequencies (1 MHz) is clearly observed as shown in Fig. 7(b).


Agricultural wastes as a resource of raw materials for developing low-dielectric glass-ceramics.

Danewalia SS, Sharma G, Thakur S, Singh K - Sci Rep (2016)

Variation in dielectric permittivity with temperature for the glass-ceramics at (a) 1 kHz (b) 1 MHz.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4834533&req=5

f7: Variation in dielectric permittivity with temperature for the glass-ceramics at (a) 1 kHz (b) 1 MHz.
Mentions: Interestingly, ϵ′ of R-75 is less than that of R-100, despite of its higher alkali content. It can be explained on the basis of the porosity of these glass-ceramics. SEM images of the fractured surfaces of the pellets of these glass-ceramics indicate more porosity in R-75 than R-100 sample (Fig. 6). Air is trapped in these pores and leads to decrease the dielectric permittivity43. The variation in dielectric permittivity with temperature at selected frequencies is shown in Fig. 7. The temperature independent behaviour of dielectric permittivity of these glass-ceramics at high frequencies (1 MHz) is clearly observed as shown in Fig. 7(b).

Bottom Line: Sugarcane leaves ash exhibits higher content of alkali metal oxides than rice husk ash, which reduces the melting point of the components due to eutectic reactions.The presence of less ordered augite phase enhances the dielectric permittivity as compared to cristobalite and tridymite phases.The glass-ceramics developed with adequately devitrified phases can be used in microelectronic devices and other dielectric applications.

View Article: PubMed Central - PubMed

Affiliation: School of Physics and Materials Science, Thapar University, Patiala-147004, India.

ABSTRACT
Agricultural waste ashes are used as resource materials to synthesize new glass and glass-ceramics. The as-prepared materials are characterized using various techniques for their structural and dielectric properties to check their suitability in microelectronic applications. Sugarcane leaves ash exhibits higher content of alkali metal oxides than rice husk ash, which reduces the melting point of the components due to eutectic reactions. The addition of sugarcane leaves ash in rice husk ash promotes the glass formation. Additionally, it prevents the cristobalite phase formation. These materials are inherently porous, which is responsible for low dielectric permittivity i.e. 9 to 40. The presence of less ordered augite phase enhances the dielectric permittivity as compared to cristobalite and tridymite phases. The present glass-ceramics exhibit lower losses than similar materials synthesized using conventional minerals. The dielectric permittivity is independent to a wide range of temperature and frequency. The glass-ceramics developed with adequately devitrified phases can be used in microelectronic devices and other dielectric applications.

No MeSH data available.


Related in: MedlinePlus