FABRICATION TECHNIQUE OF FINE AND HIGHLY POROUS CERAMICS COMPACTS

A fabrication technique for fine, highly porous compacts composed of u ltrafine ceramics was proposed. Mixtures of ultrafine ceramics (alumin a, silica, titania, magnesia) as-received or their aggregates treated using various solvents and a large quantity (maximum value 300 mass%) of alpha-olefin oligomers (AGO) were compressed at a pressure of 19.6 MPa and then fired at 600-1350 degrees C. The porosity of the fired co mpacts could be controlled in the range of 69-88%. The distribution of pore diameter in the compacts varied in the range of 0.04-0.44 mu m w ith depending on the raw material and the pretreatment or firing tempe ratures.