Abstract
Gasproof thin-wall tubes of fine-grained ceramics based on zirconia and gadolinia have been produced by magnetic pulsed compaction and thermal sintering. Data on their structures and electric characteristics are presented. The tubes with a diameter of ~ 15 mm, wall thickness of ~ 0.7 mm, and length up to 80 mm are characterized by an uniform porous-free structure with a mean grain size in the range of 100 - 300 nm. The obtained ceramics possess high electrolytic properties.
Highlights
A number of modern technical applications requires fabrication of long-length ceramic tubes with improved properties
Thin-wall ceramic tubes are necessary to create solid oxide fuel cells (SOFC) of tube design. Such ceramics should be characterized with high oxygen-ion conductivity, gas impermeability, and mechanical strength
Magnetic pulsed compaction (MPC) has previously been used for product formation from micron-sized powders of metals and composites [3,4]
Summary
A number of modern technical applications requires fabrication of long-length ceramic tubes with improved properties. Thin-wall ceramic tubes are necessary to create solid oxide fuel cells (SOFC) of tube design. Such ceramics should be characterized with high oxygen-ion conductivity, gas impermeability, and mechanical strength. Magnetic pulsed compaction (MPC) followed by sintering is one of the perspective approaches for ceramic tube fabrication. It has certain advantages over the known alternative methods for manufacturing ceramic tubes such as slip casting, plasma sputtering, and hydrostatic compaction. In this article an experimental investigation of thin-wall tube fabrication from nanopowders based on zirconia and gadolinia using magnetic pulse compaction and thermal sintering is described.
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