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

Rashmi Rani, Seema Sharma
2011 Materials Sciences and Applications  
Polycrystalline samples of Lead free (K 0.5 Na 0.5 ) 1−x (Li) x (Sb) x (Nb) 1−x O 3 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
more » ... N 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.
doi:10.4236/msa.2011.210191 fatcat:is5gfi2wmjhcjecqj7tzhtn4fq