Journal
JOURNAL OF ADVANCED DIELECTRICS
Volume 7, Issue 5, Pages -Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S2010135X17500308
Keywords
Lead-free piezoelectrics; solid solutions; ion substitutions; phase transitions
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The influence of the B-site ion substitutions in (1 - x)(Bi1/2Na1/2)TiO3-xBaTiO3 system of solid solutions on the relative stability of the antiferroelectric (AFE) and ferroelectric (FE) phases has been studied. The ions of zirconium, tin, and (In0.5Nb0.5), (Fe0.5Nb0.(5)), (Al0.5V0.5) ion complexes have been used as substituting elements. An increase in the concentration of the substituting ion results in a near linear variation in the size of the crystal lattice cell. Along with the cell size variation, a change in the relative stability of the AFE and FE phases takes place according to the changes of the tolerance factor of the solid solution. An increase in the tolerance factor leads to the increase in the temperature of the FE-AFE phase transition, and vice versa. Obtained results indicate the way for raising the temperature of the FE-AFE phase transition in (Bi1/2Na1/2) TiO3-based solid solutions.
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