Study on Use of Nanosized Alpha Alumina from Schedule Waste as Formulation in Thermal Insulation Paint

Schedule waste used in this study is white aluminium dross produce from an aluminium smelting plant. It has a gibbsite crystal form, and was calcined at high temperature and transformed into α-alumina. nanosized powder with 76 nm primary particle size was produced by top-down method via high velocity wet milling. Comparative thermal insulation study was then performed in paints made from 15 wt% of these nanosize and micron-size alumina. The results from this study shows that the nanosize α-alumina is the best insulator, with a temperature reduction of 57 and 41% less, compared to micron-size α-alumina respectively for ceramic and steel plate.