Inherent Properties and Phonon Characteristics of BaWO4 Single Phase Ceramic

BaWO 4 ceramic is fabricated by conventional solid‐state reaction technique, and the intrinsic properties and the phonon characteristics of the ceramic are examined. The single‐phase BaWO 4 is found in a tetragonal crystal structure as confirmed by X‐ray diffraction. Scanning electron microscopy shows well‐crystallized grains and uniform grain arrangement with clear boundaries. Raman vibrational modes are assigned, and the atomic motions of the modes are elucidated using first‐principles calculations. The intrinsic properties of the ceramic are evaluated by using the infrared vibrational mode results in a four‐parameter semiquantitative model, and the theoretical values obtained using the model are found to be in good agreement with the measured values. This analysis reveals the dielectric response mechanism of single‐phase BaWO 4 ceramic. The contribution of each vibrational mode to the intrinsic properties is analyzed, and it is found that the E u mode with a frequency of 102.02 cm −1 makes the most important contribution to the dielectric properties.