Influence of Sintering Temperature on Densification and Microstructure of Zn₃Nb₂O₈ Ceramics Derived from Nanopowders

Abstract:

Zinc niobate, Zn₃Nb₂O₈, dielectric ceramics were fabricated by sintering Zn₃Nb₂O₈ nanopowders derived from a rapid vibro-milling technique at various temperatures. Phase formation, densification, microstructure and dielectric properties of the ceramics were investigated as a function of sintering temperatures (1000-1200°C), using a combination of X-ray diffraction, Archimedes density measurement, scanning electron microscopy and dielectric measurement, respectively. It has been found that single-phase Zn₃Nb₂O₈ ceramics with maximum density of ~98% theoretical density can be successfully produced with appropriate firing temperature, without any firing additives. Moreover, it is seen that the dielectric properties are found to enhance with increasing sintering temperature and grain size.

• Periodical: Advanced Materials Research (Volumes 194-196)
• Pages: 656-659
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.194-196.656
• Online since: February 2011
• Authors: Phakkhananan Pakawanit, Supon Ananta
• Keywords: Densification, Microstructure, Sintering, Zinc Niobate

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