OPOMNIK: IJS KOLOKVIJ, sreda, 13. oktober 2010, Prof. Jürgen Rödel

[Andreja Berglez]

Vabim vas na 4. predavanje iz sklopa "Kolokviji na IJS" v letu 2010/11, ki
bo  v sredo, 13. oktobra 2010, ob 13:00 uri v Veliki predavalnici Instituta
>Jožef Stefan< na Jamovi cesti 39 v Ljubljani. Napovednik predavanja najdete
tudi na naslovu http://www.ijs.si/ijsw/Koledar_prireditev, posnetke
preteklih predavanj pa na http://videolectures.net/kolokviji_ijs. 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Prof. Jürgen Rödel

Institute of Materials Science, Technische Universität Darmstadt, Nemčija

 

Uporaba in raziskave piezokeramike

 

Obseg svetovnega trga piezokeramike je približno 10 milijard dolarjev letno,
predvsem na področju aktuatorjev, senzorjev, pretvornikov in
transformatorjev. Zakonodaja Evropske unije je sprožila raziskave po celem
svetu, usmerjene v iskanje piezoelektričnih materialov brez strupenega
svinca, ki naj bi nadomestili komercialno najbolj razširjeno piezokeramiko
na osnovi svinčevega cirkonat-titanata (PZT). V predavanju bo predstavljen
način iskanja popolnoma novih materialov, ki vzbujajo vrsto premislekov, kot
so njihova  strupenost, primerna kristalna struktura ali ionska
polarizabilnost, in zahtevajo vrsto raziskav, kot na primer in situ
raziskave strukture v odvisnosti od električnega polja.

Predavanje bo v angleščini.

Lepo vabljeni!

***

We would like to invite you to 4th lecture of the "Kolokvij na IJS" in the
school year 2010/11. The lecture will be held on Wednesday, October 13,
2010, at 1 pm at the JSI main lecture hall, Jamova 39, Ljubljana. The
abstract of the lecture can be found on website:
<http://www.ijs.si/ijsw/Koledar_prireditev>
http://www.ijs.si/ijsw/Koledar_prireditev, the previous recorded lectures
can be found on website:  <http://videolectures.net/kolokviji_ijs>
http://videolectures.net/kolokviji_ijs. 

********************************************

 

Prof. Jürgen Rödel

Institute of Materials Science, Technische Universität Darmstadt, Germany

 

Application and Research in Piezoceramics

 

The world's market on piezoceramics is about 10 billion dollar per year.
Main applications are actuators, e.g. for fuel injection and for
piezomotors, sensors e.g. for parking pilot and airbag, transducers for
ultrasound investigations and transformers for example for mobile phones. 

Legislation in the European Union has taken the lead to push for the
elimination of lead in piezoceramics, which would eliminate the main
material, lead-zirconate-titanate (PZT) and has lead to a world-wide effort
for the quest of lead-free piezoceramics. A pathway on how to conduct a
search for a completely new material based on an only approximate
understanding of the current material is presented. It entails simple
procedures like searching for appropriate elements based on toxicity, price,
formation of appropriate crystal structures and ionic polarizability. Then
it discusses some of the materials under investigation and the salient
scientific questions. In particular, examples from in-situ investigations,
respectively field-dependent transmission electron microscopy,
field-dependent synchrotron investigations and others are highlighted. The
required electrical properties are also discussed.

 

 

We look forward to meeting you at the "Kolokvij na IJS"!

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