PRODUCTION OF TRANSLUCENT ALUMINA CERAMICS BY TAPE CASTING

Authors : Yasemin Tabak, Şeyda Polat, Ayşen Kiliç, Bayise Kavakli Vatansever

Pages : 3-17

Doi:10.56850/jnse.1140502

View : 116 | Download : 182

Publication Date : 2023-05-31

Article Type : Research Article

Abstract :Alumina powders are utilized in many industries like electronics, metallurgy optoelectronics, and fine ceramic composites. In this study, non-aqueous-based tape casting of alumina was carried out in a non-continuous single-blade tape casting machine. A slurry of alumina powder in a solvent was cast on a stationary surface with additives like dispersants, binders, and plasticizers. After the green tapes were dried, they were sintered to obtain the final desired shape. The hydraulic pressing method was used to increase the density of the alumina tapes. Layered alumina ceramics were produced at 5 different temperatures by pressureless sintering method (1450°C, 1500°C, 1550°C, 1600°C and 1650°C) for 5 h to observe the effect of sintering temperature. Results revealed the sintering conditions for obtaining translucent alumina, with the utilized slurry composition. Translucent alumina ceramics have gained importance as parts of semiconductor devices, substrates for electric parts, as heat/corrosion materials in reaction tubes and crucibles, and are used in medical equipment.
Keywords : Şerit Döküm, Alümina, Sinterleme, Tabakalı Seramikler, Mikroyapı.