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In order to preserve a spherical granule shape in a porous sintered body, presintering technology was developed to enhance the strength of Si-mixture granules containing Y 2 O 3 –Al 2 O 3 –CaO as sintering additives prior to shaping. The fracture strength of the granules measured by a compression test was ≤0.2MPa and ≤20MPa for as-spray dried granule and presintered...
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