Effect of calcination conditions on phase formation and particle size of zinc niobate powders synthesized by solid-state reaction

• Main Authors: Ngamjarurojana A., Khamman O., Yimnirun R., Ananta S.
• Format: Article
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-33746355988&partnerID=40&md5=7ce43292366cdbd03e606b1ec401409f; http://cmuir.cmu.ac.th/handle/6653943832/5075
• Institution: Chiang Mai University

A columbite-like phase of zinc niobate, ZnNb2O6, has been synthesized by a solid-state reaction via a rapid vibro-milling technique. The formation of the ZnNb2O6 phase in the calcined powders has been investigated as a function of calcination conditions by TG-DTA and XRD techniques. Morphology, particle size and chemical composition have been determined via a combination of SEM and EDX techniques. It has been found that single-phase ZnNb2O6 powders were successfully obtained for calcination condition of 600 °C for 2 h or 550 °C for 6 h with heating/cooling rates of 30 °C/min. Clearly, this study has demonstrated the potentiality of a vibro-milling technique as a significant time-saving method to obtain single-phase ZnNb2O6 nanopowders (∼50-300 nm) at low calcination temperature. © 2006 Elsevier B.V. All rights reserved.