Morphology effect dependent of the synthesis method of K<inf>x</inf>Ir <inf>1-x</inf>O<inf>2</inf> system

E. Ramírez, E. Chavira, L. Baños, A. B.Soto Guzmán, J. Guzmán, C. Flores

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

Recently ternary oxides containing both alkaline-earth metal and platinum group metal have attracted attention due to their wide range of electrical and magnetic properties. Particularly, mixed metal oxides contained iridium has been the interest of a lot of research activity [1-4]. We focus our attention on the synthesis of the KxIr1-xO2 with 0.00 < x < 0.25 solid solution (ss). The ss was obtained by the solid-state reaction and sol-gel method via acrylamide polymerization using IrO2 and K2CO3 as starting materials. The sample prepared by solid-state reaction and annealed at 650°C for 170 h showed a DRX pattern with signals comparables to IrO2 compound. However, 2θ displacements have been observed. These displacements seem to be attributable to the potassium ion introduction to the IrO2 structure. On the other hand, the xerogel produced by sol-gel method via acrylamide polymerization annealed between 500°C and 630°C generates XRD patterns that show the co-existence of hollandite, K0.25IrO2, (PDF 85-2185) Ir (PDF 87-0715) and IrO2 (PDF 15-0870) signals. Following thermal treatment at 650°C for 170 h we have only signals corresponding to IrO 2 with tetragonal structure. Similar 26 displacements of the samples were observed by solid-state reaction and sol-gel method via acrylamida polymerization. The morphology of the samples was observed through SEM. The sol-gel process generates very thin crystals with form of needles with thickness between 100-150 nm and the ss obtained by solid-state reaction produce aggregates.
Original languageAmerican English
Pages830-833
Number of pages746
StatePublished - 8 Dec 2006
Externally publishedYes
Event2006 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2006 Technical Proceedings -
Duration: 8 Dec 2006 → …

Conference

Conference2006 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2006 Technical Proceedings
Period8/12/06 → …

Fingerprint

Solid state reactions
Sol-gel process
Solid solutions
Acrylamide
Polymerization
Oxides
Metals
Alkaline Earth Metals
Iridium
Alkaline earth metals
Xerogels
Platinum
Needles
Potassium
Magnetic properties
Electric properties
Heat treatment
Ions
Crystals
Scanning electron microscopy

Cite this

Ramírez, E., Chavira, E., Baños, L., Guzmán, A. B. S., Guzmán, J., & Flores, C. (2006). Morphology effect dependent of the synthesis method of K<inf>x</inf>Ir <inf>1-x</inf>O<inf>2</inf> system. 830-833. Paper presented at 2006 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2006 Technical Proceedings, .
Ramírez, E. ; Chavira, E. ; Baños, L. ; Guzmán, A. B.Soto ; Guzmán, J. ; Flores, C. / Morphology effect dependent of the synthesis method of K<inf>x</inf>Ir <inf>1-x</inf>O<inf>2</inf> system. Paper presented at 2006 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2006 Technical Proceedings, .746 p.
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abstract = "Recently ternary oxides containing both alkaline-earth metal and platinum group metal have attracted attention due to their wide range of electrical and magnetic properties. Particularly, mixed metal oxides contained iridium has been the interest of a lot of research activity [1-4]. We focus our attention on the synthesis of the KxIr1-xO2 with 0.00 < x < 0.25 solid solution (ss). The ss was obtained by the solid-state reaction and sol-gel method via acrylamide polymerization using IrO2 and K2CO3 as starting materials. The sample prepared by solid-state reaction and annealed at 650°C for 170 h showed a DRX pattern with signals comparables to IrO2 compound. However, 2θ displacements have been observed. These displacements seem to be attributable to the potassium ion introduction to the IrO2 structure. On the other hand, the xerogel produced by sol-gel method via acrylamide polymerization annealed between 500°C and 630°C generates XRD patterns that show the co-existence of hollandite, K0.25IrO2, (PDF 85-2185) Ir (PDF 87-0715) and IrO2 (PDF 15-0870) signals. Following thermal treatment at 650°C for 170 h we have only signals corresponding to IrO 2 with tetragonal structure. Similar 26 displacements of the samples were observed by solid-state reaction and sol-gel method via acrylamida polymerization. The morphology of the samples was observed through SEM. The sol-gel process generates very thin crystals with form of needles with thickness between 100-150 nm and the ss obtained by solid-state reaction produce aggregates.",
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Ramírez, E, Chavira, E, Baños, L, Guzmán, ABS, Guzmán, J & Flores, C 2006, 'Morphology effect dependent of the synthesis method of K<inf>x</inf>Ir <inf>1-x</inf>O<inf>2</inf> system', Paper presented at 2006 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2006 Technical Proceedings, 8/12/06 pp. 830-833.

Morphology effect dependent of the synthesis method of K<inf>x</inf>Ir <inf>1-x</inf>O<inf>2</inf> system. / Ramírez, E.; Chavira, E.; Baños, L.; Guzmán, A. B.Soto; Guzmán, J.; Flores, C.

2006. 830-833 Paper presented at 2006 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2006 Technical Proceedings, .

Research output: Contribution to conferencePaper

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T1 - Morphology effect dependent of the synthesis method of KxIr 1-xO2 system

AU - Ramírez, E.

AU - Chavira, E.

AU - Baños, L.

AU - Guzmán, A. B.Soto

AU - Guzmán, J.

AU - Flores, C.

PY - 2006/12/8

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N2 - Recently ternary oxides containing both alkaline-earth metal and platinum group metal have attracted attention due to their wide range of electrical and magnetic properties. Particularly, mixed metal oxides contained iridium has been the interest of a lot of research activity [1-4]. We focus our attention on the synthesis of the KxIr1-xO2 with 0.00 < x < 0.25 solid solution (ss). The ss was obtained by the solid-state reaction and sol-gel method via acrylamide polymerization using IrO2 and K2CO3 as starting materials. The sample prepared by solid-state reaction and annealed at 650°C for 170 h showed a DRX pattern with signals comparables to IrO2 compound. However, 2θ displacements have been observed. These displacements seem to be attributable to the potassium ion introduction to the IrO2 structure. On the other hand, the xerogel produced by sol-gel method via acrylamide polymerization annealed between 500°C and 630°C generates XRD patterns that show the co-existence of hollandite, K0.25IrO2, (PDF 85-2185) Ir (PDF 87-0715) and IrO2 (PDF 15-0870) signals. Following thermal treatment at 650°C for 170 h we have only signals corresponding to IrO 2 with tetragonal structure. Similar 26 displacements of the samples were observed by solid-state reaction and sol-gel method via acrylamida polymerization. The morphology of the samples was observed through SEM. The sol-gel process generates very thin crystals with form of needles with thickness between 100-150 nm and the ss obtained by solid-state reaction produce aggregates.

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Ramírez E, Chavira E, Baños L, Guzmán ABS, Guzmán J, Flores C. Morphology effect dependent of the synthesis method of K<inf>x</inf>Ir <inf>1-x</inf>O<inf>2</inf> system. 2006. Paper presented at 2006 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2006 Technical Proceedings, .