Shivakumara, C. ; Hegde, M. S. ; Prakash, A. S. ; Khadar, A. M. A. ; Subbanna, G. N. ; Lalla, N. P. (2003) Low temperature synthesis, structure and properties of alkali-doped La2NiO4, LaNiO3 and LaNi0.85Cu0.15O3 from alkali hydroxide fluxes Solid State Sciences, 5 (2). pp. 351-357. ISSN 1293-2558
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S12932...
Related URL: http://dx.doi.org/10.1016/S1293-2558(02)00056-0
Abstract
We report a low-temperature synthesis of La1.95Na0.05NiO4 from NaOH flux, La0.97K0.03NiO3 and La0.95K0.05Ni0.85Cu0.15O3 phases from KOH flux at 400 °C. Alkali-doped LaNiO3 can be prepared in KOH, but not in NaOH flux and La2NiO4 can be prepared in NaOH, but not in KOH flux. The flux-grown oxides were characterized by powder X-ray Rietveld profile analysis and electron microscopy. Sodium doped La2NiO4 crystallizes in orthorhombic structure and potassium doped LaNiO3-phases crystallizes in rhombohedral structure. La1.95Na0.05NiO4 is weakly paramagnetic and semiconducting while La0.97K0.03NiO3 and La0.95K0.05Ni0.85Cu0.15O3 show Pauli paramagnetic and metallic behavior.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Lanthanum Nickel Oxides; Alkali Hydroxide Fluxes; Cu-substituted LaNiO3; Alkali Metal Substitution |
| ID Code: | 15848 |
| Deposited On: | 13 Nov 2010 12:26 |
| Last Modified: | 03 Jun 2011 07:41 |
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