Characterization of Gradual Porous Ceramic Structures Obtained by Powder Sedimentation

作     者：Ioan Vida-Simiti Nicolaie Jumate Valentin Moldovan Gyorgy Thalmaier Niculina Sechel 

作者机构：Materials Science and Engineering Department Technical University of Cluj-Napoca 103-105 Muncii Avenue 400641 Cluj-Napoca Romania 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2012年第28卷第4期

页      面：362-366页

核心收录：

学科分类：07[理学] 0806[工学-冶金工程] 0817[工学-化学工程与技术] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by CNCSIS–UEFISCSU(Project No. PNII – IDEI 749/2009) 

主　　题：Powder sedimentation Ceramic membrane Porous material Porosity gradient 

摘      要：Asymmetric membranes present better separation and service characteristics than the symmetric ones. In our preliminary studies the possibility of obtaining sintered porous materials with gradual structure by sedimentation of metallic and ceramic powders was demonstrated. Zirconium silicate （ZrSiO4） particles were used for the manufacturing of the porous supports, and mullite powder was deposited by sedimentation in order to achieve the active layer with pores size gradient. The used powders and the obtained structures were characterized by laser scattering particle size analyzer, scanning electron microscopy and mercury porosimetry. The permeability and the filtration fineness of the structures were also determined. By using a thin active layer made of small particles deposited onto a macro-porous support, one can achieve membranes with high flow rates and filtration fineness in the microfiltration area.