Fabrication of Porous Silicon Nitride by Sacrificing Template Method

Abstract:

High performance porous structural ceramics have been widely studied. Silicon nitride is an interesting material for this application because bodies with high mechanical strength, achieved as a result of “in situ” anisotropic grain grown, can be obtained. In this study, Si3N4 bodies with different porosity related aspects (percentage, morphology, etc.) are made using the sacrificing template method, by changing the percentage (vol%) and the drying method of the mixture as well as the sintering time. The porosity, apparent density (Archimedes method), microstructure (SEM) and the mechanical strength (in compression) of these bodies were determined. It was thus possible to relate the type and amount of starch with the porosity and mechanical properties of the bodies.

• Periodical: Advances in Science and Technology (Volume 63)
• Pages: 170-174
• DOI: https://doi.org/10.4028/www.scientific.net/AST.63.170
• Online since: October 2010
• Authors: Rodrigo Mende Mesquita, Ana Helena Almeida Bressiani
• Keywords: Porous Ceramics, Sacrificial Template, Silicon Nitride, Starch

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