Structural evolution and dielectric properties of (Bi, Mg, Zr)-doped BaTiO3 ceramics for X8R-MLCC application

Stability Study of Dielectric Properties of Plasma-Sprayed BaTiO3

“…Comparing the TCC values in Figures 5 and 6, we see that a strong majority of coatings meets the limit ±15% between 30 °C and 170 °C. Higher temperatures induce destabilization of the dielectric response, similarly as in the case of variously doped bulks [14][15][16]. Concerning the Curie temperature at about 130 °C, there is always the local maximum of TCC, but in the case of annealed coatings, it is much less pronounced.…”

“…The defects, such as vacancies and voids, change the distribution of positive and negative charges at the interface. However, as a result of the grain boundary area decrease, these defects are reduced [15]. The decrease in the ceramic relative permittivity could be attributed to that phenomenon.…”

“…In non-linear materials, such as BaTiO 3 , particularly considering the shifted transformation range [11], we cannot preclude when the largest departure from the room-temperature permittivity is expected. Therefore, the plausible approach is to display TCC over the entire studied range in graphical form [14][15][16] and compare it with the EIA classification limits. As a relevant case for barium titanate, X5R to X9R classes were shown [17], but the studied samples were shown in problems to exhibit the permittivity drift lower than the desirable ±15%, especially in the high-temperature window from 200 to 250 • C.…”

Simultaneous enhancement of dielectric properties and temperature stability in BaTiO3‐based ceramics enabling X8R multilayer ceramic capacitor

“…9,10 Hennings observed diffuse phase transitions near the Curie point and attributed the temperature-stable dielectric characteristics to the coexistence of ferroelectric and paraelectric phases. 11 However, most BaTiO 3 -based X8R ceramics reported recently exhibit a dielectric constant around 1600-2600, [12][13][14][15][16][17][18] resulting in low withstand voltage. Therefore, to enhance the capacitance and withstand the voltage performance of the capacitors, a suitable dielectric with higher dielectric constants should be sought.…”