Pyroelectric and dielectric study of NaNbO3 single crystals

Relative phase stability and lattice dynamics of NaNbO3from first-principles calculations

“…For example, using high-resolution neutron scattering, Darlington and Knight [2] have shown that the symmetry of the room temperature phase P should be monoclinic rather than orthorhombic. An additional phase transition at 463K was proposed [3], whereas new phases can be induced by doping or applying an electric field [4][5][6]. Moreover, it was shown that the temperature characteristics of transitions has a crystalline-size dependence [7] ; and a recent study indicates that the FE rhombohedral N phase might coexist with the AFE orthorhombic P phase at low temperatures [1] .…”

Crystallization and optical properties of Nd3+ doped ferroelectric glass-ceramics in the barium sodium niobosilicate system

“…This was in particular of the Na 2 O-BaO-Nb 2 O 5 -SiO 2 system that gave two successive ferroelectric phases, NaNbO 3 and Ba 2 NaNb 5 O 15 after devitrification [1][2][3][4]. Sodium niobate (NaNbO 3 ) is one of the perovskite families that normally show orthorhombic structure with antiferroelectric state at room temperature [5,6]. Meanwhile, barium sodium niobate (Ba 2 NaNb 5 O 15 ) belongs to the ferroelectric crystal family with tungsten bronze (TB) structure [7,8].…”

Effect of Al2O3 addition on the formation of perovskite-type NaNbO3 nanocrystals in silicate-based glasses

“…Sodium niobate, NaNbO 3 , has a perovskite-type structure (Pbma) with an orthorhombic unit cell at room temperature and exhibits anti-ferroelectric properties [4,5]. A small substitution of K + to Na + ion sites in NaNbO 3 produces ferroelectric properties [6][7][8], consequently providing good electro-optic coefficients, piezoelectricity, and electrical-mechanical coupling factors.…”