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| 29. November 2001 |  | TEM Study of ZrO2 bicrystals, ZrO2 thin films and diamond nanoparticles |
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ReferentInnen:
| | Dr. V.V. Roddatis, Fritz-Haber-Institut of the Max-Planck-Society, Berlin |
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Ort:
| | EMPA, Dübendorf |
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Inhalt:
| | Zirconium dioxide (zirconia) is used in many different applications ranging from modern microelectronics based on high-temperature superconductors to catalysis as a support.
Transmission Electron Microscopy (TEM) was used to study bicrystals of cubic ZrO2 obtained by means of solid phase intergrowth processes. The structure of bicrystal layers and interfaces was characterized using electron diffraction, nanodiffraction, local microanalysis, high-resolution imaging and computer image simulation.
Based on a biomimetic approach a stepwise wet-chemical deposition technique was used to produce high quality thin films of sulfated zirconia. The structure of as-grown amorphous and annealed films was studied. It was found that electron irradiation causes crystallization of as-grown films and the influence of the observation conditions was investigated.
A new mechanism of diamond nanoparticles graphitization under the electron beam was discovered and studied by high-resolution electron microscopy and electron energy loss spectroscopy (EELS).
Leiterin EMPA Akademie
Dr. Anne Satir
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