采用中位粒径(D50)分别为(20±2)μm、(15±2)μm、(10±2)μm的α-Al2O3粉体为原料,通过调整其粒径分布,考察了粒径分布参数δ的变化对片状支撑体孔结构的影响.研究表明,在本研究的三种中位粒径(D50)下,当δ＜4.0时,随δ值的增大,支撑体的孔隙率由40%下降到30%左右;当δ＞4.0以后,支撑体的孔隙率基本稳定在28%.对于采用中位粒径分别为(20±2)μm和(15±2)μm的原料制备的支撑体,当δ＜3.0时,随δ值的增大,支撑体的平均孔径分别从3.5μm减小到1.1μm,从2.0μm减小到1.3μm;而对D50为(10±2)μm的原料制备的支撑体,δ在1.5～8.0范围内变化时,支撑体的平均孔径基本稳定在0.8μm.采用中位粒径D50为(20±2)μm、(15±2)μm、(10±2)μm的三种原料制备的支撑体,随δ值的增大,其孔径分布变窄,最可几分布峰高变高,分布向小孔径方向移动.
参考文献
| [1] | Larbot A.Fundamentals of inorganic membrane science and technology[M].Adsterda(i)n:Elesevier Science BV,1996:119-139. |
| [2] | Biesheuvel P. Maarten;Verweij Henk .Design of ceramic membrane supports: Permeability, tensile strength and stress[J].Journal of Membrane Science,1999(1):141-152. |
| [3] | 徐南平.面向应用过程的陶瓷膜材料设计、制备与应用[M].北京:科学出版社,2005:1-9. |
| [4] | Flsieh H P.Inorganic melrlbrane for separation and reaction[M].Adsterdam:Elesevier Science BV,1996:39-44. |
| [5] | 王焕庭;刘杏芹;周勇 等.多孔陶瓷支撑体膜材料的制备和表征[J].膜科学与技术,1997,17(01):47-52. |
| [6] | 李小斌,徐晓辉,周秋生.氧化铝多孔陶瓷膜支撑体制备的工艺过程和微观机制的综合评述[J].矿冶工程,2003(06):62-64. |
| [7] | 朱新文,江东亮,谭寿洪.多孔陶瓷的制备、性能及应用：（Ⅰ）多孔陶瓷的制造工艺[J].陶瓷学报,2003(01):40-45. |
| [8] | Das N;Maiti H S .Effect of size distribution of the starting powder on the pore size and its distribution of tape cast alumina microporous membranes[J].Journal of the European Ceramic Society,1998,19:341-345. |
| [9] | Allen T.Particle size,shape and distribution[A].New York,London:Chapman &hall,1981:103-164. |
| [10] | Zheng J M;Johnson P F;Reed J S .Improved equation of the continuous particle size distribution for dense packing[J].Journal of the American Ceramic Society,1990,73(05):1392-1398. |
| [11] | 黄培,邢卫红,徐南平,时钧.气体泡压法测定无机微滤膜孔径分布研究[J].水处理技术,1996(02):80. |
| [12] | Lee D Y;Kim D J;Kim B Y et al.Effect of alumina particle size and distribution on infiltration rate and fracture toughness of alumina-glass compoisites prepared by melt infiltration[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2003,341(1-2):98-105. |
| [13] | Patterson B R;Benson L A .Effect of powder size distribution on sintering[J].Progr Powder Metal,1984,39:215-230. |
| [14] | German R M .Sintering densification for powder mixtures of varying distribution widths[J].Acta Metallurgica Et Materialia,1992,40(09):2085-2089. |
| [15] | Shiau FS.;Leu TH.;Fang TT. .Effects of milling and particle size distribution on the sintering behavior and the evolution of the microstructure in sintering powder compacts[J].Materials Chemistry and Physics,1998(1):33-40. |
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