Ionic occupation, structures, and microwave dielectric properties of Y₃MgAl₃SiO₁₂ garnet‐type ceramics

Abstract

The Y 3 MgAl 3 SiO 12 ceramics with pure phase were successfully synthesized by solid-state sintering reaction method for the first time. Their microwave dielectric properties were investigated as a function of sintering temperature. Their microstructure characteristics and ionic occupation sites of tetrahedral and octahedral units were characterized and analyzed by SEM& energy dispersive spectrometer (EDS) and Rietveld refinement of X-ray powder diffraction data. Crystal 1,2 Up to now, many materials with high quality factor (Qf values) to depress energy loss, low dielectric constant (e r ) to reduce the delay time of electronic signal transmission, and ideal near zero temperature coefficient of resonant frequency (s f ) for working frequency stability have been reported and used as resonators, filters, dielectric antennas, dielectric guided wave circuits, and other microwave components. To solve these problems, various kinds of silicate ceramic materials, such as forsterite Mg 2 SiO 4, 5 willemite

Structure, microwave dielectric performance, and infrared reflectivity spectrum of olivine‐type Mg2Ge0.98O4 ceramic

“…It was well consistent with the changes in density. To the best of our knowledge, the permittivity at the microwave frequency regions is mainly determined by ionic polarizability, density, and the secondary phase . According to the XRD patterns, Rietveld refinement, and SEM analysis, the effect of secondary phase could be neglected.…”

“…To the best of our knowledge, the permittivity at the microwave frequency regions is mainly determined by ionic polarizability, density, and the secondary phase. [23][24][25] According to the XRD patterns, Rietveld refinement, and SEM analysis, the effect of secondary phase could be neglected. To investigate the influence of porosity on dielectric constant (ε r ), the following equation is used to amend the relative permittivity 4 :…”

Temperature‐dependent dielectric and Raman spectra and microwave dielectric properties of gehlenite‐type Ca2Al2SiO7 ceramics

“…1,2 With the rapid development of wireless communication from 2G/3G/4G to 5G and beyond (higher frequency band with millimeter wave) techniques, it pushes the explore and development of new microwave dielectric ceramics, which are desired to meet more requirements of properties. 1,2 With the rapid development of wireless communication from 2G/3G/4G to 5G and beyond (higher frequency band with millimeter wave) techniques, it pushes the explore and development of new microwave dielectric ceramics, which are desired to meet more requirements of properties.…”

“…Microwave dielectric ceramics are mainly used in various wireless communication systems such as resonators, filters, antennae, microstrip line, and substrates. 1,2 With the rapid development of wireless communication from 2G/3G/4G to 5G and beyond (higher frequency band with millimeter wave) techniques, it pushes the explore and development of new microwave dielectric ceramics, which are desired to meet more requirements of properties. Microwave dielectric ceramics with both low permittivity (ε r ) and low loss (tanδ) are of great concern due to their low time delay of signal transmission, which are generally used in many 5G high-frequency applications (6-100 GHz) including satellite communications, Internet of things, and self-drive vehicles.…”

Crystal structure, densification, and microwave dielectric properties of Li3Mg2(Nb(1−x)Mox)O6+x/2 (0 ≤ x ≤ 0.08) ceramics

“…With the rapid development of multifunctional communication technology, microwave dielectric ceramics due to excellent performance were widely applied to the integrated devices, such as substrates, dielectric antennae, capacitors, resonators, and filters . A large number of applications required microwave materials with a low permittivity to diminish propagation delay of the signal, a high Q*f to reduce power loss, a near‐zero temperature coefficient to improve thermal stability, and a low sintering temperature to co‐fire with Ag electrode …”