Effects of sintering temperature on structural and electrical properties of La2Mo2O9 prepared via solution combustion technique
| Autor: | Amar Jyoti Saikia, Diptimayee Tripathy, Gyati Tachang Tado, Arvind Pandey |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Carbon: Science and Technology, Vol 11, Iss 2, Pp 85-93 (2019) |
| Druh dokumentu: | article |
| ISSN: | 0974-0546 44222815 |
| Popis: | Effects of sintering temperature on structural and electrical properties of La2Mo2O9 synthesized via solution combustion method are addressed in this work. Single phase of La2Mo2O9 was obtained at relatively lower calcination temperature ( about 700 oC) than the conventional route. The synthesized specimen was sintered at three different temperatures 800 oC, 900 oC and 1000 oC for 12 hours and was subjected to structural & electrical characterizations. X-Ray diffraction pattern confirms the formation of monoclinic phase with space group P213 for all three sintering temperatures. Lattice parameters were calculated using Reitveld technique and found to be increased with the sintering temperature. α to β phase transition is prominent in the Arrhenius plot of all the sintered samples but the transition temperature is lower than the powders obtained by the solid state technique. Conductivity was found to be increased slightly at lower and intermediate temperatures for 900 oC and 1000 oC as compared to specimen sintered at 800 oC. In the intermediate temperatures, grain boundary contribution to the total resistance is more distinguished in the Nyquist plot of the sample sintered at 800 oC which causes the decrement in the conductivity. Activation energy in the temperature range 600 oC - 750 oC for the sample sintered at 800 oC, 900 oC and 1000 oC are 0.5298 eV, 0.35896 eV and 0.35805 eV respectively. The sample sintered at 1000 oC exhibited highest ionic conductivity 0.0391 S.cm-1 at 750 oC. |
| Databáze: | Directory of Open Access Journals |
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