Synthesis, Characterization, and Spectroscopic Analysis of Nd_xY_1−xTiNbO₆ Microwave Ceramics

Abstract

Solid solutions of Nd x Y 1Àx TiNbO 6 ceramics were prepared through the solid-state ceramic route. The materials were calcined at 12501C and sintered in the range 1400-15501C. The structure of the system was analyzed using the X-ray diffraction and vibrational spectroscopic analysis. The morphology and the sintering behavior of the samples were analyzed using scanning electron microscopy. The dielectric constant (e r ), temperature coefficient of resonant frequency (t f ), and the unloaded quality factor (Q u ) were measured in the microwave frequency region using the cavity resonator method. The e r and t f increased with an increase in the concentration of Nd in the solid solutions. Nearly zero temperature coefficient of resonant frequency was obtained for the Nd 0.6 Y 0.4 TiNbO 6 ceramic. Samples are of high quality factor and are useful for microwave applications.

Electrical and optical properties of nano-crystalline RE-Ti-Nb-O6 (RE = Dy, Er, Gd, Yb) synthesized through a modified combustion method

“…The symmetric bending vibra- tion gives rise to 5 F 2g at 411 cm −1 . The band at 283 cm −1 is the active mode 6 F 2u and that below 200 cm −1 is due to lattice vibrations [21][22][23].…”