Low dielectric loss and enhanced tunable properties of Mn-doped BST/MgO composites

Preparation and dielectric properties of compositionally graded lead barium zirconate thin films

“…The nonlinear characterization of ε r -E curves could be explained by phenomenological theory proposed by Johnson. Based this theory, in the case of ε r 1, the relationship between dielectric constant and the applied electricfield for perovskite-structure ferroelectric materials in paraelectric state was expressed as follows [17,18]:…”

Dielectric properties of PbTiO3/ZnO ceramic nanocomposites obtained by solid-state reaction method

“…This indicates that an evident chemical reaction occurred between PT and ZnO nanowhiskers. In the case of PZT/ZnO nanocomposites [13], it was shown that ZnO nanowhiskers were chemically inert to PZT at 1100 • C. In this work, ZnO nanowhiskers might act as a sin- tering aid so that samples with high ZnO contents (3.0 and 5.0 wt%) could be sintered at temperatures lower than 1200 • C. The presence of the secondary phase could be attributed to the high sintering temperature and a small degree of lead losses [24]. Moreover, by comparing these results with our previous work [17], it is found that SiC nanofibers are chemically inert to PT at identical sintering conditions.…”

“…In the past few years, additional attempts have been carried out by the addition of oxide particles such as ZrO 2 and MgO [11][12][13]. Moreover, piezoelectric nanocomposites embedded with ZnO whiskers, such as PZT/ZnO composites, have been prepared through a normal sintering process in air.…”

Enhanced dielectric tunability of Ba x Sr1−x TiO3–MgO composite ceramics co-modified with CuO and MnO2

“…Two of them used commonly are: (1) adding nonferroelectric materials such as MgO, MgTiO 3 , Mg 2 SiO 4 and CeO 2 [15][16][17][18][19][20]; (2) doping with different ions such as Mn 4? , Fe 3?…”