Dielectric properties of manganese-doped TiO2 with different alkali-free glass contents for energy storage application

Abstract

The dielectric properties and microstructures of 0.05 mol% manganese (Mn)-doped TiO 2 with different alkali-free glass (BaO-B 2 O 3 -Al 2 O 3 -SiO 2 ) contents were investigated. The alkali-free glass which coated Mn-doped TiO 2 ceramic powders was prepared by sol-gel method, all samples were sintered at 1100°C for 6 h. Microstructure observation indicated that the grain size greatly reduced and microstructure uniformity was improved by adding 15 wt% alkali-free glass. The alkali-free glass did not only decrease the dielectric loss (\0.01), but also significantly enhanced the frequency/temperature stability of dielectric properties. The energy density of 15 wt% glass-ceramics could achieve 1.15 J/cc with average breakdown electric field (E b ) of 50.17 kV/mm, the polarization-electric field (P-E) hysteresis loops showed that glass-ceramic composites had a very low energy loss.

Effect of Size on the Structural Transition and Magnetic Properties of Nano-CuFe2O4

“…The different structures of nanoparticle can exhibit special physical and chemical properties. For example, the rutile structure of TiO 2 is used for electronic products because of its high dielectric constant 1 and the anatase for catalysts, 2 while the mixed structure typically displays higher photoactivity than the pure phase. 3 Not only that, the structural transition of nanoparticles plays a key role during the significant process of chemistry.…”

Structure evolution and electric‐field‐induced reversible transition in perovskite Na(Nb1−xTax)O3 ceramics

“…10,11 Compared to linear dielectric and ferroelectric (FE), the dielectric material displaying E-field-induced antiferroelectric ↔ FE (AFE ↔ FE) reversible transitions show huge potential to break through the energy-storage bottleneck of commercial materials. [12][13][14][15][16][17] To date, Pb-based AFEs have been extensively studied. [18][19][20] However, Pb-containing electronic products are being progressively eliminated due to increasingly stringent environmental legislation.…”

“…The energy‐storage density ( W rec ) of a given nonlinear capacitor is estimated by the following expression: $$$$\begin{equation}{W_{{\rm{rec}}}} = \mathop \int \limits_{{P_{\rm{r}}}}^{{P_{\rm{m}}}} EdP\;\end{equation}$$$$where external electric( E )‐field is E , maximum polarization is P m and remanent polarization is P r 10,11 . Compared to linear dielectric and ferroelectric (FE), the dielectric material displaying E ‐field‐induced antiferroelectric ↔ FE (AFE ↔ FE) reversible transitions show huge potential to break through the energy‐storage bottleneck of commercial materials 12–17 . To date, Pb‐based AFEs have been extensively studied 18–20 .…”

Effect of Bi2O3 additive on dielectric properties of BaTiO3-based ceramics for improving energy density

“…The pulse power capacitors are used in many applications, such as laser weapons, high-power microwave systems and other power systems [1][2][3][4][5][6], which need release all the stored energy in microseconds. The key problem is how to achieve high permittivity and high breakdown strength (BDS).…”