基体对陶瓷复合膜的影响

Effects of substrates on ceramic composite membrane

以AlCl3·6H2O代替异丙醇铝作为原料,合成了AlOOH溶胶,再在多孔α Al2O3基体上,通过浸提法制备了α Al2O3陶瓷复合膜,研究了基体质量对膜和成膜过程的影响。研究发现,基体的质量不但对膜的制备工艺过程有很大的影响,还对最终膜孔的结构及热处理烧结机理过程有重要影响。考察了γ Al2O3薄膜的孔径和分离渗透性能随温度变化的规律,以便利用γ Al2O3的相变烧结过程原理,控制复合层陶瓷膜的孔径大小和分布。

Alumina membrane was prepared by depositing AlOOH sol derived from AlCl_3·6H_2O on the porous substrates with dipping-coating technology. The research mainly focused on the effects of substrates on the ceramic composite membrane and the processing. The results show that the porous ceramic substrates have great effects not only on processing procedure, but also on the pore structure and sintering mechanism. To control the pore size and its distribution of ceramic composite membrane, the change of the pore size and permeate of membrane was also taken into experiments due to phase transition and sintering under higher temperature.