Synthesis of Zinc Aluminum Oxide Spinel

ZnO-Al_2O_3 spinel and the spinel-containing ceramics have been synthesized by sintering, the mixture of zinc oxide and alumina fine powder in various molar rations under about 1600 ℃. The contact angles between copper melt and the sintered ceramic samples of different compositions have been measured at the temperatures of 1200 ℃ and 1300 ℃. It can be shown from the result that the addition of ZnO into Al_2O_3 improves the wettabriity of copper melt on Al_2O_3 ceramic.