化工学报2012，Vol.63Issue(2)：626-633,8.DOI:10.3969/j.issn.0438-1157.2012.02.041
粒径对K2Ti6O13大孔陶瓷的制备及性能影响
Effect of particle size of whiskers on preparation and properties of macroporous K2Ti6O13 ceramics
摘要
Abstract
The K2Ti6O13 macroporous ceramics were prepared by the dry pressing method with raw materials of K2Ti6O13 whiskers, K2CO3 and TiO2 powers, and the pore structure was controlled by changing the length of K2Ti6O13 whiskers and using accumulation of whiskers with different sizes. The relationship among particle size, ratios of whiskers with different particle sizes and properties of permeability and bending strength of porous K2Ti6O13 ceramics were investigated. The results showed that the bulk density and bending strength of K2Ti6O13 porous ceramics increased with the decrease of particle size of KzTi6O13 whiskers, while the behavior of porosity and permeability was the opposite. When K2Ti6O13 porous ceramics were prepared by using accumulation of K2Ti6O13 whiskers with different sizes whose length was D50 = 7. 50 μm and 1. 60 /μm, the corresponding mass ratio was 3 : 1, the framework ofK2Ti6Oi3 ceramics were connected with the long whiskers and the medium or small particles. The K2Ti6O13 ceramics exhibited optimal properties as follows: bending strength of 42. 8±0. 2 Mpa, pure water flux of 2366 L · M-2 · H-1 · Mpa-1 and open porosity of 36.4%, respectively. The performance of K2Ti6O13 porous ceramics prepared from whiskers with different sizes was better than that of ceramics with uniform whiskers in terms of permeability and bending strength. This material showed excellent potential in the area of molecular sieve membrane.关键词
K2Ti6O13晶须/大孔陶瓷/粒径/分子筛膜Key words
K2Ti6Oi3whisker/ macroporous ceramics/ particle size/ molecular sieve membrane分类
化学化工引用本文复制引用
杨祝红,黄大华,陈闪山,仇龙云,蒙萌,陆小华,冯新..粒径对K2Ti6O13大孔陶瓷的制备及性能影响[J].化工学报,2012,63(2):626-633,8.基金项目
国家自然科学基金重点项目(20736002) （20736002）
国家自然科学基金委员会与香港研究资助局联合科研基金(20731160614) （20731160614）
国家自然科学基金(20976080) （20976080）
国家高技术研究发展计划项目(2006AA03Z455) （2006AA03Z455）
江苏省高技术研究项目(BG2007051) （BG2007051）
江苏省产学研联合创新资金(BY2009107). （BY2009107）
