Influence of NaNbO3 on the structural, optical and dielectric properties of 0.05(K0.5Bi0.5TiO3)–0.95(NaNbO3) composites ceramics

Studies on structural, dielectric and optical properties of (Ba0.95Ca0.05)1−x(Ti0.8Sn0.2)1−xNaxNbxO3 lead-free ceramics

“…49 Since the perovskite suffers from allowed direct transition, the value of the index n is assumed to be 1/2. 25 …”

“…33 The band detected at 434 cm À1 is related to asymmetric bending vibration n 4 (Nb-O). 25 However, the intense Raman band of the prepared lead-free ceramics in the 598-606 cm À1 region corresponds to a shoulder in the 551-561 cm À1 region. These bands n 1 are and n 2 are assigned to symmetric and asymmetric stretching modes of the NbO 6 octahedra.…”

“…49 Since the perovskite suffers from allowed direct transition, the value of the index n is assumed to be 1/2. 25 Fig. 9 highlights the plot of (ahn) 2 versus (hn) of all samples.…”

“… 22 NaNbO 3 (NN) is a anti-ferroelectric at room temperature 17 and it transforms to ferroelectric substance, if mixed with a small amount of KNbO 3 , 7 LiNbO 3 , 23 BaSnO 3 , 24 and SrSnO 3 . 25 However, only several studies have been conducted on the ceramics formed BaTiO 3 –NaNbO 3 system with the aim to examine the effect of cation substitution in A and B sites, including significant changes in the dielectric and structural properties.…”

Estudio teórico fundamental comparativo de perovskitas: NaNbO3 y SrTiO3

“…Por otro lado, el Niobato de sodio, tiene una fase ortorrómbica a temperatura ambiente que exhibe propiedades antiferroeléctricas, y en comparación con materiales ferroeléctricos tienen mejores propiedades dieléctricas y pueden almacenar una gran densidad de energía. Es una de las perovskitas más estudiadas en sus diferentes formas de síntesis, por lo que sus propiedades estructurales a través de estudios experimentales son ampliamente comprendidas hasta el momento, aunando las fases que se reportan cambian respecto a unos cuantos grados Kelvin (Mohanty et al, 2019).…”