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Phase modification and dielectric properties of a cullet-paper ash-kaolin clay-based ceramic

Abu Samah, Khamisah and Sahar, Md. Rahim and Yusop, M. and Omar, Mohamad Faiz (2018) Phase modification and dielectric properties of a cullet-paper ash-kaolin clay-based ceramic. International Journal of Minerals, Metallurgy and Materials, 25 (3). pp. 350-356. ISSN 1674-4799

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Official URL: http://dx.doi.org/10.1007/s12613-018-1578-7


Novel ceramics from waste material made of (x) paper ash–(80 − x) cullet–20 kaolin clay (10wt% ≤ x ≤ 30wt%) were successfully synthesized using a conventional solid-state reaction technique. Energy-dispersive X-ray analysis confirmed the presence of Si, Ca, Al, and Fe in the waste material for preparing these ceramics. The influence of the cullet content on the phase structures and the dielectric properties of these ceramics were systematically investigated. The impedance spectra were verified in the range from 1 Hz to 10 MHz at room temperature. The phase of the ceramics was found to primarily consist of wollastonite (CaSiO3), along with minor phases of γ-dicalcium silicate (Ca2SiO4) and quartz (SiO2). The sample with a cullet content of 55wt% possessed the optimum wollastonite structure and exhibited good dielectric properties. An increase of the cullet content beyond 55wt% resulted in a structural change from wollastonite to dicalcium silicate, a decrease in dielectric constant, and an increase in dielectric loss. All experimental results suggested that these novel ceramics from waste are applicable for electronic devices.

Item Type:Article
Uncontrolled Keywords:ceramics, cullet glass
Subjects:Q Science > QC Physics
ID Code:86001
Deposited By: Widya Wahid
Deposited On:30 Aug 2020 08:49
Last Modified:30 Aug 2020 08:49

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