Preparation and characterization of sol–gel-derived unsupported Al2O3–SiO2 composite membranes

Evaluating the chemical stability of metal oxides in SO3 and applications of SiO2‐based membranes to O2/SO3 separation

“…Since 600°C-fired Al 2 O 3 powders retained a relative high surface area even after SO 3 exposure, SiO 2 -Al 2 O 3 composite membranes are viable candidates for O 2 /SO 3 separation in future work. [36][37][38] Figure 6 displays images of the water contact angles obtained with ZrO 2 and SiO 2 films coated onto silicon wafers. SiO 2 and ZrO 2 films had water contact angles of 30 and 22° after being fired under air at 600°C.…”

Effect of La, Ce, Y and B addition on thermal stability of unsupported alumina membranes

“…Inorganic ceramic membranes have attracted a great deal of attention in recent year due to their promising application in gas separation, liquid separation and catalytic membrane reactors at high temperature and in chemically reactive environment [1][2][3][4][5]. Alumina membranes have been widely used in liquid microfiltration or as support for catalyst.…”

Mesoporous activated alumina layers deposited on FeCrAl metallic substrates by an in situ hydrothermal method

“…The pore structure data of the materials sintered from 400 to 800 • C are listed in Table 1. Both the surface area and the pore volume decrease as the sintering temperature increases from 400 to 1000 • C. The loss of surface area and pore volume may be attributed to the higher sintering temperature of the samples because sintering is a process of densification driven by the tendency of reducing the internal energy [10,11]. The phase transformation of activated ␥-Al 2 O 3 to stable ␣-Al 2 O 3 is also responsible for the decrease of both the surface area and the pore volume.…”