Microstructures and dielectric properties of (1−x)SrTiO3–xCa0.61Nd0.26TiO3 ceramic system at microwave frequencies

Effects of structural characteristics on microwave dielectric properties of (Sr0.2Ca0.488Nd0.208)Ti1−xGa4x/3O3 ceramics

“…1 illustrates the room-temperature XRD patterns of the SCNTGx (0.2 x 0.6) ceramics sintered at 1350 C for 4 h. It is clear that a single phase with orthorhombic perovskite, belonging to the space group Pnma (62), is obtained in the range of 0.2 x 0.4. This result is similar to our previous reports on (Sr 0.2 Ca 0.488 Nd 0.208 )TiO 3 ceramics without Ga doped [12]. It can be seen from Fig.…”

“…4, Q Â f $9500 GHz and t f $ +332.5 ppm/ C can be achieved for specimens using (Sr 0.2 Ca 0.488 Nd 0.208 )TiO 3 ceramics after sintering at 1400 C for 4 h [12]. The replacing of slight Sr 2+ for Ca 2+ and Nd 3+ on the A-site develops a novel microwave dielectric material with a good microwave dielectric properties.…”

Synthesis and Dielectric Characterization of Nd Doped SrTiO₃ Ceramics for Energy Storage Applications

“…The slurry was then kept in a hot air oven to expel the water content. Subsequently, calcination of the powders was done in multiple steps, by selecting a final calcination temperature of 1200 o C [16].…”

Sintering behaviour and microwave dielectric properties of a new complex perovskite: (1 − x)(Sr0.3Ca0.427Nd0.182)TiO3−x SmAlO3 ceramics

“…It is well known that an effective way to achieve near-zero τ f is to mix two compounds, one with a positive τ f and the other with a negative τ f , to form a solid solution or composite. In our previous work [16], the (Sr 0.3 Ca 0.427 Nd 0.182 )TiO 3 specimen sintered at 1400 • C for 4 h showed a very high * Author for correspondence (liufeiguet@163.com) ε r ∼ 145 and moderate Qf value ∼7900 GHz. In addition, a relatively low positive τ f ∼ 415.6 ppm • C −1 , compared with that of SrTiO 3 and/or CaTiO 3 [3,7], can also be obtained for this sample.…”

“…In the figure, the Qf value shows a monotonic increase with a rise of SmAlO 3 content. This can be explained by the fact that the SCNT ceramics possess lower Qf value (∼7900 GHz) [16] than that of SA ceramics (∼65000 GHz) [17], which leads to increasing Qf value of SCNT-SAx ceramics with increasing x-value. Moreover, in general, Qf value of the specimens is also dependent on secondary phase, grain size and density [23,24].…”