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Appendix B. Site Reports—Europe 197<br />

Site:<br />

Darmstadt University of <strong>Technology</strong><br />

Department of Materials <strong>Science</strong><br />

Thin Films Division<br />

Petersenstrasse 23<br />

D-64287 Darmstadt, Germany<br />

Tel: (49) 6151-16 6306; Fax: (49) 6151-16 6335<br />

http://www.th-darmstadt.de/ms/fg/ds<br />

Date Visited: 14 October 1997<br />

WTEC:<br />

Hosts:<br />

J. Mendel (report author)<br />

Prof. Dr. Horst Hahn, Head, Thin Films Division, Materials<br />

<strong>Science</strong> Department<br />

Dr. Markus Winterer, principal contact<br />

BACKGROUND<br />

The Darmstadt University of <strong>Technology</strong> has recently focused on<br />

nanomaterials. Its new building for material science was completed in 1992<br />

<strong>and</strong> was officially dedicated in 1996. Here work includes particles, films,<br />

coatings, <strong>and</strong> bulk phase. Interest is in pores, grains, <strong>and</strong> clusters.<br />

Preparation methods can include gas vapor phase condensation, chemical<br />

vapor deposition, liquid plasma studies, chemical deposition, <strong>and</strong> sputtering.<br />

Electrical, mechanical, <strong>and</strong> spectral properties are all of interest.<br />

There are 22 scientists in Professor Dr. Hahn’s group. Interaction with<br />

industry <strong>and</strong> other technical centers occur frequently.<br />

RESEARCH AND DEVELOPMENT HIGHLIGHTS<br />

1. Preparation of SiC by chemical vapor synthesis (Sylkie Klein). This<br />

work emphasizes both high purity <strong>and</strong> high production rates.<br />

2. Synthesis of ZrO 2 /Al 2 O 3 by chemical vapor synthesis (Vladimir Srdic).<br />

Beginning with aluminum alkoxide, particles are formed in the 4-9 nm<br />

size range. Flow rate of helium influences properties.<br />

3. Impedance spectra on nano Y-stabilized zirconia (Pia Mondal). Powders<br />

are prepared by inert gas condensation. The lattice conductivity appears<br />

to be independent of grain size.

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