Ultrabroad temperature stability of stuffed tridymite-type BaAl2O4 co-doped by [Zn0.5Ti0.5]3+ with weak ferroelectricity

Structural Behavior and Spin-State Features of BaAl2O4 Scaled through Tuned Co3+ Doping

“…As such, their profound influence on optical properties in minerals, − intrinsic electrical conductivity in semiconducting oxides, − charge trapping in microelectronic devices, − and electron–hole recombination centers in photovoltaic or photocatalytic materials − is well-elaborated in the literature. In turn, metal oxide insulators, such as BaAl 2 O 4 , might offer even more desirable properties as they have a wide forbidden band and more complex defect structures when doped with metal cations, implying different charge compensation schemes. ,, A route to the development of innovative phototunable electronic devices with dielectric functionalities was efficiently screened out through dielectric response in Ba­(Al 0.97 Zn 0.03 ) 2 O 4‑δd reported by Nagai et al Many efforts have been made to enhance the performance of BaAl 2 O 4 by metal doping, − and yet a small number of papers have provided a detailed spatial distribution of dopants within the host structure. ,, With its low dielectric constant and dielectric loss and excellent insulation properties, this weak ferroelectric , ceramic is a superior candidate to replace the traditional ferroelectric materials with high dielectric loss and high dielectric constant as multilayer ceramic capacitors (MLCCs). ,− On the other hand, the Co dopant is commonly used as an additive in the fabrication of MLCCs, − whereas the performance and reliability of MLCCs are severely dependent on microstructural parameters (i.e., crystallite size and lattice strain) and doping effects. − …”