Structure, morphology, and electrical properties of proton conducting La0.99Sr0.01NbO4-δ synthesized by a modified solid state reaction method

Terbium Substituted Lanthanum Orthoniobate: Electrical and Structural Properties

“…Lanthanum orthoniobate as a proton conductor has been widely investigated since 2006, when Hausgrud and Norby introduced 1 mol% calcium into the lanthanum sublattice as a way of enhancing protonic conductivity [13]. In the following years, multiple dopants have been introduced both into the lanthanum (e.g., by calcium [14], magnesium [15], or strontium [16][17][18][19]) and niobium (e.g., by vanadium [20][21][22], antimony [23][24][25], arsenic [26], or cobalt [27]) sublattices. Recently, we also reported the influence of co-doping, using praseodymium as a rare earth dopant and calcium as an acceptor dopant in the lanthanum sublattice, on these system properties [28].…”

Effect of lithium doping on the structural, conduction mechanism and dielectric property of MnNbO4

“…Therefore, the dielectric dispersion observed in the low-frequency region was attributed to interfacial polarization, since the electronic and atomic polarizations remained unchanged in this frequency range. 76 The experimental data of the dielectric constant ( ε ′) was fitted using the modified Debye function given by the following expression: 77 where t is the average relaxation time, α is a constant, is the dielectric constant at low frequency, and is the dielectric constant at high frequency.…”

A highly efficient UV-to-red-light conversion by LuNbO4:Eu3+ phosphors through exciton-assisted host-activator energy transfer

“…44 The weak absorption peak at 802 cm À1 and the strong absorption band at 542-624 cm À1 were due to the internal vibrations of (NbO 4 ) 3À . 44,45 The positions of all these peaks seemed not to be changed significantly after the addition of Eu 3+ ions to the LNO, confirming the same crystal symmetry of the phosphors and the host. It is noted that no peaks related with C-H, O-H, or H 2 O could be detected (Fig.…”