Design and synthesis strategy of high-performance black alumina membrane support by adding manganese dioxide

s In order to reduce the cost and increase the efficiency of ceramic membrane supports, a novel porous black alumina membrane support was prepared using alumina and manganese dioxide as raw materials. The effects of manganese dioxide content and sintering temperature on the flexural strength, porosity, and water flux of the membrane supports were investigated. Meanwhile, the membrane support was characterized by SEM, XRD, and TG-DSC. The results show that the favorable performance of the obtained membrane support is achieved at a manganese dioxide content of 50 wt.% and a sintering temperature of 1,150 °C, due to the formation of manganese–aluminum spinel. The water flux of the membrane support is as high as 8,852.25 L m−2 h−1·bar−1, the flexural strength reaches 38.72 MPa, and it also has desirable acid and alkali corrosion resistance. The present experimental results provide an important experimental basis for obtaining high-performance ceramic membranes.