Electrophoretic deposition of YSZ thin-film electrolyte for SOFCs utilizing electrostatic-steric stabilized suspensions obtained via high energy ball milling

This manuscript describes a facile alternative route to make thin-film yttria-stabilized zirconia (YSZ) electrolyte by liquid-phase assisted electrophoretic deposition utilizing electrostatic-steric stabilized YSZ suspension followed by sintering. Very fine YSZ particles in ball-milled suspension facilitate their sustained dispersion through electrostatic mechanism as evidenced by their higher zeta potentials. Binder addition into the ball-milled suspension is also demonstrated to contribute complementary steric hindrance effects on suspension stability. As the consequence, the film quality and sinterability improve in the sequence of film made from non ball-milled suspension, film made from ball-milled suspension and film made from ball-milled suspension with binder addition. The specific deposition mechanisms pertaining to each suspension are also postulated and discussed below. A very thin dense electrolyte layer of ∼10 μm can be achieved via electrophoretic deposition route utilizing ball-milled suspension and binder addition. This in turn, makes the electrolyte resistance a more negligible part of the overall cell resistance. Further on, we also tested the performance of SOFC utilizing as-formed 10 μm YSZ electrolyte i.e. YSZ-NiO|YSZ|LSM (La0.8Sr0.2MnO3-δ), whereby a maximum power density of ∼850 mW cm−2 at 850 °C was demonstrated.

Ball bouncing in gym SFX

Ball Bouncing in Gym SFX.

Ball Point Pen Clicks SFX

Clicking a pen.

Ball point pen writing two signatures SFX

Ball Point Pen Writing Two Signatures SFX.

Morphology of ball milled graphite

The Scanning Electron Microscope (SEM) is used to characterize the morphology of ball milled graphite samples, which can be helpful for the further understanding of the samples' spectroscopic and absorptive properties.

Enraged Aborigines at the Embassy Ball : media representations of indigenous Australia

Analyses current media representations of Indigenous Australia, including the Aboriginal Tent Embassy "riot", the  high profile columnist Andrew Bolt's breaching of the Anti-Discrimination Act, and the Liam Jurrah case, while historicising the way Aboriginal Australians have been portrayed in the media and relating this to ethics.