TU Darmstadt / ULB / TUbiblio

Multiscale and luminescent, hollow microspheres for gas phase thermometry

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, 8 (1)
doi: 10.1038/s41598-017-18942-2
Article, Bibliographie

This is the latest version of this item.

Abstract

© 2018 The Author(s). 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 Eu 3+ -doped Y 2 O 3 , 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 Y 2 O 3 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.

Item Type: Article
Erschienen: 2018
Creators: Bischoff, Lothar ; Stephan, Michael ; Birkel, Christina S. ; Litterscheid, Christian F. ; Dreizler, Andreas ; Albert, Barbara
Type of entry: Bibliographie
Title: Multiscale and luminescent, hollow microspheres for gas phase thermometry
Language: English
Date: 2018
Publisher: Springer Nature
Journal or Publication Title: Scientific Reports
Volume of the journal: 8
Issue Number: 1
DOI: 10.1038/s41598-017-18942-2
Corresponding Links:
Abstract:

© 2018 The Author(s). 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 Eu 3+ -doped Y 2 O 3 , 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 Y 2 O 3 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.

Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Theory of Magnetic Materials
07 Department of Chemistry
07 Department of Chemistry > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie
07 Department of Chemistry > Eduard Zintl-Institut
Date Deposited: 01 Feb 2023 07:44
Last Modified: 03 Jul 2024 02:59
PPN:
Export:
Suche nach Titel in: TUfind oder in Google

Available Versions of this Item

Send an inquiry Send an inquiry

Options (only for editors)
Show editorial Details Show editorial Details