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Technologies 2017, 5(3), 42; doi:10.3390/technologies5030042

Energy Efficiency in the Microwave-Assisted Solid-State Synthesis of Cobalt Aluminate Pigment

1
Department of Engineering “Enzo Ferrari”, University of Modena and Reggio Emilia, Via Vivarelli 10, 41125 Modena (I), Italy
2
Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, 43124 Parma (I), Italy
*
Author to whom correspondence should be addressed.
Received: 11 April 2017 / Revised: 30 June 2017 / Accepted: 3 July 2017 / Published: 4 July 2017
(This article belongs to the Special Issue Ceramic Technologies and Applications)
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Abstract

Abstract: Due to their rapid, selective, and volumetric heating, microwaves have been widely used in the past to enhance solid-state reactions as well as the synthesis of ceramic pigments. The aim of this work is to present a case study involving the preparation of blue CoAl2O4 pigment using different microwave applicators and generator frequencies, showing the advantages which can derive from a properly designed microwave reactor for the solid-state synthesis of such pigment. The results show that, when using a properly designed microwave applicator, the specific energy consumption can be significantly lowered compared to conventional heating techniques. Consistently with the data on the dielectric properties of precursors found in literature, the microwave processing of cobalt oxide and aluminum hydroxide mixtures resulted more favorable at 2.45 GHz than at 5.8 GHz microwave frequency. View Full-Text
Keywords: microwave heating; ceramic pigment; solid-state synthesis microwave heating; ceramic pigment; solid-state synthesis
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Veronesi, P.; Leonelli, C.; Bondioli, F. Energy Efficiency in the Microwave-Assisted Solid-State Synthesis of Cobalt Aluminate Pigment. Technologies 2017, 5, 42.

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