Intrinsic properties and lattice vibrational characteristics of NiWO4 ceramic

• Published in: Materials chemistry and physics Vol. 251; p. 122861
• Main Authors: Lv, Jiqing, Xiao, En-cai, Liu, Mengting, Dong, Xianlin, Chen, Ying, Yue, Zhenxing, Qi, Ze-ming, Shi, Feng
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.09.2020; Elsevier BV
• Subjects: Damping; Dielectric properties; Diffraction patterns; Far infrared radiation; Infrared reflection; Intrinsic properties; Lattice vibration; Lattice vibrational characteristics; Microwave dielectric ceramics; Nickel compounds; Raman spectra; Spectrum analysis; Tungstates; Wolframite; Wolframite structure; Wolframite structure; Microwave dielectric ceramics; Intrinsic properties; Lattice vibrational characteristics
• ISSN: 0254-0584; 1879-3312
• DOI: 10.1016/j.matchemphys.2020.122861

NiWO4 ceramic was prepared by solid-state synthesis, which was confirmed to be monoclinic wolframite structure (P12/c) by X-ray diffraction pattern. The vibrational modes were identified and illustrated at length by Raman scattering spectroscopy and far-infrared reflection spectroscopy to study the lattice vibrational characteristics. The tested properties are consistent well with the theoretical values obtained by Clausius-Mossotti & damping equations and four-parameter semi-quantum model, and the infrared vibrational mode Bu(263 cm−1) has the greatest contribution to the dielectric properties. •The Raman and IR spectroscopy were used to analyzed the vibrational modes.•The FPSQ model was used to obtain the theoretical dielectric properties.•The vibrational mode Bu(263 cm−1) contributes most to the dielectric properties.