A new, lead free, family of perovskites with a diffuse phase transition: NaNbO 3 -based solid solutions

Crystal Structure and electrical properties of complex perovskite solid solutions based on (1-x) NaNbO3-xBi (Zn0.5Ti0.5) O3

“…The decrease in T max has been observed in other perovskite systems including Ba(Zr x Ti 1-x )O 3, BiScO 3 -Bi(Zn 0.5 Ti 0.5 )O 3 -BaTiO 3 [26] and NaNbO 3 -Bi 0.5 Li 0.5 TiO 3 [18] Figure 4 shows the trend in T max (determined from the maximum permittivity at 10 kHz) as a function of BZT content. According to Raevski and Prosandee, NaNbO 3 -based solid solutions can be divided into two groups [27]. Group I is characterized by a smooth T max (x) dependence and a sharp dielectric maxima (ε m ).…”

Colossal dielectric constant of NaNbO3doped BaTiO3ceramics

“…The development of BaTiO 3 -based high dielectric-constant-materials is necessary for potential applications [5]. Abdelkefi et al [6] presented a detailed report on xNaNbO 3 -BaTiO 3 solid solution (x ranging from 0.025 to 0.8) but there has been rarely reported about the dielectric properties of xNaNbO 3 -BaTiO 3 when x is less than 0.01, in particular the critical concentration of 0.4 mol% to 0.5 mol%.…”

Effect of mechanochemical activation on the synthesis of NaNbO3 and processing of environmentally friendly piezoceramics

“…It is known that NaNbO 3 presents a large number of structural phases, variants of lower symmetry of the ideal perovskite structure, having six phase transitions [4] from the non-polar high temperature phase to the antiferroelectric room temperature phase and the low temperature ferroelectric one. Sodium niobate is of particular interest because in this antiferroelectric phase are based some solid solutions [5][6][7] with good ferroelectric and piezoelectric properties. Recent studies [6,7] are focused on the analysis, involving dielectric and thermal expansion measurements, of the phase transitions in the polar phase of ceramics of Na 1−x Li x NbO 3 compositions.…”