Study of physical and dielectric properties of biowaste-derived synthetic wollastonite

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dc.contributor.author Sk S. Hossain
dc.contributor.author P. K. Roy
dc.date.accessioned 2019-09-19T05:14:09Z
dc.date.available 2019-09-19T05:14:09Z
dc.date.issued 2018-09-03
dc.identifier.issn 21870764
dc.identifier.uri http://localhost:8080/xmlui/handle/123456789/384
dc.description.abstract The aim of this study is to fabricate synthetic wollastonite from chicken eggshells (CES) and rice husk ash (RHA) through an economical solid-state route. Wollastonite was formulated with a stoichiometric amount of calcined eggshells (~99% CaO) and heat-treated RHA (~93% SiO2) as ingredients and calcined at 1000, 1100, 1150 and 1200°C for 120 min. The XRD spectrum revealed single-phase para-wollastonite (monoclinic, P21/a) after annealing at 1100° C and 1200°C with calcined powder contents comprising mainly a phase of pseudo-wollastonite (anorthic, C-1). For dielectric measurement, only the para- and pseudo-wollastonite pressed powder was sintered at 1100 and 1200°C for 240 min. The obtained results showed a stable, low dielectric constant (ε׳ (of about 4.5 to 6, losses (tanδ) of about 0.0026 to 0.00361 and resistivity of around 6–9 × 108 (Ώ-cm) at 100 kHz. These are highly promising characteristics which suggest that waste-derived synthetic wollastonite may be useable as an ingredient in electrical porcelain applications. en_US
dc.language.iso en en_US
dc.publisher Taylor and Francis Ltd. en_US
dc.subject Wollastonite; waste materials; eggshells; rice husk ash; dielectric properties en_US
dc.title Study of physical and dielectric properties of biowaste-derived synthetic wollastonite en_US
dc.type Article en_US


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