00629nas a2200145 4500008004100000245013700041210006900178260000800247300002100255490000600276100001500282700003200297700002500329856012900354 2015 eng d00aCorrelations between structure, microstructure, density and dielectric properties of the lead-free ferroelectrics Bi0.5(Na,K)0.5TiO30 aCorrelations between structure microstructure density and dielec cNOV a1550028 Page 1-60 v51 aAnjali, K.1 aAjithkumar, Thalasseril, G.1 aJoy, Pattayil, Alias uhttps://library.ncl.res.in/content/correlations-between-structure-microstructure-density-and-dielectric-properties-lead-free02394nas a2200145 4500008004100000245014300041210006900184260000800253490000800261520180200269100001502071700002302086700001602109856012302125 2019 eng d00aRaman and Na-23 solid-state NMR studies on the lead-free ferroelectrics Bi-0.5(Na1-xKx)(0.5)TiO3 in the morphotropic phase boundary region0 aRaman and Na23 solidstate NMR studies on the leadfree ferroelect cOCT0 v1183 a

The local structural changes, due to the substitution of the smaller Na+ by the larger K+ ion, in the lead-free piezoelectric ceramic compositions Bi-0.5(Na1-xKx)(0.5)TiO3 have been studied using Raman and Na-23 solid-state NMR spectroscopy. Different close compositions in the solid solution series Bi-0.5(Na1-xKx)(0.5)TiO3 (0 <= x <= 0.36, Delta x = 0.02) are studied in the morphotropic phase boundary (MPB) region arising from the different crystal structures of the end members Bi0.5Na0.5TiO3 and Bi0.5K0.5TiO3. Close correlations between the Raman and NMR parameters with the performance parameters of the system have been observed, suggesting the role of the local structural changes in determining these parameters. Raman and Na-23 NMR studies showed that the onset of the MPB region is at x = 0.16 and the MPB region corresponds to 0.16 <= x <= 0.24 where better performance parameters are observed.

1 aAnjali, K.1 aAjithkumar, T., G.1 aJoy, P., A. uhttps://library.ncl.res.in/content/raman-and-na-23-solid-state-nmr-studies-lead-free-ferroelectrics-bi-05na1-xkx05tio3