Abstract
Abstract The potential for preparing a ZrO2-containing ceramic composite based on barium feldspar (BaAl2Si2O8) using the reaction sintering of zircon has been investigated. It is demonstrated that, through the reaction of ZrSiO4, Al2O3 and BaCO3 above 1400 °C, a distribution of ZrO2 particles in a BaO · Al2O3 · 2SiO2 matrix can be achieved. A glassy phase rich in Si and Ba surrounds the zirconia particles and infiltrates the grain boundaries of the polycrystalline feldspar matrix. The tendency of the ZrO2 particles to agglomerate within the matrix can be reduced by incorporating additional silica into the reaction, white limited stabilisation of tetragonal ZrO2 can be achieved by additions of Y2O3 which partition between the ZrO2 and the glassy boundary phase.
Published Version
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