Project description
By doping monodisperse ZrO2-microparticles with various metal cations we enhance their thermal durability to enable their application as high temperature photonic materials. Especially, we study the use of these particles as building blocks for the assembly of thermal barrier coatings and absorber/emitter in thermophotovoltaic systems, in close collaboration with C1, C2, and C4. In this context, we also characterize the particles’ crystalline phases, grain growth and microstrain together with C5, Z2, and Z3.
Further, we study the possibility of improving the particles’ thermal stability by depositing an outer Al2O3 shell. Core-shell submicroparticles consisting of stabilized ZrO2@Al2O3 are highly promising materials for the fabrication of thermally stable structural colors. In a first approach, ZrO2@SiO2 core-shell particles are used as a model system and the optical properties of their assemblies are investigated together with projects C2 and C4.
In addition, we also study the synthesis of metallodielectric core-shell-shell particles. Their high temperature optical properties are characterized in collaboration with C1. Such particles are of great interest for the fabrication of novel narrow band absorber/emitter for highly efficient thermophotovoltaic systems.
Project leaders | |
 | Dr. rer. nat. Tobias Vossmeyer, UHH Contact |
 | Prof. Dr. rer. nat. Horst Weller, UHH Contact |
Keywords
microparticles
thermal barrier coatings
structural colors
ceramics
doping
core-shell particles
Publications
1. E. Leib et al.: High-Temperature Stable Zirconia Particles Doped with Yttrium, Lanthanum, and Gadolinium. Particle & Particle Systems Characterization 33, 645-655, 2016 - with C5, Z2, A1
2. E. Leib et al.: Yttria-stabilized zirconia microspheres: novel building blocks for high-temperature photonics. Journal of Materials Chemistry C 4, 62-74, 2016 - with C2, C4, C5, A1
3. A. Petrov et al.: Synthesis and characterization of monodisperse metallodielectric SiO2@Pt@SiO2 core-shell-shell particles. Langmuir 32, 848-857, 2016 - with A1
... and more on the list of publications.
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