Open AccessDevelopment and Characterization of Alumina-Based Membranes for Water Purification
Author(s) -
Bilal Anjum Ahmed,
Farhana Ahmed,
Khurshid Ali,
Jamshaid Shabbir
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/842/1/012007
Subject(s) - sintering , materials science , porosity , compaction , ball mill , scanning electron microscope , pellets , ceramic , membrane , permeability (electromagnetism) , analytical chemistry (journal) , composite material , chromatography , chemistry , biochemistry
High energy ball milling (HEBM) and pressure less sintering technique were performed to achieve a homogenous powder mixture and porous ceramic membranes of a-Al 2 O 3 /2%MWCNTs. A uniaxial powder compaction press was used to compress the powder mixture into circular green pellets (27 mm in diameter, 3-4 mm thickness) at three different pressure values of 100 MPa, 250 MPa and 400 MPa, followed by sintering at three different temperature values of 1200 °C, 1250 °C and 1300 °C under argon gas atmosphere. The effect of process parameters on the pore distribution and phase change was characterized by employing Field Emission Scanning Electron Microscopy (FESEM) and X-Ray Diffraction (XRD) respectively. Process parameters were found to have a strong influence on the characteristics of the developed membranes like diametrical strength, water permeability and porosity. Water flow rates varied from 950 l/m 2 .hr to 42 l/m 2 hr, porosity decreased from 48.57% to 28.87% and diametrical strength increased from 0.95 MPa to 11.06 MPa as compaction pressure was increased from 100 MPa to 400 MPa and sintering temperature was increased from 1200 °C to 1300 °C.