The tunability in (Ba, Sr)TiO3–Mg2TiO4 system

The Impact of Composite Effect on Dielectric Constant and Tunability in Ferroelectric–Dielectric System

“…and Nenasheva et al., with increasing Mg 2 TiO 4 content in BST‐Mg 2 TiO 4 composite ceramics from 8.3 to 44.4 wt%, the tunability increased. In our recent work, with the increase in Mg 2 TiO 4 from 7.5 to 50 wt%, the tunability of Ba 0.45 Sr 0.55 TiO 3 –Mg 2 TiO 4 and Ba 0.5 Sr 0.5 TiO 3 –Mg 2 TiO 4 under 2 kV/mm increased from 4.3% to 9.7% and from 8% to 14.2%, respectively . This unusual increased tunability can also be observed in the Ba 0.5 Sr 0.5 TiO 3 –Mg 2 SiO 4 –MgO and BST‐MgO system …”

“…In Ba 0.5 Sr 0.5 TiO 3 –Mg 2 TiO 4 system, the tunability at 3 kV/mm decreased from 18.4% to 10.8% with increasing Mg 2 TiO 4 content from 50 to 80 wt% . In our recent work, the tunability of Ba 0.5 Sr 0.5 TiO 3 –Mg 2 TiO 4 system decreased from 14.2% to 12.2% with increasing Mg 2 TiO 4 content from 50 to 65 wt% . In Ba 0.5 Sr 0.5 TiO 3 –MgO, Ba 0.4 Sr 0.6 TiO 3 –Mg 2 TiO 4 and Ba 0.5 Sr 0.5 TiO 3 –Mg 3 B 2 O 6 system, this phenomenon can also be observed …”

“…In the work of Chou et al., the dielectric constant declined from 335 to 35 with rising Mg 2 TiO 4 content from 50 to 80 wt%. In our recent work, the dielectric constant of Ba 0.5 Sr 0.5 TiO 3 –Mg 2 TiO 4 decreased from 1128 to 136 with increasing Mg 2 TiO 4 content from 7.5 to 65 wt% . Moreover, for Ba 0.5 Sr 0.5 TiO 3 –MgO, Ba 0.4 Sr 0.6 TiO 3 –Mg 2 TiO 4, and Ba 0.5 Sr 0.5 TiO 3 –Mg 3 B 2 O 6 composites, the dielectric constant also decreased with more dielectric content …”

“…It should be noticed that, when Mg 2 TiO 4 content exceeds 50 vol%, the tunability decreases rapidly, which was considered to be a percolative property . In the work of Zhang et al., with the increase in linear dielectric content from 60 to 80 vol%, the tunability exhibits the same trend. This phenomenon can be explained by the percolative threshold reported by Jylhä et al .…”

Reply to Comment on “The Impact of Composite Effect on Dielectric Constant and Tunability in Ferroelectric‐Dielectric System”

“…[5][6][7][8][9] However, in the works of Padurariu et al, no increase in tunability was observed even with less dielectric content. 2 With increasing dielectric content from 0 to 60 vol%, the tunability increases from 22.8% to 31.4%. 1.…”