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2005
Titanium
I 4300
29- 027
Synthesis of Disordered Pyrochlores, Ln2Ti2O7 (Ln: Y, Gd and Dy), by Mechanical
Milling of Constituent Oxides. — Single-phase samples of the title compounds are
prepared from stoichiometric mixtures of TiO2 and Ln2O3 by ball milling for 1—19 h
at room temperature. The samples are characterized by powder XRD, DTA, SEM,
TEM, and IR and Raman spectroscopy. The Dy containing compound is of interest because of its unusual magnetic properties at low temperature and spin-ice behavior. The
Gd and Y containing compounds have deserved much attention because of their electrical properties. — (FUENTES*, A. F.; BOULAHYA, K.; MACZKA, M.; HANUZA,
J.; AMADOR, U.; Solid State Sci. 7 (2005) 4, 343-353; CINVESTAV-Unidad, 25000
Saltillo, Mex.; Eng.) — W. Pewestorf
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