1. A Novel Chemical Route to Prepare La2 Zr2 O7 Pyrochlore.
- Author
-
Kong, Linggen, Karatchevtseva, Inna, Gregg, Daniel J., Blackford, Mark G., Holmes, Rohan, Triani, Gerry, and Vanderah, T.
- Subjects
LANTHANUM ,AQUEOUS solutions ,PYROCHLORE ,ISOSTATIC pressing ,POWDER metallurgy ,ELECTRON diffraction - Abstract
Lanthanum zirconate has been prepared via a new chemical synthesis method by combining sol-gel processing and complex precipitation. The synthesis was carried out in aqueous solution under ambient conditions. The synthesized powder possessed the pyrochlore superstructure upon calcination above 1200°C. A suite of characterization techniques, including FTIR, Raman, X-ray and electron diffraction, TEM, SEM, and nitrogen sorption were employed to investigate the microstructural evolution and bulk properties. Dense ceramics (>90% relative density) were obtained after sintering at 1400°C, without need for additional processing (i.e., hot or cold isostatic pressing) or any milling steps. A mechanism has been proposed that elucidates molecular assembly of this chemical synthesis method. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF