|About this Abstract
||Materials Science & Technology 2017
||Processing and Performance of Materials Using Microwaves, Electric and Magnetic Fields, Ultrasound, Lasers, and Mechanical Work – Rustum Roy Symposium
||Observations on the Effect of Electric Field on Mullite Formation in Porcelains
||Wirat Lerdprom, Eugenio Zapata-Solvas, Doni Daniel Jayaseelan, William E. Lee
|On-Site Speaker (Planned)
In conventional sintering process, mullite formation in porcelains has been extensively studied as a function of heating rate, dwell time and temperature. It is evident that primary mullite forms by the decomposition of clay substances whilst secondary mullite forms from viscous aluminosilicate glass. However, under Field Enhanced Sintering (FES) conditions mullite formation in porcelains is different. On flash sintering mullite forms via dendritic growth and screw dislocation mechanisms depending on the degree of supersaturation while in microwave sintering mullite forms via a Vapor-Liquid-Solid (VLS) mechanism. Thus the energy sources have a strong effect on mullite formation in porcelains. In the present study, the detail of mullite formation in flash and microwave sintering compared to conventional sintering will be discussed using XRD, SEM, and TEM data.