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Structural and electrical characterisation of Er2-xPrxTi2O7 (0<x<0.4) pyrochlores
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UNSPECIFIED (1996) Structural and electrical characterisation of Er2-xPrxTi2O7 (0<x<0.4) pyrochlores. EUROPEAN JOURNAL OF SOLID STATE AND INORGANIC CHEMISTRY, 33 (7). pp. 659-671. ISSN 0992-4361.
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Abstract
In this paper we show for the first time the preparation of free flowing spherical Er2-xPrxTi2O7 (0<x<0.4) particles prepared via a low temperature inorganic sol-gel route. The gel spheres were amorphous at room temperature, but calcining at 850 degrees C produced single phase material with the pyrochlore structure. Materials were characterised using scanning electron microscopy, X-ray diffraction, simultaneous differential thermal and thermogravimetric analysis and by impedance spectroscopy. SEM results indicated that the gel spheres had diameters between 30 mu m and 85 mu m. Arrhenius plots of the conductivity data showed that Er2Ti2O7 could be described by a single activation energy of 124 kJ/mol. Doping with praseodymium (x=0.4) reduced the activation energy to 100 kJ/mol (above 890 K) and increased the conductivity.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry | ||||
Journal or Publication Title: | EUROPEAN JOURNAL OF SOLID STATE AND INORGANIC CHEMISTRY | ||||
Publisher: | GAUTHIER-VILLARS | ||||
ISSN: | 0992-4361 | ||||
Official Date: | 1996 | ||||
Dates: |
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Volume: | 33 | ||||
Number: | 7 | ||||
Number of Pages: | 13 | ||||
Page Range: | pp. 659-671 | ||||
Publication Status: | Published |
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