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<p class=MsoNormal>Vabim vas na 4. predavanje iz sklopa "Kolokviji na
IJS" v letu 2010/11, ki bo <strong><span style='font-family:"Calibri","sans-serif";
color:red'> v sredo, 13. oktobra 2010, ob 13:00 uri </span></strong><b><span
style='color:red'>v Veliki predavalnici</span></b><span style='color:red'>
Instituta »Jožef Stefan«</span> na Jamovi cesti 39 v Ljubljani.
Napovednik predavanja najdete tudi na naslovu <a
href="http://www.ijs.si/ijsw/Koledar_prireditev">http://www.ijs.si/ijsw/Koledar_prireditev</a>,
posnetke preteklih predavanj<span style='color:blue'> </span>pa na <a
href="http://videolectures.net/kolokviji_ijs">http://videolectures.net/kolokviji_ijs</a>.
<o:p></o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<b><o:p></o:p></b></p>
<p class=MsoNormal><b>Prof. Jürgen Rödel<o:p></o:p></b></p>
<p class=MsoNormal><i>Institute of Materials Science, Technische Universität
Darmstadt, Nemčija</i><b><o:p></o:p></b></p>
<p class=MsoNormal><i><o:p> </o:p></i></p>
<p class=MsoNormal style='text-align:justify'><b><span style='font-size:14.0pt'>Uporaba
in raziskave piezokeramike</span></b><span style='font-family:"Arial","sans-serif"'><o:p></o:p></span></p>
<p class=MsoNormal style='text-align:justify'><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-align:justify'>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 <i>in situ</i> raziskave strukture v
odvisnosti od električnega polja.<i><span style='font-size:12.0pt;font-family:
"Times New Roman","serif"'><o:p></o:p></span></i></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;
text-align:justify'>Predavanje bo v angleščini.<o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><strong><span
style='font-family:"Calibri","sans-serif";color:red'>Lepo vabljeni!<o:p></o:p></span></strong></p>
<p class=MsoNormal align=center style='mso-margin-top-alt:auto;margin-bottom:
12.0pt;text-align:center'><strong><span style='font-size:22.0pt;font-family:
"Calibri","sans-serif"'>***</span></strong><strong><span style='font-size:22.0pt;
font-family:"Calibri","sans-serif";font-weight:normal'><o:p></o:p></span></strong></p>
<p class=MsoNormal style='text-align:justify'><span lang=EN-US>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 <b>on Wednesday, October 13, 2010, at 1 pm</b>
at the <b>JSI main lecture hall</b>, Jamova 39, Ljubljana. The abstract of the
lecture can be found on website: </span><span lang=EN-US style='font-size:10.0pt'><a
href="http://www.ijs.si/ijsw/Koledar_prireditev"><span style='font-size:11.0pt'>http://www.ijs.si/ijsw/Koledar_prireditev</span></a></span><span
lang=EN-US>, the previous recorded lectures can be found on website: </span><span
lang=EN-US style='font-size:10.0pt'><a
href="http://videolectures.net/kolokviji_ijs"><span style='font-size:11.0pt'>http://videolectures.net/kolokviji_ijs</span></a></span><span
lang=EN-US>.</span><span lang=EN-US style='font-size:10.0pt'> </span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US>********************************************</span><b><o:p></o:p></b></p>
<p class=MsoNormal><b><o:p> </o:p></b></p>
<p class=MsoNormal><b>Prof. Jürgen Rödel<o:p></o:p></b></p>
<p class=MsoNormal><i>Institute of Materials Science, Technische Universität
Darmstadt, Germany<o:p></o:p></i></p>
<p class=MsoNormal><b><span lang=EN-US style='font-size:16.0pt'><o:p> </o:p></span></b></p>
<p class=MsoNormal><b><span lang=EN-US style='font-size:16.0pt'>Application and
Research in Piezoceramics<o:p></o:p></span></b></p>
<p class=MsoNormal><span lang=EN-US style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal style='margin-bottom:6.0pt;text-align:justify'><span
lang=EN-US>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. <o:p></o:p></span></p>
<p class=MsoNormal style='text-align:justify'><span lang=EN-US>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.<o:p></o:p></span></p>
<p class=MsoNormal style='text-align:justify'><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><b><span lang=EN-US style='font-size:14.0pt'><o:p> </o:p></span></b></p>
<p class=MsoNormal><b><span lang=EN-US style='font-size:14.0pt'>We look forward
to meeting you at the “Kolokvij na IJS”!<o:p></o:p></span></b></p>
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