摘要
在传统有机泡沫浸渍工艺的基础上,考虑浸渍浆体的颗粒级配,以Stovall公式为基础,建立了颗粒级配理论模型,得到了颗粒级配系数(δ)与多孔预制体堆秘密度间关系式,推导出理论上最佳的颗粒级配系数为4。实验选取不同D_(50)(中位粒径)和不同δ组份二氧化硅粉末制备了多孔陶瓷样品.对样品的物理、化学性能进行研究并将实验结果与通过理论模型推导出的结果进行验证对比。结果表明:采用颗粒级配系数为4左右时制备的多孔陶瓷孔隙结构、骨架表面颗粒结合性能达到最佳,与通过模型推导得到的最佳颗粒级配系数4具有很好的吻合性。
Based on the traditional polymeric sponge replication process of making porous ceramics, and considering the particle grading of the slurry powder,a novel theoretical model based on the Stovall formula was built.The relationship between particle size distribution（δ） and stacking density of powder for the prefabricated porous ceramic was derived from the model,and the largest stacking density obtained as the particle grading parameterδis 4.The porous ceramics with different median particle diameters（D_（50）） andδwere prepared and their physical and chemical properties were determined.The test results were compared with that of the theoretical model.The results show that the pore structure,particle bonding and physical and chemical properties are optimum for the porous ceramic with the particle grading 4,which are in good agreement to the theoretical result.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2011年第5期550-556,共7页
Chinese Journal of Materials Research
关键词
材料合成与加工工艺
多孔陶瓷
有机浸渍
颗粒级配
synthesizing and processing technics for materials
porous ceramic
polymeric sponge
particle size distribution
