Sol-gel synthesis of fine Gd{sub 2}CuO{sub 4} particles: Influence of synthesis variables
- Univ. of Santiago de Compostela (Spain). Faculty of Chemistry and Physics
- San Diego State Univ., CA (United States)
Fine particles of Gd{sub 2}CuO{sub 4} were prepared by a sol-gel reaction of an aqueous solution of metal nitrates in the presence of urea, which leads to high-homogeneity polycrystalline powders of Gd{sub 2}CuO{sub 4}. The authors have studied the synthesis conditions, demonstrating the existence of a relationship between the calcination temperature and the heating time needed to attain the pure phase. Gd{sub 2}CuO{sub 4} was obtained at temperatures of the order of 650 C, lower than temperatures employed in the conventional ceramic technique. The influence of the [urea]/[salts] ratio and an excess of Cu(II) in the starting solution was also studied and discussed. X-ray powder diffraction inductively coupled plasma atomic emission spectroscopy (ICPAES), photon correlation spectroscopy (PCS), and transmission electron microscopy (TEM) were used to characterize the Gd{sub 2}CuO{sub 4} samples obtained.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 211700
- Journal Information:
- Journal of the American Ceramic Society, Vol. 79, Issue 2; Other Information: PBD: Feb 1996
- Country of Publication:
- United States
- Language:
- English
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