| Preparation and Characterization of Reaction Sintered
Zirconia-Mullite Composites |
K. DAs (NEE RoY), B. MuKHERJEE AND G. BANERJEE
Pages : 135-138
DOI : 10.1080/0371750X.1993.10804589 |
| Abstract |
| Zirconia dispersed mullite composites have been prepared from
zircon flour and calcined alumina by reaction sintering. The raw
materials have been characterized by chemical analyses, particle
size distribution and X-ray diffraction. The hatched raw materials
have been attritor milled, uniaxially pressed and fired between
1450° and 1650°C with 2 hrs soaking time.
The effects of MgO and Y20 3 additives on bulk density, porosity,
rate of shrinkage and thermal expansion have been studied.
Results indicate that the rate of shrinkage is higher in composites
with additives and this shrinkage commences at a lower
temperature as compared to that without additive. The thermal
expansion and shrinkage behaviour are discussed. |
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