Cold isostatic pressing as a method for fabricating high-strength ceramic materials based on ZrO2

Room Direct Methanol Solid Oxide Fuel Cell

“…Protonic (or hydroxonium) ceramic electrolytes, in particular beta alumina, are known possessing very low room conductivity [4]. The aim of this work was to develop and study room solid oxide DFMC based on recently published concepts [5].…”

“…Thin dense ceramic membranes from Na-β"-Al 2 O 3 with sintered density 3.2 g/cm 3 and room sodium conductivity 0.004 S/cm [5] were used as initial material. In order to restore the degraded surface layer, which is the cause of apparent low protonic conductivity [5], membranes were at first saturated with sodium under ionic current in a solution, and then subjected to the partial ionic exchange Na + Ag + with simultaneous deposition of non-blocking silver electrodes. After such treatment the electrolytes had room sodium conductivity up to 0.033 S/cm and room hydrogen conductivity (in aqueous acetic acid) about 0.0005 S/cm.…”

Room Ionic Conduction in Beta Alumina Cell with Nanocomposite Electrodes

“…The aim of the present work was a similar study for the low-temperature cells with a cationic conductivity based on ceramic beta alumina electrolytes. Details of ceramic process for manufacturing planar ceramic Na-β"-Al 2 O 3 membranes were published elsewhere [3]. As-sintered membranes had density 3.2 g/cm 3 and perfect water-tightness.…”