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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>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br>
<br>
<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;text-justify:inter-ideograph'><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;text-justify:inter-ideograph'><span
style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-align:justify;text-justify:inter-ideograph'>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;text-justify:inter-ideograph'>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;text-justify:inter-ideograph'><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><span lang=EN-US>********************************************<br>
<br>
</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;text-justify:
inter-ideograph'><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;text-justify:inter-ideograph'><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;text-justify:inter-ideograph'><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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