Low temperature sintering of the alkali-niobate ceramics

Hwi Yeol Park, Sahn Nahm

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

(Na<inf>1-x</inf>K<inf>x</inf>)NbO<inf>3</inf> (NKN)-based lead-free ceramics have been extensively investigated for the replacement of Pb(Zr,Ti)O<inf>3</inf> (PZT)-based ceramics because of their high piezoelectric properties. However, the high sintering temperatures of NKN-based ceramics caused Na<inf>2</inf>O evaporation during sintering. Moreover, the Na<inf>2</inf>O evaporation reduced the polling efficiency and changed the microstructure and eventually degraded the piezoelectric properties of the NKN-based ceramics. Therefore, because the Na<inf>2</inf>O evaporation occurred at temperatures above 1,000°C, it is necessary to find a method to reduce the sintering temperature of the NKN-based ceramics to below 1,000°C in order to obtain reliable piezoelectric properties. In general, two methods have been used to reduce the sintering temperature of NKN-based ceramics (1) addition of sintering aids and (2) spark plasma sintering (SPS). In this chapter, detailed discussions about these two methods will be presented.

Original languageEnglish
Title of host publicationLead-Free Piezoelectrics
PublisherSpringer New York
Pages121-137
Number of pages17
ISBN (Print)9781441995988, 1441995978, 9781441995971
DOIs
Publication statusPublished - 2013 Nov 1

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Park, H. Y., & Nahm, S. (2013). Low temperature sintering of the alkali-niobate ceramics. In Lead-Free Piezoelectrics (pp. 121-137). Springer New York. https://doi.org/10.1007/978-1-4419-9598-8_4