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Publisher DOI: 10.1016/j.jeurceramsoc.2021.02.007
Title: Improved thermal stability of zirconia macroporous structures via homogeneous aluminum oxide doping and nanostructuring using atomic layer deposition
Language: English
Authors: Gehensel, Raphael J. 
Zierold, Robert 
Schaan, Gunnar 
Shang, Guoliang 
Petrov, Alexander  
Eich, Manfred 
Blick, Robert H. 
Krekeler, Tobias 
Janßen, Rolf 
Pagnan Furlan, Kaline  
Keywords: Atomic layer deposition; Ceramics; High-temperature applications; Inverse opals; Porous materials
Issue Date: 11-Feb-2021
Publisher: Elsevier Science
Source: Journal of the European Ceramic Society 41 (7): 4302-4312 (2021-07-01)
Abstract (english): 
Dopants are regularly used in sol-gel and powder metallurgy routes, however, the controlled insertion of such is quite challenging, especially in the case of nanostructures. Here we investigate the use of atomic layer deposition (ALD) as a potential technique to precisely introduce aluminum oxide as dopant or second phase into zirconia 3D macroporous nanostructures. The results show that the introduction of high Al O contents into the zirconia nanostructures successfully inhibited sintering when in comparison to undoped zirconia. Moreover, for the multi-nanolaminated and full-mix structures, the tetragonal phase was stabilized up to 1200 °C. Furthermore, the structures presented a photonic band gap even after heat treatment at 1200 °C for 2 h, enabling its application as inverse opal photonic crystals in high-temperature environments. The enhancement of thermal stability and high-temperature tetragonal phase stabilization is enabled jointly by the nanostructuring and homogeneous distribution of aluminum oxide provided by ALD super-cycles. 2 3
DOI: 10.15480/882.3481
ISSN: 0955-2219
Journal: Journal of the European Ceramic Society 
Institute: Keramische Hochleistungswerkstoffe M-9 
Betriebseinheit Elektronenmikroskopie M-26 
Optische und Elektronische Materialien E-12 
Integrated Ceramic-based Materials Systems M-EXK3 
Document Type: Article
Project: SFB 986: Teilprojekt C4 - Deposition, Ordnung und mechanische Stabilität von Beschichtungen aus assemblierten Partikeln mit enger Größenverteilung 
SFB 986: Zentralprojekt Z3 - Elektronenmikroskopie an multiskaligen Materialsystemen 
SFB 986: Teilprojekt C02 - Keramikbasierte hochtemperaturstabile Wärmestrahlungsreflektoren und Strukturfarben 
SFB 986: Teilprojekt C05 - Oxidische Hochtemperatur-Schutzschichtsysteme mittels angepasster Porenstruktur 
Funded by: Deutsche Forschungsgemeinschaft (DFG) 
License: CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives) CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives)
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