Evaluation of graphite and TiO2 as susceptors for microwave dewaxing in ceramic shell casting processes of artworks
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Pérez Campos, Rafael; Pérez Conesa, Itahisa; Fayos Fernández, José; Pérez Campos, Rafael; Monzó Cabrera, JuanGrupo de investigación
Grupo de Electromagnetismo y materiaÁrea de conocimiento
Teoría de la Señal y las ComunicacionesPatrocinadores
This work is funded by the State Program for the Promotion of Scientific and Technical Research of Excellence around two projects in this line "Alternatives to dewaxing in the smelting of ceramic husks (ceramic shell casting): microwave technique", HAR2010-17570 (01/01/2011 - 30/04/2014) and "Alternatives to dewaxing in ceramic husks (ceramic shell casting): Microwave technique (II)", reference. HAR2016-77203-P (30/12/2016 - 29/12/2019).Fecha de publicación
2022Editorial
International Microwave Power InstituteCita bibliográfica
PÉREZ-CONESA, I., et al. Evaluation of graphite and TiO2 as susceptors for microwave dewaxing in ceramic shell casting processes of artworks. Journal of Microwave Power and Electromagnetic Energy, 2022, vol. 56, no 3, p. 201-215.Palabras clave
MicrowaveDewaxing
Artistic Casting
Ceramic shells
Susceptors
Thermal shock
Resumen
The main problems of the traditional foundry dewaxing processes in fine arts workshops are the emission of gases, the loss of 80% of the wax, the high electrical consumption, and the high risks for the operators. The introduction of the microwave technology for dewaxing of ceramic shell molds allows to minimize some of these problems, although the use of electromagnetic susceptors that capture the radiated energy and transform it into heat is required. This article describes different microwave dewaxing tests using TiO2 and graphite as susceptors. The results obtained show that this technique is viable, allowing the casting process to be carried out with a low percentage of breakage problems in the mold and significantly reducing the emitted gases and electricity consumption. The technique allows to recover in the same operation around 90% of the wax used in small and medium format objects. The tests show that the selection of the material used as a susceptor, the area of application and ...
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