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J.-F. Li, K. Wang, B. P. Zhang and L. M. Zhang, “Ferroelectric and Piezoelectric Properties of Fine-Grained Na0.5K0.5NbO3 Lead-Free Piezoelectric Ceramics Prepared by Spark Plasma Sintering,” Journal of the American Ceramic Society, Vol. 89, No. 2, 2006, pp. 706-709. doi:10.1111/j.1551-2916.2005.00743.x

has been cited by the following article:

• TITLE: Influence of Sintering Temperature on Densification, Structure and Microstructure of Li and Sb Co-Modified (K,Na)NbO3-Based Ceramics

  AUTHORS: Rashmi Rani, Seema Sharma

  KEYWORDS: KNN, Perovskite, XRD, SEM

  JOURNAL NAME: Materials Sciences and Applications, Vol.2 No.10, October 17, 2011

  ABSTRACT: Polycrystalline samples of Lead free (K0.5Na0.5)1-x(Li)x(Sb)x(Nb)1-xO3 ceramics with nominal compositions (x = 0.040 to 0.060) have been prepared by high temperature solid state reaction technique. X-ray diffraction (XRD) pattern shows that the crystal structure transforms from orthorhombic to tetragonal as Li and Sb content increases. Normal sintering process yield compounds with density ~98.2% of the theoretical value. Densification of the Li and Sb co-doped KNN ceramics might be explained by the liquid-phase sintering. This may be attributed to the low melting temperature of Li compounds that appears to promote the formation of a liquid phase during sintering.