Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 482, Issue 1-2, Pages 137-140Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2009.02.137
Keywords
BaTiO3; Sol-gel process; Grain size; Electronic properties
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Funding
- National Natural Science Foundation of China [50602021]
- National High Technology Research and Development Program of China [2006AA03Z437]
- Research Foundation of Liaocheng University [X071001]
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BaTiO3 nanopowders were synthesized from alkoxide solution precursor by sol-gel process. Attempts had been made to understand the synthesis process with the help of thermo gravimetric (TG) and differential scanning calorimetry (DSC). XRD and SEM results showed that the BaTiO3 powders calcined at 700 degrees C for 2 h were maintained in cubic phase and the average size was 25 nm. The effects of the initial grain sizes of BaTiO3 powders on the phase structures, microstructures and dielectric properties of the ceramics were investigated. The results indicated that both the grain size and the relative density of the ceramics increased with the increase in sintered temperature. The permittivity at room temperature was not sensitive to the grain size. (c) 2009 Published by Elsevier B.V.
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