粉体の表面活性化が可能にする無焼成セラミックスと複合材料の実現

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  • Non-Firing Ceramics and Composites via Surface Activation of Powder
  • フンタイ ノ ヒョウメン カッセイカ ガ カノウ ニ スル ムショウセイ セラミックス ト フクゴウ ザイリョウ ノ ジツゲン

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<p>Sintering of most ceramic and composite materials are only possible at temperatures over 1000°C due to their high melting point. Sintering is acknowledged as an expensive process, which takes several hours to several days. In addition, high temperature sintering affects the final product by causing undesired grain coarsening or changing the initial chemical stoichiometry. Our research group has proposed a “non-firing sintering”, where no firing process is required for achieving high densities. The underlying idea of this method involves the chemical activation of powder surface via ball milling, where the surface of particles is rubbed against balls. In this review, we will introduce the mechanism of the method as well as some process know-how, with some examples of preparing solidified bodies of silicon carbide, composite of carbon nanotube (CNT) and silica, and organic/inorganic composite materials.</p>

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