Synthesis, characterization, and microwave dielectric properties of ixiolite-structure ZnTiNb2O8 ceramics through the aqueous sol–gel process

Crystal structure, photocatalytic and dielectric property of ATiM2O8 (A: Mg, Zn; M: Nb, Ta)

“…Figure 7 shows the temperature dependence of the dielectric constants and tanδ for ATiM 2 O 8 (A: Mg, Zn; M: Nb, Ta). The dielectric constants for ATiM 2 O 8 (A: Mg, Zn; M: Nb, Ta) were 25~50 and these values were compatible with the published values [15][16][17]. Accordingly, the temperature dependence of dielectric constant for ZnTiNb 2 O 8 shows a weak peak at around 350°C.…”

“…The high temperature synthesis for ZnTiNb 2 O 8 could introduce a small amount of Zn defects because of the volatile nature of Zn atom. Actually there were no reports for this behavior for samples sintered at lower temperature (≤1100°C) [14,15], and these results suggests that lower temperature synthesis such as sol-gel process is suitable for this compound rather than high-temperature solid-state reaction. one, respectively.…”

“…On the other hand, the solid solution systems M 2+ /Ti 4+ /M 5+ /O (M 2+ : Mg, Zn; M 5+ : Nb, Ta), where the transitionmetals were substituted with either magnesium or zinc atom, had been reported to have four types of crystal structures as follows: Mg 0.167 Nb 0.333 Ti 0.5 O 2 with a rutile-type structure [7], (Mg 0.857 Ti 0.143 ) (Nb 0.857 Ti 0.143 ) 2 O 6 , with a columbite-type structure [8], ZnTiNb 2 O 8 with the α-PbO 2 -type structure [9], (Zn 0.15 Nb 0.3 Ti 0.55 )O 2 with a rutile-type structure [10] and Zn/Ti/Ta/O system with a spinel-type structure [11,12]. The dielectric behaviors of ATiM 2 O 8 (A: Mg, Zn; M: Nb, Ta) were reported to be a candidate for a microwave capacitor and sol-gel process or a sintering additive for these compounds was attempted to improve their property [13][14][15][16][17]. However, to the best of our knowledge, there has been no reported investigation on the photocatalytic property for ATiM 2 O 8 (A: Mg, Zn; M: Nb, Ta).…”

Enhanced high dielectric characteristics tri‐layered structural ceramics for 5G/6G communications

“…(The size of the spheres in the diagram represents the value of the dielectric constant; the larger the sphere, the higher the dielectric constant of the dielectric ceramic. ) 4,19–20,33,41,54–85 …”

Preparation and characterization of (Co0:3Zn0:7)(Ti1–xSnx)Nb2O8microwave dielectric ceramics

“…Microwave dielectric ceramics play an important role in mobile communication systems. Specifically, they have been investigated as various components, including duplexers, resonators, antennas, and oscillators [1]. In the form of dielectric resonators, they enable the filter units in the mobile telephone base stations to remove unwanted sidebands and secondary signals, ensuring transmission of high quality primary signals with minimum interference [2].…”