Bischoff, Lothar ; Stephan, Michael ; Birkel, Christina S. ; Litterscheid, Christian F. ; Dreizler, Andreas ; Albert, Barbara (2018)
Multiscale and luminescent, hollow microspheres for gas phase thermometry.
In: Scientific Reports, 2018, 8 (1)
doi: 10.1038/s41598-017-18942-2
Artikel, Zweitveröffentlichung, Verlagsversion
 | Es ist eine neuere Version dieses Eintrags verfügbar. |
Kurzbeschreibung (Abstract)
Recently developed laser-based measurement techniques are used to image the temperatures and velocities in gas flows. They require new phosphor materials with an unprecedented combination of properties. A novel synthesis procedure is described here; it results in hierarchically structured, hollow microspheres of Eu3+-doped Y2O3, with unusual particle sizes and very good characteristics compared to full particles. Solution-based precipitation on polymer microballoons produces very stable and luminescent, ceramic materials of extremely low density. As a result of the – compared to established template-directed syntheses – reduced mass of polymer that is lost upon calcination, micron-sized particles are obtained with mesoporous walls, low defect concentrations, and nanoscale wall thicknesses. They can be produced with larger diameters (~25 µm) compared to known hollow spheres and exhibit an optimized flow behavior. Their temperature sensing properties and excellent fluidic follow-up behavior are shown by determining emission intensity ratios in a specially designed heating chamber. Emission spectroscopy and imaging, electron microscopy and X-ray diffraction results are presented for aerosolizable Y2O3 with an optimized dopant concentration (8%). Challenges in the field of thermofluids can be addressed by combined application of thermometry and particle image velocimetry with such hollow microparticles.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Bischoff, Lothar ; Stephan, Michael ; Birkel, Christina S. ; Litterscheid, Christian F. ; Dreizler, Andreas ; Albert, Barbara |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Multiscale and luminescent, hollow microspheres for gas phase thermometry |
| Sprache: | Englisch |
| Publikationsjahr: | 2018 |
| Publikationsdatum der Erstveröffentlichung: | 2018 |
| Verlag: | Nature Publ. Group |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Scientific Reports |
| Jahrgang/Volume einer Zeitschrift: | 8 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.1038/s41598-017-18942-2 |
| URL / URN: | https://doi.org/10.1038/s41598-017-18942-2 |
| Herkunft: | Zweitveröffentlichung aus gefördertem Golden Open Access |
| Kurzbeschreibung (Abstract): | Recently developed laser-based measurement techniques are used to image the temperatures and velocities in gas flows. They require new phosphor materials with an unprecedented combination of properties. A novel synthesis procedure is described here; it results in hierarchically structured, hollow microspheres of Eu3+-doped Y2O3, with unusual particle sizes and very good characteristics compared to full particles. Solution-based precipitation on polymer microballoons produces very stable and luminescent, ceramic materials of extremely low density. As a result of the – compared to established template-directed syntheses – reduced mass of polymer that is lost upon calcination, micron-sized particles are obtained with mesoporous walls, low defect concentrations, and nanoscale wall thicknesses. They can be produced with larger diameters (~25 µm) compared to known hollow spheres and exhibit an optimized flow behavior. Their temperature sensing properties and excellent fluidic follow-up behavior are shown by determining emission intensity ratios in a specially designed heating chamber. Emission spectroscopy and imaging, electron microscopy and X-ray diffraction results are presented for aerosolizable Y2O3 with an optimized dopant concentration (8%). Challenges in the field of thermofluids can be addressed by combined application of thermometry and particle image velocimetry with such hollow microparticles. |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-72035 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut |
| Hinterlegungsdatum: | 21 Jan 2018 20:55 |
| Letzte Änderung: | 03 Jul 2024 02:59 |
| PPN: | |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
- Multiscale and luminescent, hollow microspheres for gas phase thermometry. (deposited 21 Jan 2018 20:55) [Gegenwärtig angezeigt]
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum