Influence of calcination conditions on phase formation and particle size of indium niobate powders synthesized by the solid-state reaction

• Main Authors: Wongsaenmai S., Yimnirun R., Ananta S.
• Format: Article
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-34249799318&partnerID=40&md5=3538034d729ea02292d45064c8c299bc; http://cmuir.cmu.ac.th/handle/6653943832/5242
• Institution: Chiang Mai University

A wolframite-type phase of indium niobate, InNbO4, has been synthesized by a solid-state reaction via a rapid vibro-milling technique. The formation of the InNbO4 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. Single-phase InNbO 4 powders have been obtained successfully for calcination condition of 900°C for 4h or 950°C for 2h with heating/cooling rates of 30°C/min. Higher temperatures and longer dwell times clearly favoured particle growth and the formation of large and hard agglomerates. © Springer Science+Business Media, LLC 2007.