The influence of the B-site ion substitutions in(1-x)(Bi_(1/2)Na_(1/2))TiO_(3)–xBaTiO_(3)system of solid solutions on the relative stability of the antiferroelectric(AFE)and ferroelectric(FE)phases has been studied.T...The influence of the B-site ion substitutions in(1-x)(Bi_(1/2)Na_(1/2))TiO_(3)–xBaTiO_(3)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(In_(0.5)Nb_(0.5)),(Fe_(0.5)Nb_(0.5)),(Al_(0.5)V_(0.5))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(Bi_(1/2)Na_(1/2))TiO_(3)-based solid solutions.展开更多
The paper presents results of studies of the formation of phases during the solid-state synthesis in the[(Na_(0.5)Bi_(0.5)T_(0.80)Ba_(0.20)]Ti_(1-y)B_(y)TO_(3)system of solid solutions with B-site substitutions.The su...The paper presents results of studies of the formation of phases during the solid-state synthesis in the[(Na_(0.5)Bi_(0.5)T_(0.80)Ba_(0.20)]Ti_(1-y)B_(y)TO_(3)system of solid solutions with B-site substitutions.The substitutions by zirconium,tin and ion complexes(In_(0.5)Nb_(0.5)T and(Fe_(0.5)Nb_(0.5)T have been studied.It has been found that the synthesis is a multi-step process associated with the formation of a number of intermediate phases(depending on the compositions and calcination temperatures).Single-phase solid solutions have been produced at the calcination temperatures in the interval 1000–1100℃.An increase in the substituting ions concentration leads to a linear increase of the crystal cell size.At the same time,the tolerance factor gets reduced boosting the stability of the antiferroelectric phase as compared to that of the ferroelectric phase.展开更多
文摘The influence of the B-site ion substitutions in(1-x)(Bi_(1/2)Na_(1/2))TiO_(3)–xBaTiO_(3)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(In_(0.5)Nb_(0.5)),(Fe_(0.5)Nb_(0.5)),(Al_(0.5)V_(0.5))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(Bi_(1/2)Na_(1/2))TiO_(3)-based solid solutions.
文摘The paper presents results of studies of the formation of phases during the solid-state synthesis in the[(Na_(0.5)Bi_(0.5)T_(0.80)Ba_(0.20)]Ti_(1-y)B_(y)TO_(3)system of solid solutions with B-site substitutions.The substitutions by zirconium,tin and ion complexes(In_(0.5)Nb_(0.5)T and(Fe_(0.5)Nb_(0.5)T have been studied.It has been found that the synthesis is a multi-step process associated with the formation of a number of intermediate phases(depending on the compositions and calcination temperatures).Single-phase solid solutions have been produced at the calcination temperatures in the interval 1000–1100℃.An increase in the substituting ions concentration leads to a linear increase of the crystal cell size.At the same time,the tolerance factor gets reduced boosting the stability of the antiferroelectric phase as compared to that of the ferroelectric phase.
