摘要
以平均粒径为4μm的α-Al2O3为起始原料、活性炭为成孔剂,通过干压成型法制备片状多孔Al2O3支撑体。研究了活性炭含量对多孔氧化铝支撑体结构和性能的影响。结果表明:活性炭在高温烧成过程中的氧化可显著提高支撑体的孔隙率,进而提高其渗透性能。当活性炭添加量为17%(质量分数)、烧成温度为1450℃时,支撑体的孔隙率、平均孔径、三点抗弯强度和纯水渗透通量分别达到45.8%,2.1μm,44.6MPa和88m3/(m2 h MPa)。经过80℃、10%NaOH溶液腐蚀20d后,支撑体的三点抗弯强度仍可以维持在23.4MPa,表明支撑体具有较好的耐碱腐蚀性能。
Disk porous alumina supports were fabricated by dry-pressing method using u-Al2O3 powder （with average particle size of 4 μm） as raw materials, together with activated carbon as pore-forming agent. Effect of activated carbon doping on structures and proper- ties of porous alumina support was investigated. The oxidation reaction of activated carbon during high temperature sintering process could greatly increase the porosity and, hence, resulted in high permeability of porous alumina support. The porosity, average pore size, three point bending strength and pure water flux of the alumina support with 17% （mass fraction） activated carbon dopant sintered at 1450 ℃ were 45.8%, 2.1 μm, 44.6 MPa and 88 ma/（m^2·h·MPa）, respectively. The three point bending strength of the support remained at 23.4 MPa even after immersed in 10% NaOH （80 ℃） for 20 d, indicating a comparatively good corrosion resistance to alkali solutions.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2012年第6期844-850,共7页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金青年基金(20906047)
材料化学工程国家重点实验室自主课题(ZK201002)
江苏省高校自然科学研究计划(11KJB530006)
江苏省“六大人才高峰”资助项目
关键词
陶瓷膜
支撑体
氧化铝
多孔陶瓷
活性炭
ceramic membrane
support
alumina
porous ceramics activated carbon
