期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 402, 期 1-2, 页码 263-268出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2005.04.153
关键词
(Zn,Co)TiO3; sol-gel route; two-step heat treatment; crystalline grain size
Purely hexagonal ilmenite-type zinc metatitanate (ZnTiO3) and (Zn1-xCox)TiO3 (x = 0.5-1) ceramic powders were successfully synthesized at low temperature by a sol-gel route including the Pechini process. The process was modified by using a two-step heat treatment so as to obtain pure products, as was proved by the XRD, FT-IR and TG-DTA measurements. The thermodynamic stability of (Zn1-xCox)TiO3 products improved with increasing solubility x. The average crystalline grain sizes of the final products varied from similar to 220 to 100 nm with increasing solubility x as confirmed by FE-SEM observation. The dielectric properties of (Zn1-xCox,)TiO3 were measured at different frequencies and the results showed that there existed maximum values both for the dielectric constants and the loss tangents at x = 0.5. (c) 2005 Elsevier B.V. All rights reserved.
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