论文标题
颗粒大小的作用在非sintered（绿色）陶瓷的凝聚力上
Role of particles size on the cohesive strength of non-sintered (green) ceramics
论文作者
论文摘要
颗粒加载的泡沫的制备，然后干燥，烧结和/或交联的泡沫是广泛探索的路线，用于开发具有高机械强度的轻质陶瓷。由于其复杂的生产和所获得的“绿色”材料的机械强度，因此对非插入的干陶瓷泡沫的研究较少。在这里，我们从含有半径的球形二氧化硅颗粒的泡沫颗粒悬浮液中产生轻巧的陶瓷，不同于4.5 nm至7μm。在存在阳离子表面活性剂的情况下制备湿泡沫，并在环境条件下干燥，以获取质量密度在100至700 kg/m3之间的多孔材料。包含较小颗粒的材料表现出更高的强度（最多2000次），接近烧结材料的材料。一种新的理论表达来预测这种材料的机械强度，并用于解释最终干燥材料中颗粒之间的范德华景点所产生的材料的测量强度。
Preparation of particle-loaded foams, followed by drying, sintering and/or cross-linking are widely explored routes for developing lightweight ceramics with high mechanical strength. The non-sintered dry ceramic foams are less studied due to their intricate production and the assumed poor mechanical strength of the obtained "green" materials. Here we produce lightweight ceramics from foamed particle suspensions containing spherical silica particles with radii varied between 4.5 nm and 7 μm. The wet foams were prepared in the presence of cationic surfactant and were dried at ambient conditions to obtain porous materials with mass densities between 100 and 700 kg/m3. The materials containing smaller particles exhibited much higher strength (up to 2000 times), approaching that of the sintered materials. A new theoretical expression for predicting the mechanical strength of such materials was derived and was used to explain the measured strengths of the produced materials through the van der Waals attractions between the particles in the final dry materials.
