Preparation and microwave dielectric properties of pure and doped magnesium titanate ceramics
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Enhanced quality factor (∼336,800 GHz) of MgTiO<inf>3</inf> ceramic by Hf substitution for Ti-site
2024, Ceramics InternationalEffect of Co substitution on the structural, dielectric and reflection properties of MgTiO<inf>3</inf> solid solutions
2023, Materials Research BulletinCitation Excerpt :A few studies have been published on enhancing the dielectric properties of MgTiO3 ceramics by partially substituting Mg2+ ions with Zn2+, Co2+, or Ni2+ ions. For example, Mg0.95Zn0.05TiO3 (ɛr ∼ 17.1, Qf ∼ 264 THz, τf ∼ 40.3 ppm/°C) [20,21], Mg0.95Co0.05TiO3 (ɛr ∼ 16.8, Qf ∼ 244 THz, τf ∼ 54 ppm/°C) [5,22,23], and Mg0.95Ni0.05TiO3 (ɛr ∼ 17.2, Qf ∼ 180 THz, τf ∼ 45 ppm/°C) [20,24] have been studied. These compositions were sintered at temperatures greater than 1400°C.
Microwave hybrid sintering of 0.95(Mg<inf>0.95</inf>Zn<inf>0.05</inf>)TiO<inf>3</inf>-0.05CaTiO<inf>3</inf> ceramics and its microwave dielectric properties
2022, Journal of the European Ceramic SocietyCitation Excerpt :It is well-known that medium and high εr values promote miniaturization, while low εr values combined with low loss (high Qu) are useful for substrates and antenna applications in microwave and millimeter bands[5–7]. MgTiO3[8–12](MT) and Mg2TiO4[7,13](M2T) have been reported as potential candidates for microwave applications in MgO-TiO2 binary system. Since both of these ceramics have large negative τf (~−50 ppm/°C), for practical applications like multilayer chip capacitors and patch antennas, they are reinforced with CaTiO3(CT) or SrTiO3(ST) to get near-zero τf.
Structural, electrical properties and stability in microwave dielectric properties of (1−x) MgTiO<inf>3</inf>-x SrTiO<inf>3</inf> composite ceramics
2021, Journal of Alloys and CompoundsStructural dependence of microwave dielectric properties in ilmenite-type Mg(Ti<inf>1-x</inf>Nb<inf>x</inf>)O<inf>3</inf> solid solutions by Rietveld refinement and Raman spectra
2021, Ceramics InternationalCitation Excerpt :Many scholars have attempted different element doping to improve the performance of MgTiO3 by doping Zn, Ta and other elements to enhance the dielectric properties of the material by replacing the A-site Mg2+ [13]. Ferreira et al. [14–16] studied the effects of Cr, Fe, Co, La, Ni, Nb and other elements on the microstructure and microwave dielectric properties of MgTiO3 ceramics under different heat treatment conditions. They found that the introduction of Fe and La ions inhibited the growth of grains, whilst that of Cr and Co ions promoted such growth.
Studies of structural, electrical and optical properties of MgNb<inf>2</inf>O<inf>6</inf>-Mg<inf>4</inf>Nb<inf>2</inf>O<inf>9</inf>nanocomposite for possible opto-electronic applications
2021, Materials Today: ProceedingsCitation Excerpt :MgNb2O6 (MN2) and Mg4Nb2O9 (M4N2) ceramics are extensively investigated due to their interesting dielectric properties. MgNb2O6 (magnesium niobate) belongs to the family of metal niobate ceramics and exhibits good dielectric properties at microwave frequencies [1–3]. Due to lesser dielectric loss and a higher dielectric constant, it is commonly used in microwave devices.