ELECTRICAL CHARACTERIZATION OF SPHERICAL LN(2)ZR(2)O(7) (LN=LA, ND, DY) PREPARED VIA A LOW-TEMPERATURE SOL-GEL ROUTE

Authors
BHATTACHARYA AK BISWAS RG HARTRIDGE A MALLICK KK
Citation
Ak. Bhattacharya et al., ELECTRICAL CHARACTERIZATION OF SPHERICAL LN(2)ZR(2)O(7) (LN=LA, ND, DY) PREPARED VIA A LOW-TEMPERATURE SOL-GEL ROUTE, European journal of solid state and inorganic chemistry, 33(5), 1996, pp. 441-452
Citations number
13
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
European journal of solid state and inorganic chemistry → ACNP
ISSN journal
09924361
Volume
33
Issue
5
Year of publication
1996
Pages
441 - 452
Database
ISI
SICI code
0992-4361(1996)33:5<441:ECOSL(>2.0.ZU;2-K
Abstract
Spherical particles of lanthanide zirconates Ln(2)Zr(2)O(7) (Ln=La,Nd, Dy) were prepared by an aqueous inorganic sol-gel route. Characterisat ion was by X-ray diffraction, scanning electron microscopy, differenti al thermal analysis, thermogravimetric analysis and complex impedance spectroscopy. Calcination of the gel spheres at 750 degrees C produced fully crystalline fluorite phases. Further calcination above 850 degr ees C produced pyrochlore phases with La and Nd. Activation energies a nd pre-exponential factors were calculated from complex impedance curv es obtained in the temperatures range 570-1000K.