凝胶浇注制备La_(0.8)Sr_(0.2)Cr_(0.5)Fe_(0.5)O_(3-δ)-Zr_(0.84)Y_(0.16)O_(1.92)非对称陶瓷透氧膜

Preparation of La_(0.8)Sr_(0.2)Cr_(0.5)Fe_(0.5)O_(3-δ)-Zr_(0.84)Y_(0.16)O_(1.92) Asymmetric Ceramic Oxygen-Permeable Membrane by Gelcasting

要凝胶浇注制备多孔支撑体,并采用浆料涂膜和高温共烧技术制备非对称La_(0.8)Sr_(0.2)Cr_(0.5)Fe_(0.5)O_(3-δ)-Zr_(0.84)Y_(0.16)O_(1.92)(LSCF-YSZ)双相复合陶瓷透氧膜。结果显示,采用凝胶浇注制备技术,可获得结构均匀和高孔隙率的多孔支撑体;在多孔支撑体上,采用浆料涂膜和高温共烧技术制备的LSCF-YSZ非对称管状透氧膜,Air/He梯度下,950℃,氧渗透速率达到1.17×10^(-8)mol·cm^(-2)·s^(-1);在850—950℃温度范围,膜的氧渗透表观活化能为163.7±0.4kJ/mol。

support was prepared by gelcasting,and La0.8Sr0.2Cr0.5Fe0.5O3-δ-Zr0.84Y0.16O1.92 asymmetric two-phase complex ceramic oxygen-permeable membrane was prepared by slurry coating and high temperature co-fired technique. The results showed that homogeneous structure and high porosity of porous support was obtained by gelcasting technique. The LSCF-YSZ asymmetric tubular oxygen-permeable membrane on porous support was by slurry coating and high temperature co-fired technique,the oxygen permeation rate was 1.17× 10^-8mol· cm^-2 · s^-1 under gradient of Air/He at 950℃. The apparent active energy for oxygen permeation is 163.7 ± 0. 4kJ/mol in the temperature range of 850--950℃.