Relationships between bond ionicity, lattice energy, bond energy and the microwave dielectric properties of La(Nb1-xTax)O4 (x = 0–0.10) ceramics

Usage of P–V–L bond theory in studying the structural/property regulation of microwave dielectric ceramics: a review

“…202 Substitution of the Nb site using Ta 2 O 5 as a source in LaNbO 4 ceramics presents a similar trend, where the ε r value consistently decreases with bond ionicity, and the increase in structural stability induced by the Ta 5+ cation improves the Q × f value from 47 000 GHz to 66000 GHz. 203 Complex ions, such as (Al 1/3 W 2/3 ) 5+ , (Mg 1/4 W 3/4 ) 5+ , (Zr 1/2 W 1/2 ) 5+ and (AMo) 5+ (A = Mg, Al, Si, Zr) were used to replace the Nb site. For instance, Yang took variations of (Al 1/3 W 2/3 ) 5+ and (Mg 1/4 W 3/4 ) 5+ ionic occupancies into consideration in modified NdNbO 4 systems, 204,205 and the results show that even the cell volume shows different changes.…”

Trace additive enhances microwave dielectric performance significantly to facilitate 5G communications

“…Generally, $${\varepsilon _r}$$ is influenced by both external factors (such as porosity, second phase, and relative density), and internal factors (including dielectric polarizability, lattice vibration, and lattice structure) 28,29 …”

“…Generally, 𝜀 𝑟 is influenced by both external factors (such as porosity, second phase, and relative density), and internal factors (including dielectric polarizability, lattice vibration, and lattice structure). 28,29 Figure 10 displays the relationship between the dielectric constant and relative density. It can be seen that the relative densities of specimens were not all larger than 95%, demonstrating that the influence of relative density cannot be ignored.…”

Bond characteristics and microwave dielectric properties of high‐Q materials in li‐doped Zn3B2O6 systems

“…Generally, a crystal that has higher lattice energy implies weaker lattice vibration and more stable chemical bonds, which lead to a lower intrinsic loss and a higher Q × f value. 30 Figure 7B shows the relationship between U B-O and Q × f values of Zn 3-x Li 2x (BO 3 ) 2 ceramics. The Q × f values have a similar tendency as U B-O for the three phases, which indicates that all of the phases have an influence on the Q × f values.…”