Phase and Chemical Characterization of Perovskite Lead Nickel Niobate Ceramics Fabricated Via a Columbite Precursor Method
Laongnuan Srisombat, Orawan Khamman, Rattikorn Yimnirun, Supon Ananta, and T. Randall Lee Rungsun Nu* Author for corresponding; e-mail address: slaongnuan@yahoo.com
Volume: Vol.36 No.1 (JANUARY 2009)
Research Article
DOI:
Received: 1 November 2008, Revised: -, Accepted: 15 December 2008, Published: -
Citation: Srisombat L., Khamman O., Yimnirun R., Ananta S. and Nu T.R.L.R., Phase and Chemical Characterization of Perovskite Lead Nickel Niobate Ceramics Fabricated Via a Columbite Precursor Method, Chiang Mai Journal of Science, 2009; 36(1): 69-76.
Abstract
Perovskite relaxor ferroelectric lead nickel niobate (PNN) ceramics were fabricated by using B-site precursor method, in which columbite-NiNb2O6 was employed as key precursor. It has been found that optimization of sintering condition can successfully lead to highly dense PNN ceramics. Although XRD analysis revealed that the ceramics consist of pure perovskite phase, significant fluctuation in chemical composition, precipitation of unreacted precursor and the formation of unwanted phases were found via a combination between SEM EDX and XPS techniques