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| Home > Publications database > High-Temperature Stable Zirconia Particles Doped with Yttrium, Lanthanum, and Gadolinium |
| Home > Publications database > High-Temperature Stable Zirconia Particles Doped with Yttrium, Lanthanum, and Gadolinium |
| Journal Article | PUBDB-2017-00633 |
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2016
Wiley-VCH
Weinheim
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Please use a persistent id in citations: doi:10.1002/ppsc.201600069 doi:10.3204/PUBDB-2017-00633
Abstract: Zirconia microspheres synthesized by a wet-chemical sol–gel process arepromising building blocks for various photonic applications considered forheat management and energy systems, including highly effi cient refl ectivethermal barrier coatings and absorbers/emitters used in thermophotovoltaicsystems. As previously shown, pure zirconia microparticles deteriorate atworking temperatures of ≥1000 °C. While the addition of yttrium as a dopanthas been shown to improve their phase stability, pronounced grain growthat temperatures of ≥1000 °C compromises the photonic structure of theassembled microspheres. Here, a new approach for the fabrication of highlystable ceramic microparticles by doping with lanthanum, gadolinium, and acombination of those with yttrium is introduced. The morphological changesof the particles are monitored by scanning electron microscopy, ex situX-ray diffraction (XRD), and in situ high-energy XRD as a function of dopantconcentration up to 1500 °C. While the addition of lanthanum or gadoliniumhas a strong grain growth attenuating effect, it alone is insuffi cient to avoida destructive tetragonal-to-monoclinic phase transformation occurring afterheating to >850 °C. However, combining lanthanum or gadolinium withyttrium leads to particles with both effi cient phase stabilization and attenuatedgrain growth. Thus, ceramic microspheres are yielded that remainextremely stable after heating to 1200 °C.
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; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz
; SCOPUS ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection
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