| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a substrate tube for the formation of an inorganic separation film including alumina and zeolite by adding an additive to an inexpensive alumina raw material powder, and to provide an alumina substrate tube for the formation of an inorganic separation film obtained from the method. <P>SOLUTION: The alumina base body tube for a separation film comprises: (a) 83-94 wt.% of Al<SB>2</SB>O<SB>3</SB>; (b) 5-14 wt.% of SiO<SB>2</SB>; and (c) 1-4 wt.% of the oxides of an alkali metal and/or an alkaline earth metal, wherein (d) the weight ratio of SiO<SB>2</SB>/(the oxides of an alkali metal and/or an alkaline earth metal) is 1-6, (e) the porosity is 20-50%, (f) the average pore diameter measured by the mercury penetration method is 0.5-3 μm, and (g) the mode diameter of the pore distribution by the bubble point method is 0.15-0.5 μm. <P>COPYRIGHT: (C)2007,JPO&INPIT |
