<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>17854</id>
    <completedYear/>
    <publishedYear>2008</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>260</pageFirst>
    <pageLast>267</pageLast>
    <pageNumber/>
    <edition/>
    <issue>3</issue>
    <volume>47</volume>
    <type>article</type>
    <publisherName>Kluwer Academic Publ.</publisherName>
    <publisherPlace>Dordrecht</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Influence of polyvinylpyrrolidone (PVP) on alumina sols prepared by a modified Yoldas procedure</title>
    <abstract language="eng">Al13 polycations containing alumina sols, prepared by a modified Yoldas procedure were mixed with polyvinylpyrrolidone (PVP). Although Al speciation in freshly prepared sols was not affected by PVP addition the decay rate of Al13 polycations was slightly decreased in PVP-containing sols. PVP does not show any influence on particle size and particle growth. The influence of PVP addition on viscosity and flow behavior of modified Yoldas sols depends on their solids content and NO3-/Al molar ratio.</abstract>
    <parentTitle language="eng">Journal of sol gel science and technology</parentTitle>
    <identifier type="old">19947</identifier>
    <identifier type="doi">10.1007/s10971-008-1798-9</identifier>
    <identifier type="issn">0928-0707</identifier>
    <identifier type="issn">1573-4846</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="date_peer_review">11.09.2008</enrichment>
    <author>Martin Dreßler</author>
    <author>Marianne Nofz</author>
    <author>Jutta Pauli</author>
    <author>Christian Jäger</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>ModifiedYoldas sols</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>PVP</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>NMR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Rheology</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Particle size</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Aging</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
  <doc>
    <id>2668</id>
    <completedYear/>
    <publishedYear>2003</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>1</pageFirst>
    <pageLast>2</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation>Kristallographisches Institut, Universität Freiburg</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Phasentransformationen von anorganisch modifizierten Alumo-Xerogelen</title>
    <parentTitle language="deu">Jahrestagung der Gesellschaft für Thermische Analyse</parentTitle>
    <identifier type="old">2644</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">Jahrestagung der Gesellschaft für Thermische Analyse e.V.</enrichment>
    <enrichment key="eventPlace">Augsburg, Deutschland</enrichment>
    <enrichment key="eventStart">2003-09-15</enrichment>
    <enrichment key="eventEnd">2003-09-16</enrichment>
    <author>Stefan Reinsch</author>
    <author>Martin Dreßler</author>
    <author>Marianne Nofz</author>
    <author>Jutta Pauli</author>
    <author>Christian Jäger</author>
    <author>G. Scholz</author>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>12350</id>
    <completedYear/>
    <publishedYear>2006</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>25</pageFirst>
    <pageLast>35</pageLast>
    <pageNumber/>
    <edition/>
    <issue>1</issue>
    <volume>38</volume>
    <type>article</type>
    <publisherName>Kluwer Academic Publ.</publisherName>
    <publisherPlace>Dordrecht</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">27Al NMR Study of Al-Speciation in Aqueous Alumina-Sols</title>
    <abstract language="eng">A new method of preparing concentrated alumo-sols, the hydrolysis of Al-tri-sec-butylate in acidic aqueous media at 85°C, was studied in detail by varying the H2O/Al- and NO3 -/Al-ratios in wide ranges. The components of the sols were characterized by 27Al NMR spectroscopy. The pH-value depends on both the chosen H2O/Al- and NO3 -/Al-ratio and on the aging time of the sols and reflects the composition of the sols. Al13 polycations were detected in sols with a pH-value between 3.0 and 3.7. As a new result its presence was shown by NMR below 3.4. The Al13 content of the sols increased with pH and the maximum fraction of Al13 polycations was detected in the sol with the highest pH (3.7). Nearly 65% of the entire aluminium content of this solution is bound in the Al13 polycations. Hence, a new synthetic method for the preparation of Al13 ions containing sols was developed. 
Aging studies of the sols showed, that the Al13 polycations were more stable in solutions with higher pH-value. Al13 polycations were detected after an aging time of four months only in sols with a pH-value of 3.7. Tempering the aged sols at 40° to 80°C caused formation of Al13 and also of Al30 polycations.</abstract>
    <parentTitle language="eng">Journal of sol gel science and technology</parentTitle>
    <identifier type="old">14071</identifier>
    <identifier type="issn">0928-0707</identifier>
    <identifier type="issn">1573-4846</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="date_peer_review">15.05.2006</enrichment>
    <author>Marianne Nofz</author>
    <author>Jutta Pauli</author>
    <author>Martin Dreßler</author>
    <author>Christian Jäger</author>
    <author>Wolfgang Altenburg</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Alumo-sol</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Al13 polycations</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Al-27 NMR spectroscopy</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
  <doc>
    <id>16189</id>
    <completedYear/>
    <publishedYear>2007</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>2409</pageFirst>
    <pageLast>2419</pageLast>
    <pageNumber/>
    <edition/>
    <issue>9</issue>
    <volume>180</volume>
    <type>article</type>
    <publisherName>Elsevier</publisherName>
    <publisherPlace>San Diego, Calif.</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Aluminum speciation and thermal evolution of aluminas resulting from modified Yoldas sols</title>
    <abstract language="eng">Aluminas resulting from sols prepared via a modified Yoldas procedure were studied with differential thermal analysis (DTA), differential thermal gravimetrie (DTG), 27Al nuclear magnetic resonance (27Al MAS NMR) and X-ray diffraction (XRD) concerning their thermal properties, aluminum speciation and phase content.

Hydrolysis of aluminum-sec-butoxide in aluminum nitrate solutions allowed to prepare stable sols with varying  NO3-/Al molar ratios, solids contents and pH values. Resulting sols contained different aluminum species including also Al13 polycations. Sol preparation conditions also determined aluminum speciation in solid products obtained after thermal treatments of gels obtained from these sols. Al13 polycations and AlO5 species were found to play an important role for thermally induced transformation from amorphous products via eta-Al2O3 to alpha-Al2O3. Intermediately formed eta-Al2O3 promotes the phase transformation to alpha-Al2O3.</abstract>
    <parentTitle language="eng">Journal of solid state chemistry</parentTitle>
    <identifier type="old">18157</identifier>
    <identifier type="doi">10.1016/j.jssc.2007.06.018</identifier>
    <identifier type="issn">0022-4596</identifier>
    <identifier type="issn">1095-726X</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="date_peer_review">23.11.2007</enrichment>
    <author>Martin Dreßler</author>
    <author>Marianne Nofz</author>
    <author>Frank Malz</author>
    <author>Jutta Pauli</author>
    <author>Christian Jäger</author>
    <author>Stefan Reinsch</author>
    <author>G. Scholz</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Alumina</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Modified Yoldas sols</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>27Al nuclear magnetic resonance</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Differential thermal analysis</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>X-ray diffraction</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
</export-example>
