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We prepared porous Si3N4 ceramics with highly ordered and unidirectionally aligned channels by the self-organization method using an alginate template. The obtained samples show uniform pore distribution, high cell density, good mechanical strength and hierarchical pore structure. A great number of long fibrous β-Si3N4 grains protrude into channels, and other short length fibrous β-Si3N4 grains interlock...
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