Structures and dielectric properties of a new dielectric material system xMgTiO3–(1−x)MgTa2O6 at microwave frequency

Determining the Quality Factor of Dielectric Ceramic Mixtures with Dielectric Constants in the Microwave Frequency Range

“…Kuang 39 evaluated the quality factor by estimating the materials’ conductivity at microwave frequency. In all these reports, quality factor trends agree with the grain size, phase evolution, porosity, internal strain, and conductivity 5,6,10,27,37–39 . However, precise calculation of the quality factor of mixed ceramic system is still illusive.…”

“…The quality factor change of the ionic substitution is usually attributed to the grain size 20,21,23 , porosity 11,12 , structure 24 , phase evolution 5 , internal strain 2,36–38 , material conductivity 39 and so on. Huang 10 et al . reported that larger grain size corresponds to less grain boundaries per unit volume, which leads to higher quality factor because of periodicity symmetry breaking and less two-dimensional defects.…”

Synthesis of temperature-stable microwave dielectric ceramics NiNb2O6 with TiO2 addition

“…Microwave dielectric ceramics have been widely investigated for use in resonators and filters in satellite and mobile communication systems [1,2]. Columbite niobate compounds MNb 2 O 6 (where M = Mg, Zn, Ni, Ca, Cu, Mn, and Co) have received much attention for applications in microwave dielectric resonators due to their low sintering temperature and low cost [3][4][5][6].…”

Microwave dielectric characteristics of (Mg0.95Ni0.05)TiO3–Ca0.8Sm0.4/3TiO3 ceramic system

“…In fact, the composition route is usually used to adjust the temperature coefficient of resonant frequency ( f ) in dielectric composition study. The formation of multi-phase mixture has made dielectric properties optimization more complicated [1][2][3][4][5][6][7][8][9][10][11][12].…”