Nanosize NiO/YSZ powders produced by ICP technique
The plasma synthesis of nanosize NiO/ZrO 2 and NiO/YSZ powders has been developed by introducing a mixture of coarse-grained zirconia, yttria and nickel oxide into an inductively coupled plasma flame. The average particle size of the prepared powder is in the range of 16–55 nm and specific surface a...
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Published in | Journal of the European Ceramic Society Vol. 17; no. 12; pp. 1437 - 1442 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Oxford
Elsevier Ltd
1997
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | The plasma synthesis of nanosize NiO/ZrO
2 and NiO/YSZ powders has been developed by introducing a mixture of coarse-grained zirconia, yttria and nickel oxide into an inductively coupled plasma flame. The average particle size of the prepared powder is in the range of 16–55 nm and specific surface area is 15–35 m
2 g
−1. The phase and granulometric composition of the powders produced depend on reagent concentration in the plasma flame and cooling rate, on the content of Y
2O
3 and NiO. In the NiO/ZrO
2 system NiO increases the fraction of the metastable tetragonal phase of ZrO
2 but in the NiO/YSZ system promotes formation of non-transformable t′-phase and cubic ZrO
2.
Es wurde ein Herstellungsverfahren von feinen, kugelförmigen NiO/ZrO
2 und NiO/YSZ Teilchen durch verdampfen der Yttriumoxyd, Nickel (II)-oxyd und Zirkoniumdioxyd Mischung in Induktion-splasmastrohm ausgearbeitet. Die Korngröβe des Nanopulvers beträgt 16–55 nm, die spezifische Oberfläche 15–35 m
2 g
−1. Die Reagentienkonzentrationen in Plasmastrohm, Kühlungsgeschhwindigkeit und Verhältnisse zwischen Ausgangsstoffen bestimmen die granulometrische und Phasenzusammenstzung des Produkts. Durch NiO wird der Auteil des metastabillen tetragonallen ZrO
2 im System NiO/ZrO
2 vergröβert. Im System NiO/YSZ stimuliert NiO die Bildung von t′-ZrO
2 und c-ZrO
2. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0955-2219 1873-619X |
DOI: | 10.1016/S0955-2219(97)89405-8 |