The Preparation of Pure and Phosphrous-Doped La2Mo2O9 Oxide Ion Conductor by a Modified Precipitation Method
| Autor: | Feng Yang Dai, Yong Liang Wang, Qin Li, Li Wei Zhang, Li Guo Jin |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Precipitation (chemistry) Scanning electron microscope Mechanical Engineering Doping Analytical chemistry chemistry.chemical_element Conductivity Condensed Matter Physics Dielectric spectroscopy chemistry Mechanics of Materials Electrical resistivity and conductivity Lanthanum General Materials Science Thermal analysis |
| Zdroj: | Materials Science Forum. 852:963-968 |
| ISSN: | 1662-9752 |
| Popis: | Lanthanum molybdate, La2Mo2O9, has been attracted considerable attention owing to its high concentration of intrinsic oxygen vacancies. In this paper, pure and phosphrous-doped La2Mo2O9 (LAMOX) is prepared by means of a modified precipitation method. The properties of the series of compounds have been characterized by thermal analysis (TGA-DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and conductivity measured by a.c. impedance spectroscopy (IS). The electrical conductivity of pure La2Mo2O9 prepared by this method reaches a value of 0.15 S/cm at 800 °C, much higher than that of the sol-gel prepared material. P-doped La2Mo2O9 underwent a slightly structural phase transition, and the transition temperature is found to decrease with increasing P content. Electrical conductivity measurements show a slightly increase in the conductivity at low temperature after the tiny doping of P. |
| Databáze: | OpenAIRE |
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