Colossal dielectric behavior and relaxation in Nd-doped BaTiO3 at low temperature

Microstructure, colossal permittivity, and humidity sensitivity of (Na, Nb) co‐doped rutile TiO2 ceramics

“…With the wide application and rapid development in electronics and microelectronics industries, the colossal permittivity (CP) materials have received unprecedented attention . The usual CP materials, such as CaCu 3 Ti 4 O 12 , BaTiO 3 , NiO, and SrTiO 3 , suffer from the formidable shortcomings of either relatively large dielectric loss or bad temperature stability. In 2013, (In + Nb) co‐doped rutile TiO 2 ceramics were found to show excellent dielectric properties free from these shortcomings .…”

High‐temperature dielectric properties and impedance spectroscopy of PbHf1−xSnxO3ceramics

“…The low‐frequency peaks may result from grain boundary and high‐frequency peaks attribute to the contribution of grain. From M ″ plots, there exist a peak in high‐frequency range, indicating a low‐capacitance component contributes to dielectric response [34]. Unfortunately, the peak has not been found in the M ″ data of x = 0.25, which is limited by the measured frequency range.…”

Aging-Resistant Behavior and Room Temperature Electron Spin Resonance of Nd3+ in Singly and Doubly Doped BaTiO3 Ceramics Associated with Preservation History

“…The presence of the peak at 300 cm −1 reveals the pseudo-cubic nature of BN4TC5 containing the ferroelectric phases. In BaTiO 3 ceramics, several bands at ~171, ~186, ~243, ~305, and ~480 cm −1 [E (TO 4 )] are characteristic of low-temperature rhombohedral and orthorhombic phases, and their intensity increases with decreasing temperature [33,34,35]. Four weak bands at 167–172, 187–189, 244–248, and 302–304, and strong peaks at 478–810 cm −1 were observed for the aged BN4T and BN4TC5 powders, which implies that the rhombohedral distortions, which cannot be detected by XRD at RT (Figure 1), exist in these two ceramics preserved over a long period of time.…”