4.5 Article

Structures and colossal dielectric behavior of Na1/3Ca1/3La1/3Cu3Ti4O12 ceramics fabricated via a sol-gel process

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Multidisciplinary Sciences

Effects of sintering condition on giant dielectric and nonlinear current-voltage properties of Na1/2Y1/2Cu3Ti3.975Ta0.025O12 ceramics

Pariwat Saengvong et al.

Summary: The effects of sintering conditions on the microstructure, giant dielectric response, and electrical properties of Na1/2Y1/2Cu3Ti3.975Ta0.025O12 (NYCTTaO) were investigated. Single phase and high density ceramics were obtained. Insulating grain boundaries and semiconducting grains were studied using impedance and admittance spectroscopies at different temperatures. A large dielectric constant and low loss tangent were achieved. The mean grain size, ε', and breakdown electric field showed different trends with changing sintering temperature and time. The variations in dielectric response and non-linear electrical properties were primarily attributed to the intrinsic and extrinsic properties of the insulating grain boundaries.

HELIYON (2023)

Article Materials Science, Ceramics

Colossal dielectric properties of Na1/3Ca1/3Sm1/3Cu3Ti4O12 ceramics: Computational and experimental investigations

Jakkree Boonlakhorn et al.

Summary: A modified sol gel technique was used to synthesize a high dielectric ceramic, Na1/3Ca1/3Sm1/3Cu3Ti4O12, with a body-centered cubic (bcc) crystal structure. The ceramic exhibited high dielectric permittivity and low loss tangent. DFT calculations suggested an excess Cu concentration due to substitution of Na ions at Cu sites, leading to the formation of metastable insulating phases.

CERAMICS INTERNATIONAL (2023)

Article Materials Science, Multidisciplinary

Giant dielectric properties of Na1/2La1/2Cu3Ti4O12 perovskite ceramic: First-principles and experimental investigations

Jakkree Boonlakhorn et al.

Summary: Na1/2La1/2Cu3Ti4O12 ceramics were successfully synthesized via sol-gel method. The crystal structure of these ceramics is identical to that of CaCu3Ti4O12. CuO and related Cu phases were observed due to the substitution of Na+ at Cu2+ sites. Oxygen vacancies were created during the sintering process, resulting in a lower oxygen vacancy density at room temperature. The sintered Na1/2La1/2Cu3Ti4O12 ceramics exhibited excellent dielectric properties with a high dielectric permittivity and low dielectric loss tangent. Cu+ and Ti3+ observed in the XPS measurements originated from oxygen vacancies in the Na1/2La1/2Cu3Ti4O12 structure. The internal barrier layer capacitor (IBLC) model was found to be the most appropriate for explaining the colossal dielectric response in these ceramics.

MATERIALS CHEMISTRY AND PHYSICS (2023)

Article Engineering, Electrical & Electronic

Differences between La substitution and doping strategies in dielectric properties of CaCu3Ti4O12 ceramics with low loss

Jianhua Zhang et al.

Summary: This study systematically investigates the influence of La substitution and doping on the phase structure, morphology, and dielectric performances of CCTO ceramics. The results indicate that La substitution has a greater impact on the dielectric properties, leading to higher dielectric constant and breakdown field strength, as well as lower dielectric loss.

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS (2022)

Article Biochemistry & Molecular Biology

Dielectric Properties of Colossal-Dielectric-Constant Na1/2La1/2Cu3Ti4O12 Ceramics Prepared by Spark Plasma Sintering

Hicham Mahfoz Kotb et al.

Summary: In this study, colossal dielectric constant and high dielectric loss were observed in the NLCTO ceramics prepared by mechanochemical synthesis and SPS method. The response of grain and grain boundary contributed to the two relaxation peaks in the electrical modulus spectra.

MOLECULES (2022)

Article Chemistry, Multidisciplinary

Improved microstructure and significantly enhanced dielectric properties of Al3+/Cr3+/Ta5+ triple-doped TiO2 ceramics by Re-balancing charge compensation

Porntip Siriya et al.

Summary: The research shows that the charge compensation mechanism and doping ratio play a significant role in controlling the dielectric properties of (AlxCr0.05-x)Ta0.05Ti0.9O2 ceramics. Triple doping with Al3+ can greatly increase the dielectric permittivity by rebalancing the charge compensation, while maintaining a low loss tangent. The enhanced dielectric properties of the ceramics are primarily attributed to the interfacial polarization at the interface between semiconductor and insulating grains.

RSC ADVANCES (2022)

Article Materials Science, Ceramics

Dielectric properties with high dielectric permittivity and low loss tangent and nonlinear electrical response of sol-gel synthesized Na1/2Sm1/2Cu3Ti4O12 perovskite ceramic

Jakkree Boonlakhorn et al.

Summary: A giant dielectric ceramic material, Na1/2Sm1/2Cu3Ti4O12, was successfully prepared by a modified sol-gel method. It showed a body-centered cubic structure with charge compensation between Na and Sm ions. At a high sintering temperature, it exhibited a large dielectric constant, low dielectric loss tangent, and nonlinear properties originated from the movement of Cu+ and Ti3+ charges.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY (2022)

Article Materials Science, Ceramics

Colossal dielectric response and relaxation behavior in novel system of Zr4+ and Nb5+ co-substituted CaCu3Ti4O12 ceramics

Pu Mao et al.

Summary: This study developed a novel system of isovalent Zr4+ and donor Nb5+ co-doped CaCu3Ti4O12 (CCTO) ceramics to enhance dielectric response. The co-doping of Zr4+ and Nb5+ ions significantly reduced grain size and improved dielectric constant, leading to giant dielectric response within broader frequency and temperature ranges. The enhanced dielectric response is primarily attributed to the complex defect dipoles associated with oxygen vacancies by co-doping Zr4+ and Nb5+ ions into CCTO structure.

CERAMICS INTERNATIONAL (2021)

Article Chemistry, Physical

Simultaneous two-step enhanced permittivity and reduced loss tangent in Mg/Ge-Doped CaCu3Ti4O12 ceramics

Jakkree Boonlakhorn et al.

Summary: The dielectric permittivity of CaCu3Ti4O12 was enhanced by doping with Mg at the Cu site, and further enhanced by codoping with Ge at the Ti site. The enhancement was attributed to the increased ratio of grain size to grain boundary thickness and increased free charge inside semiconducting grains. The double-step reduction in the low-frequency loss tangent was due to the enhanced resistance of the insulating grain boundaries from the segregation of the Cu-rich phase.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

Article Materials Science, Multidisciplinary

Enhanced dielectric properties of Ca0.9Sr0.1Cu3-yZnyTi4-xBxO12 ceramics by modifying grain boundary response

Zunping Xu et al.

Summary: In this study, Ca0.9Sr0.1Cu3-yZnyTi4-xBxO12 ceramics were prepared using the citrate precursor process and sintered at 1100 degrees C for 3 hours. XRD and Raman analysis confirmed that the addition of Zn2+ and B3+ can significantly improve the grain boundary response and dielectric properties of the ceramics.

MATERIALS CHEMISTRY AND PHYSICS (2021)

Article Materials Science, Ceramics

La doped BiFeO3 ceramics synthesized under extreme conditions: Enhanced magnetic and dielectric properties

Roger C. Oliveira et al.

Summary: By utilizing high-energy ball cryomilling, fast firing, and spark plasma sintering procedures, Multiferroic Bi0.85La0.15FeO3 powders and ceramics were successfully synthesized under extreme conditions, showing high density, resistivity, nonlinear response, and enhanced ferroic properties.

CERAMICS INTERNATIONAL (2021)

Article Crystallography

Transport and Dielectric Properties of Mechanosynthesized La2/3Cu3Ti4O12 Ceramics

Mohamad M. Ahmad et al.

Summary: La2/3Cu3Ti4O12 (LCTO) powder was synthesized using the mechanochemical milling technique and sintered at lower temperatures compared to standard solid-state reactions. The sintered ceramics exhibited a cubic phase structure with increasing grain size at higher sintering temperatures. Impedance results indicated higher grain conductivity compared to grain boundary conductivity, contributing to the giant dielectric constant observed in the samples.

CRYSTALS (2021)

Article Chemistry, Physical

Dielectric properties of CaCu3Ti4O12 ceramics doped with aluminium and fluorine

O. Z. Yanchevskii et al.

Summary: The resistances of grain boundary and interface between sample and electrode increase with the combined introduction of Al3+ and F- ions. After 12 hours of sintering, a decrease in dielectric properties was observed due to copper losses. Samples sintered for 10 hours at 1 kHz exhibit specific dielectric parameters.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

Article Physics, Applied

Effects of Lu3+ Doping on Microstructures and Electrical Properties of CaCu3Ti4O12 Ceramics

Renzhong Xue et al.

Summary: The study shows that Lu3+ doping inhibits grain growth of CCTO ceramics, affecting the dielectric constant which decreases first and then increases with Lu3+ content. The presence of Lu3+ increases defect concentrations, leading to different mechanisms contributing to dielectric response at different doping levels. Lu3+ doping also enhances nonlinear electrical properties, associated with cation vacancy defects in the grain boundary region.

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM (2021)

Article Chemistry, Multidisciplinary

Enhanced dielectric properties with a significantly reduced loss tangent in (Mg2+, Al3+) co-doped CaCu3Ti4O12 ceramics: DFT and experimental investigations

Jakkree Boonlakhorn et al.

Summary: The CaCu3Ti4O12 and CaCu2.95Mg0.05Ti3.95Al0.05O12 ceramics were fabricated using a solid-state reaction method, both showing a single-phase of CaCu3Ti4O12. Co-doping with Mg and Al resulted in significant grain size expansion and improved dielectric properties in the ceramics, with high dielectric permittivity and low loss tangent achieved in the CaCu2.95Mg0.05Ti3.95Al0.05O12 ceramic. Experimental and computational results suggest that the enhanced dielectric properties in the co-doped ceramic may be attributed to improved grain boundary responses, particularly from metastable phases and oxygen enrichment at the grain boundaries.

RSC ADVANCES (2021)

Article Materials Science, Multidisciplinary

Improvement in varistor properties of CaCu3Ti4O12 ceramics by chromium addition

Edson Cezar Grzebielucka et al.

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY (2020)

Article Materials Science, Ceramics

Origin of colossal permittivity and low dielectric loss in Na1/3Cd1/3Y1/3Cu3Ti4O12 ceramics

Zhanhui Peng et al.

CERAMICS INTERNATIONAL (2020)

Article Engineering, Electrical & Electronic

Green gelcasting of CaCu3Ti4O12 ceramics

Wei Wan et al.

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS (2020)

Article Materials Science, Ceramics

A new perovskite-related ceramic with colossal permittivity and low dielectric loss

Zhanhui Peng et al.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY (2020)

Article Materials Science, Ceramics

Origin of high dielectric performance in fine grain-sized CaCu3Ti4O12 materials

He Lin et al.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY (2020)

Article Materials Science, Multidisciplinary

Stable high dielectric properties in (Cr, Nb) co-doped SnO2 ceramics

Mohammad Maleki Shahraki et al.

MATERIALS CHEMISTRY AND PHYSICS (2020)

Article Engineering, Electrical & Electronic

Enhanced energy storage efficiency in PVDF based composite films using MnO2nano-fillers

Yang Yu et al.

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS (2020)

Article Chemistry, Physical

Strongly Enhanced Dielectric Response and Structural Investigation of (Sr2+, Ge4+) Co-Doped CCTO Ceramics

Jakkree Boonlakhorn et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2020)

Article Materials Science, Multidisciplinary

Tunable capacitor-varistor response of CaCu3Ti4O12/CaTiO3 ceramic composites with SnO2 addition

G. Cotrim et al.

MATERIALS CHARACTERIZATION (2020)

Article Engineering, Electrical & Electronic

Dielectric, multiferroic and magnetodielectric properties of Co/Fe co-doped Bi4Ti3O12 ceramics

Zhaoxia Yin et al.

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS (2019)

Article Engineering, Electrical & Electronic

High Permittivity, Low Dielectric Loss and Impedance Characteristics of Li0.5La0.5Cu3Ti4O12 Ceramics by a Sol-Gel Technique

Zhanqing Liu et al.

JOURNAL OF ELECTRONIC MATERIALS (2019)

Article Materials Science, Multidisciplinary

Nonlinear current-voltage and giant dielectric properties of Al3+ and Ta5+ co-doped TiO2 ceramics

Wattana Tuichai et al.

MATERIALS RESEARCH BULLETIN (2019)

Article Materials Science, Ceramics

Electronic structure of colossal permittivity (Mg1/3Nb2/3)0.05Ti0.95O2 ceramics

Nateeporn Thongyong et al.

CERAMICS INTERNATIONAL (2018)

Article Engineering, Electrical & Electronic

Dielectric relaxation and relevant mechanism in giant dielectric constant Sm2/3Cu3Ti4O12 ceramics

Lei Ni et al.

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS (2018)

Article Engineering, Electrical & Electronic

Structure and Differentiated Electrical Characteristics of M1/2La1/2Cu3Ti4O12 (M = Li, Na, K) Ceramics Prepared by Sol-Gel Method

Zhanqing Liu et al.

JOURNAL OF ELECTRONIC MATERIALS (2017)

Article Engineering, Electrical & Electronic

Dielectric response mechanism and suppressing high-frequency dielectric loss in Y2O3 grafted CaCu3Ti4O12 ceramics

Feifei Han et al.

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS (2017)

Article Engineering, Electrical & Electronic

Structure, dielectric property and impedance spectroscopy of La2/3Cu3Ti4O12 ceramics by sol-gel method

Zhanqing Liu et al.

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS (2016)

Article Engineering, Electrical & Electronic

Influence of different dopant sites by lanthanum on the dielectric properties of CaCu3Ti4O12 ceramics

Xin Huang et al.

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS (2016)

Article Physics, Applied

Influence of interface point defect on the dielectric properties of Y doped CaCu3Ti4O12 ceramics

Jianming Deng et al.

JOURNAL OF ADVANCED DIELECTRICS (2016)

Article Chemistry, Multidisciplinary

Colossal permittivity and impedance analysis of niobium and aluminum co-doped TiO2 ceramics

Guocai Liu et al.

RSC ADVANCES (2016)

Article Materials Science, Multidisciplinary

Electrical properties of AC3B4O12-type perovskite ceramics with different cation vacancies

Guizhong Li et al.

MATERIALS RESEARCH BULLETIN (2015)

Article Materials Science, Multidisciplinary

Polaron relaxation and non-ohmic behavior in CaCu3Ti4O12 ceramics with different cooling methods

Laijun Liu et al.

MATERIALS CHEMISTRY AND PHYSICS (2013)

Article Chemistry, Physical

Electron-pinned defect-dipoles for high-performance colossal permittivity materials

Wanbiao Hu et al.

NATURE MATERIALS (2013)

Article Materials Science, Ceramics

Very Low Loss Tangent and High Dielectric Permittivity in Pure-CaCu3Ti4O12 Ceramics Prepared by a Modified Sol-Gel Process

Somsack Vangchangyia et al.

JOURNAL OF THE AMERICAN CERAMIC SOCIETY (2012)

Article Materials Science, Multidisciplinary

Dielectric properties and electrical response of grain boundary of Na1/2La1/2Cu3Ti4O12 ceramics

Prasit Thongbai et al.

MATERIALS RESEARCH BULLETIN (2012)

Article Chemistry, Physical

Charge compensation, electrical and dielectric behavior of lanthanum doped CaCu3Ti4O12

Ashutosh Kumar Dubey et al.

JOURNAL OF ALLOYS AND COMPOUNDS (2011)

Article Physics, Applied

Dielectric and nonlinear current-voltage characteristics of rare-earth doped CaCu3Ti4O12 ceramics

Laijun Liu et al.

JOURNAL OF APPLIED PHYSICS (2011)

Article Chemistry, Physical

Electrical properties and microstructural characteristics of nonstoichiometric CaCu3xTi4O12 ceramics

Laijun Liu et al.

JOURNAL OF ALLOYS AND COMPOUNDS (2009)

Article Materials Science, Multidisciplinary

Sol-gel derived CaCu3Ti4O12 ceramics:: Synthesis, characterization and electrical properties

Laijun Liu et al.

MATERIALS RESEARCH BULLETIN (2008)

Article Materials Science, Multidisciplinary

Dc-bias-field-induced dielectric relaxation and ac conduction in CaCu3Ti4O12 ceramics

L. Liu et al.

PHILOSOPHICAL MAGAZINE (2008)

Article Physics, Condensed Matter

Electrical heterogeneity in CaCu3Ti4O12 ceramics fabricated by sol-gel method

Laijun Liu et al.

SOLID STATE COMMUNICATIONS (2007)

Article Chemistry, Inorganic & Nuclear

High dielectric constant in ACu3Ti4O12 and ACu3Ti3FeO12 phases

MA Subramanian et al.

JOURNAL OF SOLID STATE CHEMISTRY (2000)