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The Characterization of Porous Sintered Reaction‐Bonded Silicon Nitride Ceramics Fabricated by Si‐Additive Mixture Granules

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Porous sintered reaction‐bonded silicon nitride ceramics with dual‐sized pore channels were fabricated using granules consisting of a Si‐additive. A pressureless tapping method was used to maintain the spherical morphology of the weak spray‐dried granules. Emphasis was placed on the formation of wide pore channels (Φ≥10 μm). In addition to the successful formation of wide pore channels between the granules, narrow channels formed inside the granules. The size of the wide channels (Φ=5–20 μm) depended on the granule. On the other hand, the narrow channel size (Φ<1 μm) remained the same regardless of the granule size.
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Document Type: Research Article

Affiliations: Engineering Ceramics Research Group, Korea Institute of Materials Science, 797 Changwondaero, Changwon, Gyeongnam, 641-831, Republic of Korea

Publication date: 01 November 2011

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