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Manufacturing of Tubular Dead‐End Membranes by Continuous Thermoplastic Extrusion
Author(s) -
Salehi Mehdi,
Pfaff Ewald M.,
Kaletsch Anke,
Graule Thomas,
Clemens Frank,
Grobéty Bernard
Publication year - 2013
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12190
Subject(s) - materials science , extrusion , thermogravimetric analysis , paraffin wax , thermoplastic , membrane , stearic acid , wax , composite material , raw material , sintering , lubricant , chemical engineering , organic chemistry , chemistry , biology , engineering , genetics
Dense and gastight dead‐end tubular Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3‐δ ( BSCF ) membranes were fabricated by thermoplastic extrusion. Optimal feedstocks for the extrusion of dead‐end tubular structures were obtained for a feedstock consisting of 89.83 wt% BSCF powder, 5.63 wt% ethylene vinyl acetate ( EVA ), 3.56 wt% paraffin wax ( PW ), and 0.98 wt% stearic acid ( SA ). Thermogravimetric analysis ( TGA ) was used to determine the thermal characteristics of the feedstock and to characterize the amount of binder removed during the wicking step. Straight and round dead‐end tubular membranes with wall thickness of 0.5 mm could be achieved after sintering. The gastightness test showed that the membranes were leak‐tight up to a pressure of 35 bar.