Prospects of Grain Boundary Capacitors
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Abstract. The properties of a commercial grain boundary barrier layer (GBBL) SrTiO 3 -based capacitor are analyzed in terms of capacitance C and resistivity …
Comparison of colossal permittivity of CaCu3Ti4O12 with …
Abstract. The properties of a commercial grain boundary barrier layer (GBBL) SrTiO 3 -based capacitor are analyzed in terms of capacitance C and resistivity …
Equivalent Circuit Model in Grain-Boundary Barrier Layer Capacitors …
A new model is developed to explain the frequency response of the impedance of grain-boundary barrier layer (GBBL) capacitors. This model takes into consideration the dipole polarization effect and provides a simple and effective approach to evaluate the performance of GBBL capacitors with various dopants and sintering in different atmospheres.
A TEM study of grain boundaries in internal boundary layer capacitors …
Donor-doped (Sr, Ca)TiO3 ceramics, either oxidized or infiltrated by Bi2O3 and Bi2O3-PbO molten mixtures, have been studied using a transmission electron microscope equipped with EDX facilities. Grain boundary morphologies of these different materials are investigated. In oxidized samples, grain surfaces exhibit a chemical contrast, interpreted as the result of …
Perspectives and challenges for lead-free energy-storage …
The growing demand for high-power-density electric and electronic systems has encouraged the development of energy-storage capacitors with attributes such as high energy density, high capacitance density, high voltage and frequency, low weight, high-temperature operability, and environmental friendliness. Compared with their …
Ultrahigh-power-density BNT ferroelectric multilayer ceramic …
The ceramics exhibit dense microstructures with uniformly distributed grains and clear grain boundaries, indicating excellent crystallinity. The low sintering temperature of 1080 °C is beneficial for the reduction of grain size and the volatilization …
Optimizing the grain size and grain boundary morphology of …
DOI: 10.1016/J.JMAT.2020.12.009 Corpus ID: 234151481; Optimizing the grain size and grain boundary morphology of (K,Na)NbO3-based ceramics: Paving the way for ultrahigh energy storage capacitors
Comparison of colossal permittivity of CaCu3Ti4O12 with …
The properties of a commercial grain boundary barrier layer (GBBL) SrTiO 3-based capacitor are analyzed in terms of capacitance C and resistivity R of two RC elements, one for grains and one for grain boundaries.Results are compared with those of CaCu 3 Ti 4 O 12 (CCTO) samples showing giant permittivity, measured in the same …
High-energy sodium-ion hybrid capacitors through nanograin-boundary …
DOI: 10.1016/j.jechem.2022.01.017 Corpus ID: 246327854; High-energy sodium-ion hybrid capacitors through nanograin-boundary-induced pseudocapacitance of Co3O4 nanorods @article{Feng2022HighenergySH, title={High-energy sodium-ion hybrid capacitors through nanograin-boundary-induced pseudocapacitance of Co3O4 nanorods}, …
Conduction Properties of Grain Boundary in SrTiO3-Bi2O3 Capacitors
Donor density (Nd=9.5×1024/m3) and energy depth of interfacial state (ΔEi=0.86eV) at vicinities of SrTiO3 ceramics grain boundaries were estimated using Hall coefficient and ICTS, respectively. The voltage of SrTiO3 ceramic grain boundary was analysed by C-V characteristics, Nd and ΔEi on the basis of the structure and …
Unveiling of interstice-occupying dopant segregation at grain ...
@article{An2023UnveilingOI, title={Unveiling of interstice-occupying dopant segregation at grain boundaries in perovskite oxide dielectrics for a new class of ceramic capacitors}, author={Jiawen An and Hae-Seung Lee and Pilgyu Byeon and Dongho Kim and Hyung bin Bae and Siehyung Choi and Jungho Ryu and Sung‐Yoon Chung}, journal={Energy & ...
Electroceramics for High-Energy Density Capacitors: Current …
For energy storage capacitors, impedance is capable of: (i) establishing the contributions to the electrical microstructure (grains, grain boundaries, core–shell structure and electrode–sample interface) and determine their individual conductivity and ε r which give an insight into the distribution of electrical components within the ...
Reverse boundary layer capacitor model in glass/ceramic …
Reverse boundary layer capacitor (RBLC) configuration model, where the grain boundary has a higher electrical conductivity than the grain, is proposed in glass/ceramic composites for dielectric energy storage applications.
A high-permittivity SrTiO3-based grain boundary barrier layer …
A strontium titanate (SrTiO 3)-based grain boundary barrier layer capacitor (GBBLC) dielectric material containing niobium pentoxide (Nb 2 O 5), bismuth …
Equivalent Circuit Model in Grain‐Boundary Barrier Layer Capacitors
Accordingly, the local electric field at the grain boundaries is much higher than the overall electric field. This situation is very similar to the grain boundary layer capacitors [2,39, 40]. As ...
(Open Access) Optimizing the grain size and grain boundary …
Relaxor dielectric ceramic capacitors are very attractive for high-power energy storage. However, the low breakdown strength severely restricts improvements to the energy storage density and practical application. Here, a strategy of designing small grain sizes and abundant amorphous grain boundaries is proposed to improve the energy storage …
Ferroelectric domain switching pathways—From grain boundary to grain …
Grain boundaries (GBs) are one of the main factors influencing the polar domain evolution of polycrystalline ferroelectrics. However, domain switching from GBs to grains remains an unsolved aspect. Previous microscopic GB assumptions hinder such theoretical investigations, assuming that the structure and properties of GB are …
Improved giant dielectric properties of CaCu3Ti4O12 …
A novel concept to simultaneously modify the electric responses of the grain and grain boundaries of CaCu 3 Ti 4 O 12 ceramics was proposed, involving doping with F − anions to improve the giant dielectric properties.
Hole trapping phenomenon at the grain boundary of thin poly-si …
Hole trapping phenomenon at the grain boundary of thin poly-si floating-body MOSFET and Its capacitor-less DRAM application. / Baek, Myung Hyun; Lee, Sang Ho; Kwon, Dae Woong et al. In: Journal of Nanoscience and Nanotechnology, Vol. 17, No. 5, 2017, p. 2986-2990. Research output: Contribution to journal › Article › peer-review
A high-permittivity SrTiO3-based grain boundary barrier layer capacitor …
A strontium titanate (SrTiO 3)-based grain boundary barrier layer capacitor (GBBLC) dielectric material containing niobium pentoxide (Nb 2 O 5), bismuth titania (Bi 2 O 3 ·3TiO 2) and lithium fluoride (LiF) has been produced by a single firing process below 1200 °C s dielectric properties and microstructure show typical values of …
Microstructures of SrTiO3 Internal Boundary Layer Capacitors …
The microstructure of strontium titanate internal boundary layer capacitors at various stages in their processing was studied by transmission electron microscopy of rapidly quenched and normally cooled samples. Compositions containing excess TiO2, Al2O3, and SiO2 have a completely wetting liquid phase at the sintering temperature; during cooling …
Grain-orientation-engineered multilayer ceramic capacitors for …
Here, we propose a strategy to increase the breakdown electric field and thus enhance the energy storage density of polycrystalline ceramics by controlling grain …
Hydrogen-induced degradation in SrTiO3-based grain boundary …
A novel TiN@SrTiO3-based (TiN@STO-based) grain boundary barrier layer capacitor (GBBLC) was proposed to decrease dielectric loss (tgδ) of SrTiO3-based GBBLC at high frequency region through ...
Microstructure of SrTiO3 Boundary‐Layer Capacitor Material
SiTiO3 capacitor material with indiffused Bi2O3 was studied using SEM, ESCA combined with Ar+ ion-etching, and TEM equipped with EDX. The apparent thickness of a second-phase layer observed with SEM was found to be influenced by in-depth effects. ESCA and TEM results show that only a 10- to 100-nm thick layer of second phase is present …
Capacitor dielectric and piezoelectric ceramics
In grain-boundary BL capacitors slow cooling in air or oxygen allows oxygen to diffuse into the grain boundaries and reoxidize thin layers adjacent to the boundaries. Oxidizing agents such as bismuth and copper oxides also can be incorporated into the electrode paste to diffuse along grain boundaries during firing. In either case very high ...
Design strategies of high-performance lead-free electroceramics …
This review briefly discusses the energy storage mechanism and fundamental characteristics of a dielectric capacitor, summarizes and compares the …
Grain boundary behavior in varistor-capacitor
The manipulation of polycrystalline properties by altering the grain boundary character distribution is a promising approach to improve the bulk ceramic properties of materials, which has been utilized in capacitors, varistors, and thermistors, etc. 10–12 Recently, we prepared TiO 2-rich CaCu 3 Ti 4 O 12 (TCCTO) ceramics by a …
Ultrahigh-power-density BNT ferroelectric multilayer …
The ceramics exhibit dense microstructures with uniformly distributed grains and clear grain boundaries, indicating excellent crystallinity. The low sintering temperature of 1080 °C is beneficial for the …
Investigation of Low‐Temperature‐Fired Strontium Titanate
Newly developed low-temperature-flred semiconducting SrTiO 3 ceramics were used to prepare multilayer grain-boundary layer capacitors (MBLCs) based on the conventional manufacturing process for multilayer capacitors (MLCs). The compatibilities of ceramic materials with organic binder and inner electrodes and the effects of preparation methods …
A High-Permittivity SrTiO3-Based Grain Boundary Barrier Layer Capacitor …
A strontium titanate (SrTiO3)-based grain boundary barrier layer capacitor (GBBLC) dielectric material containing niobium pentoxide (Nb2O5), bismuth titania (Bi2O3·3TiO2) and lithium fluoride ...
Synthesis, Microstructure, Dielectric Properties, and Insulation ...
3 grain boundary capac-itors. The aim was to explore an optimal process for semi-conducting and insulating SrTiO 3 grain boundary ceram-ic capacitors. Additionally, this …
Microstructure of SrTiO3 Boundary‐Layer Capacitor Material
A strontium titanate (SrTiO3)-based grain boundary barrier layer capacitor (GBBLC) dielectric material containing niobium pentoxide (Nb2O5), bismuth titania (Bi2O3·3TiO2) and lithium fluoride ...
Internal barrier layer capacitor (IBLC) structure for
Whereas, the specimen C7 sintered at 1000 • C temperature produces more conducting grains and insulating grain boundaries results in inter barrier layer capacitor (IBLC) in CCTO and subtle ...
Grain-orientation-engineered multilayer ceramic capacitors …
Here, we propose grain orientation engineering to greatly reduce the electric-field-induced strain in multilayered capacitors. The basis of this approach is the strong electrostrictive anisotropy ...
Microstructures of SrTiO3 Internal Boundary Layer Capacitors During …
Some of its usages include oxygen-gas sensor [1], grain-boundary barrier layer capacitor [2], epitaxial growth substrate for high temperature superconductor (HTSC) thin films [3], and its use as a ...
[PDF] Reverse boundary layer capacitor model in glass/ceramic ...
Reverse boundary layer capacitor (RBLC) configuration model, where the grain boundary has a higher electrical conductivity than the grain, is proposed in glass/ceramic composites for dielectric energy storage applications. By introducing glass additives as grain boundaries with electrical conductivity higher than ceramic grains, the …
Grain boundary engineering: historical perspective and …
grain boundary engineering for various kinds of structural and functional materials. Future prospects of the grain boundary and interface engineering have been outlined, hoping that a new dimension will emerge pertaining to the discovery of new materials and the generation of a new property originating from the presence of grain boundaries
Ultrahigh energy storage in high-entropy ceramic …
Ultrahigh–power-density multilayer ceramic capacitors (MLCCs) are critical components in electrical and electronic systems. However, the realization of a high energy density combined with a high …
Perspectives and challenges for lead-free energy-storage …
Abstract. The growing demand for high-power-density electric and electronic systems has encouraged the development of energy-storage capacitors with …