Concept

Dioxyde de zirconium

Publications associées (97)

Low temperature crystalline titanium dioxide by atomic layer deposition for dye-sensitized solar cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Pascal Comte, Aswani Yella, Morgan Mertens Stefik, Aravind Kumar Chandiran, Leo-Philipp Heiniger

Low temperature processing of dye-sensitized solar cells (DSC) is crucial to enable commercialization with low-cost, plastic substrates. Prior studies have focused on mechanical compression of premade particles on plastic or glass substrates, however, this ...

Amer Chemical Soc2013

IR electrochromics from block copolymer-architectured doped metal oxide nanocrystals

Raffaella Buonsanti

We describe recent efforts in using doped metal oxide nanocrystals in electrochromic windows to manage solar heat gain in buildings. These nanocrystals show switchable absorption properties in the IR due to their dynamically tunable surface plasmon resonan ...

2013

Micro-tubular Solid Oxide Fuel Cells with Nickelate Cathode-support

Henning Lübbe

The shortage of natural resources, rising energy demands and global warming have created an urgent need for more efficient energy conversion devices and different energy resources to achieve a more sustainable and efficient economy. Solid Oxide Fuel Cells ...

EPFL2012

Two strain-hardening mechanisms in nanocrystalline austenitic steel: An in situ synchrotron X-ray diffraction study

Helena Van Swygenhoven, Steven Van Petegem, Patrick Schloth, Michael Andreas Weisser

The mechanical behaviour of nanocrystalline austenitic steels with and without yttria particles was investigated using in situ synchrotron diffraction during tensile deformation. Two different strain-hardening regimes were found. The first regime can be as ...

2012

Effect of Uniaxial Compressive Stress on Dielectric and Piezoelectric Responses in Lead Zirconate Titanate Based Ceramics

Dragan Damjanovic

A uniaxial compressive stress significantly modifies the dielectric and piezoelectric response of Pb(Zr,Ti)O3 (PZT)-based piezoceramics. In soft PZT, the pre-stress decreases both the piezoelectric coefficient and its increment with increasing dynamical st ...

2012

Three-dimensional microstructural changes in the Ni-YSZ solid oxide fuel cell anode during operation

Jan Van Herle, Aïcha Hessler-Wyser, Antonin Faes

Microstructural evolution in solid oxide fuel cell (SOFC) cermet anodes has been investigated using X-ray nanotomography along with differential absorption imaging. SOFC anode supports composed of Ni and yttria-stabilized zirconia (YSZ) were subjected to e ...

2012

Microcracking of high zirconia refractories after t→m phase transition during cooling: An EBSD study

Cyril Cayron

High zirconia refractories are composed of a zirconia skeleton surrounded by an intergranular glassy phase. In these materials, zirconia undergoes up to two successive phase transitions during the manufacturing process, c → t then t → m. This leads, after ...

2011

Analysis of Solid Oxide Fuel Cell LSM-YSZ Composite Cathodes With Varying Starting Powder Sizes

Christos Comninellis, Jan Van Herle, Pietro Tanasini

Solid oxide fuel cell cathodes have been examined using non-destructive x-ray nanotomography. The cathodes examined were a composite of strontium-doped lanthanum manganite (LSM) and yttria-stabilized zirconia (YSZ), with three different starting powder siz ...

2011

Design of experiment approach applied to reducing and oxidizing tolerance of anode supported solid oxide fuel cell. Part II: Electrical, electrochemical and microstructural characterization of tape-cast cells

Jan Van Herle, Aïcha Hessler-Wyser, Marco Cantoni, Stefan Diethelm, Antonin Faes, Zacharie Wuillemin, Pietro Tanasini, Henning Lübbe, Nicola Accardo

One of the major limitations of the nickel (Ni) - yttria-stabilized zirconia (YSZ) anode support for solid oxide fuel cells (SOFC) is its low capability to withstand transients between reducing and oxidizing atmospheres ("RedOx" cycle), owing to the Ni-to- ...

Elsevier2011

Electrochemical promotion of CO combustion over non-percolated Pt particles supported on YSZ using a novel bipolar configuration

Christos Comninellis, Wolfgang Harbich, György Foti, Michael Hugentobler, Chun Xia

The electrochemical promotion of CO combustion over nano-dispersed Platinum particles supported on yttria stabilized zirconia (YSZ) is investigated at 300 degrees C under high vacuum conditions. By polarizing the nanoparticles, we were able to enhance the ...

Elsevier2011

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