Li+ enrichment to improve the microwave dielectric properties of Li2ZnTi3O8 ceramics and the relationship between structure and properties

Effect of excess lithium on the structure and microwave dielectric properties of LiMg0.5Ti0.5O2 ceramics

“…Chemical bond theory (P–V–L) and Raman spectroscopy can be used effectively to analyze the influence of intrinsic factors on the dielectric properties 11,47–49 . According to Batsanov, ε r and chemical bond ionicity have the following relationship: $$$$\begin{equation}{\varepsilon _r}\,{\rm{\;}} = \;\,\frac{{{n^2} - 1}}{{1 - {f_i}}} + 1\end{equation}$$$$where n is the refractive index at λ = 589.3 nm 6 . ε r is proportional to bond ionicity ( f i ).…”

“…where n is the refractive index at λ = 589.3 nm. 6 ε r is proportional to bond ionicity (f i ). Here, the relationship between the variation of the intrinsic factors of the main phase and the dielectric properties is analyzed.…”

“…From the point of view of lattice vibrations, a lower full width at half maxima (FWHM) means that a certain class of vibration modes has a lower damping behavior, which leads to a lower intrinsic dielectric loss. 6,11 Figure 7C shows the variation curve of FWHM with x for the Raman characteristic peak located near 756 cm −1 . At x = 0.0375, the minimum value is attained, indicating that the L 0.0375 MTO ceramic has the lowest dielectric loss.…”

“…As a result, the MWDCs will encounter more difficulties as substrate material. [1][2][3][4][5][6] Generally, three key parameters are used to evaluate the dielectric properties of MWDCs [7][8][9][10] : (i) relative permittivity (ε r ). The relationship between ε r and the size of the device is inverse, and MWDCs with high ε r can significantly reduce device size; (ii) dielectric loss (tanδ, also known as quality factor Q × f).…”

“…Electronic devices are gradually moving in direction of high frequency, integration, thinness, and miniaturization as microwave communication technology develop quickly. As a result, the MWDCs will encounter more difficulties as substrate material 1–6 . Generally, three key parameters are used to evaluate the dielectric properties of MWDCs 7–10 : (i) relative permittivity ( ε r ).…”