Microwave dielectric properties of low-fired Li2Mg3TiO6 nanocrystalline ceramics derived from ultrafine particles

Grain size engineered 0.95MgTiO3–0.05CaTiO3 ceramics with excellent microwave dielectric properties and prominent mechanical performance

“…High-energy ball milling (HEBM), in which raw materials are mechanically ground into nanopowders to increase their sintering kinetics, is another effective way to lower the sintering temperature. [10][11][12] More importantly, the HEBM method is suitable for industrial production.…”

“…29,30 The physics of resin under pressure is similar to the seepage pr lar approaches have been used also to mod into a mold containing fiber mats. 23,[31][32][33][34][35][36][37][38] T in these cases to determine the resin flow ing times corresponding to different infilt Preceramic polycarbosilane polymers as precursors to make ceramic fibers 10,3 trix. [7][8][9]40,41 The chemical and volume ch pany ceramization of the polymer during documented in several studies.…”

“…The microwave dielectric properties of dielectric ceramics are also significantly affected by the additives because of their complicated reaction with the host material. High‐energy ball milling (HEBM), in which raw materials are mechanically ground into nanopowders to increase their sintering kinetics, is another effective way to lower the sintering temperature 10–12 . More importantly, the HEBM method is suitable for industrial production.…”

“…For instance, Roopas Kiran et al 16 concluded that a longer sintering duration is beneficial for grain size increase and favorable in reducing the microwave dielectric loss of Zn 0.7 Mg 0.3 TiO 3 . Ma et al 10 synthesized Li 2 Mg 3 TiO 6 ‐based ceramics with an average grain size increasing from 200 to 1000 nm and a Q × f value increasing from 20 100 to 106 170 GHz. Conversely, Breeze et al 17 proved that grain boundaries have a negligible influence on the microwave dielectric loss in single crystal and bi‐crystal MgO and explained that grain boundaries act as a sink to absorb impurities and defects, which significantly lower the Q × f value.…”

“…Preceramic polycarbosilane polymers are commonly used as precursors to make ceramic fibers 10,39 and ceramic matrix. [7][8][9]40,41 The chemical and volume changes that accompany ceramization of the polymer during pyrolysis have been documented in several studies.…”