Microwave dielectric properties of Mg0.95Co0.05TiO3–(Ca0.8Sr0.2)0.6La0.267TiO3 ceramics synthesized by polymeric precursor method

Effect of (Ca0.8Sr0.2)0.6La0.267TiO3 on Phase, Microstructure, and Microwave Dielectric Properties of Mg0.95Zn0.05TiO3 Synthesized by Polymeric Precursor Method

“…A near-zero s f value (i.e., À5.8 ppm/°C) was achieved for the 0.8MZT-0.2CSLT ceramic sintered at 1200°C (Table II). Although the dielectric constant values of these (1 À x)MZT-xCSLT ceramics are comparable to those reported for (1 À y)Mg 0.95 Co 0.05 TiO 3 -y(Ca 0.8 Sr 0.2 ) 0.6 La 0.267 TiO 3 , i.e., (1 À y)MCoT-yCSLT, 20 the Q 9 f values (163,480 GHz to 46,465 GHz for x = 0 to 0.25) of the (1 À x)MZT-xCSLT ceramics achieved in the present study are higher than those (138,766 GHz to 39,180 GHz at y = 0 to 0.25) reported for (1 À y)MCoT-yCSLT. 20 This observed improvement may be due to the fact that the ionic polarizability of Zn (2.04 Å ) is higher than that of Co (1.65 Å ), resulting in stronger atomic vibrations causing a decrease in the dielectric loss.…”

“…19 The DSC profile for the second weight loss appeared split into three peaks (400.4°C, 471.7°C, and 513.8°C), corresponding to combustion of citrate complex and phase formation. Thermal decomposition of citrate complex occurs as follows 20 :…”