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In this study, we investigate mullite containing ceramics prepared from alumina (α-Al2O3) and silica xerogel converted from sago waste ash. The silica xerogel was ground and then mixed with a varying content of α-Al2O3. The measurements were performed on cylindrical samples sintered at temperatures ranging from 900°C to 1700°C. In order to understand the mullitization process and structure formation...
The sub-millimeter (300 GHz) wave sintering of the alumina ceramics had been performed. Temperature dependences of the grain size and its distribution were obtained. Temperature dependence of standard deviation (STD) of the grain size distribution is different from conventional heated one (thermal equilibrium process).
The effect of forming methods on properties of alumina ceramics sintered by using a high power submillimeter waves gyrotron material processing system have been investigated. Two different packing methods, un-cold isostatic pressing (un-CIP) and cold isostatic pressing (CIP) were applied for green samples. The density evaluation shows that the densification of CIP samples is much higher than un-CIP...
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