Forming of Aqueous SiC Suspension by Pressure Filtration
Forming of Aqueous SiC Suspension by Pressure Filtration
复制标题
通过压力过滤形成 SiC 水悬浮液
DOI：
10.2109/jcersj.114.259
复制
发表时间：
2006
影响因子：
1.1
通讯作者：
Y. Hirata
中科院分区：
文献类型：
--
作者：
Kota Kishigawa;Y. Hirata
使用开发的压力过滤装置连续记录在固结具有800或30 nm SiC颗粒的水性悬浮液期间施加的压力和悬浮高度。将5-30体积%固体的悬浮液通过三片0.1 μm孔径的膜过滤器过滤，该膜过滤器连接到以0.05-0.5 mm/min位移的活塞底部。脱水溶液流入Teflon圆筒中活塞的孔道。800 nm颗粒的最终堆积密度达到55- 62%，取决于颗粒的表面电荷。另一方面，30 nm SiC颗粒的最终堆积密度（41%密度）不受表面电荷的影响，并且低于800 nm SiC颗粒的最终堆积密度。对于800 nm和30 nm的SiC颗粒，1cm 3 SiC的固结能分别为1.1- 5.5J/cm 3和17.2J/cm 3。减小烧结体的孔径可以提高烧结能量。固结过程中两个颗粒之间施加的能量与悬浮液中两个颗粒之间的相互作用能的比值与固结SiC饼的堆积密度相关。
The applied pressure and suspension height during consolidation of an aqueous suspension with 800 or 30 nm SiC particles were continuously recorded using a developed pressure filtration apparatus. The suspension of 5-30 vol% solid was filtered through three sheets of a 0.1 μm pore diameter membrane filter attached to the bottom of the piston displaced at 0.05-0.5 mm/min. The dehydrated solution flowed into the pore channels in the piston in the Teflon cylinder. The final packing density of 800 nm particles reached 55-62%, depending on the surface charge of particles. On the other hand, the final packing density (41% density) of 30 nm SiC particles was not influenced by the surface charge, and was lower than that of 800 nm SiC particles. The consolidation energy for 1 cm 3 SiC was 1.1-5.5 J/cm 3 for 800 nm SiC particles and 17.2 J/cm 3 for 30 nm SiC particles. Decrease of the pore size of the consolidated SiC compact increased the consolidation energy. The ratio of energy applied between two particles during consolidation to the interaction energy between two particles in a suspension was correlated to the packing density of the consolidated SiC cake.