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Saha P, Nithya R, Sarguna RM, Sen S. Optical and dielectric properties of divalent copper based double perovskite compound, Gd 2CuTiO 6. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:275702. [PMID: 38537279 DOI: 10.1088/1361-648x/ad3874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 03/27/2024] [Indexed: 04/06/2024]
Abstract
In this work, we have investigated high temperature dielectric properties and room temperature optical properties on rare earth ion based orthorhombic Gd2CuTiO6(GCTO). Optical properties like reflectance and band gap were determined from ultra-violet visible (UV-Vis) diffuse reflectance spectroscopy technique and photoluminescence (PL) spectrum. The compound exhibited substantial optical absorption and emission in the visible region. Our findings reveal the presence of an intermediate band, as evidenced by the difference between the band gap values obtained from the Tauc plot using the diffuse reflectance spectrum (3.07 eV) and the PL spectrum (2.4 eV). Furthermore, thermogravimetric analysis demonstrated high thermal stability with <0.4% change in mass over a wide temperature range of 30 °C-1200 °C in air environment. Moreover, lead-halide free compound, GCTO is highly thermally stable oxide double perovskite with wide band gap and absorption in the UV-Vis range are highly suitable for optical applications In addition, dielectric properties of the compound have been examined using impedance spectroscopy as a function of frequency ranging from 500 Hz to 1 MHz and temperature between 300 K and 550 K. Compounds with relaxor behaviour at high temperatures and high thermal stability are desired for several applications. Because of the cation disorders present in this compound, GCTO displays dielectric relaxor behaviour indicative of a distribution of relaxation times. Furthermore, the frequency-dependent modulus illustrated a thermally activated conduction mechanism. Cole-Cole plots of electrical modulus suggest prominent grain contribution above 350 K.
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Affiliation(s)
- Papiya Saha
- Materials Science Group, Indira Gandhi Centre for Atomic Research, A CI of Homi Bhabha National Institute, Kalpakkam 603102, Tamil Nadu, India
| | - R Nithya
- Materials Science Group, Indira Gandhi Centre for Atomic Research, A CI of Homi Bhabha National Institute, Kalpakkam 603102, Tamil Nadu, India
| | - R M Sarguna
- Materials Science Group, Indira Gandhi Centre for Atomic Research, A CI of Homi Bhabha National Institute, Kalpakkam 603102, Tamil Nadu, India
| | - Sujoy Sen
- Materials Science Group, Indira Gandhi Centre for Atomic Research, A CI of Homi Bhabha National Institute, Kalpakkam 603102, Tamil Nadu, India
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Yang G, Peng Z, Liu H, Wu D, Liang P, Wei L, Chao X, Yang Z. Giant dielectric response and relaxation behavior of Bi 3+/W 6+ co-doped TiO 2 ceramics. Phys Chem Chem Phys 2024; 26:8834-8841. [PMID: 38426247 DOI: 10.1039/d3cp06154j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
With the rapid development of electronic information technology, dielectric ceramics are widely used in the field of passive devices such as multi-layer ceramic capacitors. In this paper, (Bi2/3W1/3)xTi1-xO2 (BWTOx) ceramics with superior dielectric properties have been prepared by using a traditional solid-state method. Remarkably, at a (Bi2/3W1/3)4+ doping level of 0.01, a (Bi2/3W1/3)0.01Ti0.99O2 ceramic achieved a giant dielectric permittivity of ∼1.5 × 104 and a low loss tangent of ∼0.07 at 1 kHz, as well as a good temperature independence, which could satisfy the operating temperature standards for X9R capacitors. The abnormal dielectric relaxation in the low temperature region can be explained by the interface polarization. Data based on the complex impedance spectroscopy and X-ray photoemission spectroscopy results indicate that the colossal permittivity of BWTOx ceramics is mainly ascribed to the internal barrier layer capacitance effect. The findings of this work could provide valuable insights for achieving large dielectric constants and good temperature stability simultaneously in BWTOx and other related electronic ceramic materials.
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Affiliation(s)
- Guoyan Yang
- Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China.
| | - Zhanhui Peng
- Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China.
| | - Huan Liu
- Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China.
| | - Di Wu
- Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China.
| | - Pengfei Liang
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
| | - Linling Wei
- School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
| | - Xiaolian Chao
- Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China.
| | - Zupei Yang
- Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China.
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Srilarueang S, Putasaeng B, Sreejivungsa K, Thanamoon N, Thongbai P. Giant dielectric response, nonlinear characteristics, and humidity sensing properties of a novel perovskite: Na 1/3Sr 1/3Tb 1/3Cu 3Ti 4O 12. RSC Adv 2023; 13:29706-29720. [PMID: 37822654 PMCID: PMC10563176 DOI: 10.1039/d3ra06162k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Accepted: 10/04/2023] [Indexed: 10/13/2023] Open
Abstract
In this study, we unveil a novel perovskite compound, Na1/3Sr1/3Tb1/3Cu3Ti4O12, synthesized through a solid-state reaction method, exhibiting remarkable giant dielectric response, nonlinear characteristics, and humidity sensing capabilities. This research highlights the emergence of a Cu-rich phase, the properties of which undergo significant alterations depending on the sintering conditions. The optimization of sintering parameters, encompassing a temperature range of 1040-1450 °C for 1-8 h, resulted in substantial dielectric permittivity (ε') values (∼2800-6000). The temperature dependence of ε' demonstrated relationship to the particular sintering conditions utilized. The acquired loss tangent values were situated within encouraging values, ranging from 0.06 to 0.16 at 1 kHz. Furthermore, the material revealed distinct nonlinear electrical characteristics at 25 °C, with the nonlinear coefficient values of 5-127, depending on ceramic microstructures. Additionally, we delved deeply into the humidity-sensing properties of the Na1/3Sr1/3Tb1/3Cu3Ti4O12 material, showing a considerable variation in ε' in response to fluctuations in relative humidity, thereby indicating its prospective application in humidity sensing technologies. The hysteresis error and response/recovery times were calculated, highlighting the versatility of this compound and its promising potential across multiple applications. The Na1/3Sr1/3Tb1/3Cu3Ti4O12 not only shows remarkable giant dielectric responses but also portrays significant promise for nonlinear and humidity sensing applications, marking it as a significant participant in the advancement of perovskite-based functional materials.
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Affiliation(s)
- Sirion Srilarueang
- Department of Physics, Giant Dielectric and Computational Design Research Group (GD-CDR), Faculty of Science, Khon Kaen University Khon Kaen 40002 Thailand
| | - Bundit Putasaeng
- National Metal and Materials Technology Center 114 Thailand Science Park, Paholyothin Road, Klong 1, Khlong Luang Pathumthani 12120 Thailand
| | - Kaniknun Sreejivungsa
- Department of Physics, Giant Dielectric and Computational Design Research Group (GD-CDR), Faculty of Science, Khon Kaen University Khon Kaen 40002 Thailand
- Institute of Nanomaterials Research and Innovation for Energy (IN-RIE), Khon Kaen University Khon Kaen 40002 Thailand
| | - Noppakorn Thanamoon
- Department of Physics, Giant Dielectric and Computational Design Research Group (GD-CDR), Faculty of Science, Khon Kaen University Khon Kaen 40002 Thailand
- National Metal and Materials Technology Center 114 Thailand Science Park, Paholyothin Road, Klong 1, Khlong Luang Pathumthani 12120 Thailand
| | - Prasit Thongbai
- Department of Physics, Giant Dielectric and Computational Design Research Group (GD-CDR), Faculty of Science, Khon Kaen University Khon Kaen 40002 Thailand
- Institute of Nanomaterials Research and Innovation for Energy (IN-RIE), Khon Kaen University Khon Kaen 40002 Thailand
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Plutenko T, V’yunov O, Fedorchuk O, Khomenko B, Belous A. Sol-gel synthesis, structure, and dielectric properties of La 0.67Li xTi 1-xAl xO 3 solid solutions. Heliyon 2023; 9:e15392. [PMID: 37123893 PMCID: PMC10130868 DOI: 10.1016/j.heliyon.2023.e15392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 04/04/2023] [Accepted: 04/05/2023] [Indexed: 05/02/2023] Open
Abstract
La0.67LixTi1-xAlxO3 were synthesized using the sol-gel Pechini route. Ceramic samples were sintered in the temperature range of 1240-1300 °C in the air atmosphere. It was found that in the concentration range of 0.05 ≤ x < 0.15 there is a morphotropic phase boundary region with rhombohedral and tetragonal syngonies. In the concentration range of 0.15 ≤ x ≤ 0.3, a single-phase solid solution with rhombohedral R 3 ‾ c syngony is formed. As the value of x increases, the average grain size of La0.67LixTi1-xAlxO3 ceramics increases from 5.23 μm (x = 0.05) to 8.76 μm (x = 0.3). All materials of the La0.67LixTi1-xAlxO3 system at 0.05 ≤ x ≤ 0.3 have colossal values of dielectric constant ε' > 104 at frequencies up to 1 kHz. La0.67LixTi1-xAlxO3 (x = 0.2) solid solution with rhombohedral syngony has the highest value of dielectric constant and the lowest value of the dielectric losses.
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Praxedes F, Moreno H, Simões A, Teixeira V, Nunes R, Amoresi R, Ramirez M. Interface matters: Design of an efficient CaCu3Ti4O12-rGO photocatalyst. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.117478] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Saengvong P, Chanlek N, Putasaeng B, Pengpad A, Harnchana V, Krongsuk S, Srepusharawoot P, Thongbai P. Significantly Improved Colossal Dielectric Properties and Maxwell-Wagner Relaxation of TiO 2-Rich Na 1/2Y 1/2Cu 3Ti 4+xO 12 Ceramics. Molecules 2021; 26:6043. [PMID: 34641587 PMCID: PMC8512015 DOI: 10.3390/molecules26196043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 09/26/2021] [Accepted: 09/30/2021] [Indexed: 11/23/2022] Open
Abstract
In this work, the colossal dielectric properties and Maxwell-Wagner relaxation of TiO2-rich Na1/2Y1/2Cu3Ti4+xO12 (x = 0-0.2) ceramics prepared by a solid-state reaction method are investigated. A single phase of Na1/2Y1/2Cu3Ti4O12 is achieved without the detection of any impurity phase. The highly dense microstructure is obtained, and the mean grain size is significantly reduced by a factor of 10 by increasing Ti molar ratio, resulting in an increased grain boundary density and hence grain boundary resistance (Rgb). The colossal permittivities of ε' ~ 0.7-1.4 × 104 with slightly dependent on frequency in the frequency range of 102-106 Hz are obtained in the TiO2-rich Na1/2Y1/2Cu3Ti4+xO12 ceramics, while the dielectric loss tangent is reduced to tanδ ~ 0.016-0.020 at 1 kHz due to the increased Rgb. The semiconducting grain resistance (Rg) of the Na1/2Y1/2Cu3Ti4+xO12 ceramics increases with increasing x, corresponding to the decrease in Cu+/Cu2+ ratio. The nonlinear electrical properties of the TiO2-rich Na1/2Y1/2Cu3Ti4+xO12 ceramics can also be improved. The colossal dielectric and nonlinear electrical properties of the TiO2-rich Na1/2Y1/2Cu3Ti4+xO12 ceramics are explained by the Maxwell-Wagner relaxation model based on the formation of the Schottky barrier at the grain boundary.
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Affiliation(s)
- Pariwat Saengvong
- Giant Dielectric and Computational Design Research Group (GD–CDR), Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand; (P.S.); (A.P.); (V.H.); (S.K.); (P.S.)
| | - Narong Chanlek
- Synchrotron Light Research Institute (Public Organization), 111 University Avenue, Muang District, Nakhon Ratchasima 30000, Thailand;
| | - Bundit Putasaeng
- National Metal and Materials Technology Center, National Science and Technology Development Agency, Thailand Science Park, Pathum Thani 12120, Thailand;
| | - Atip Pengpad
- Giant Dielectric and Computational Design Research Group (GD–CDR), Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand; (P.S.); (A.P.); (V.H.); (S.K.); (P.S.)
- Institute of Nanomaterials Research and Innovation for Energy (IN–RIE), Khon Kaen University, Khon Kaen 40002, Thailand
| | - Viyada Harnchana
- Giant Dielectric and Computational Design Research Group (GD–CDR), Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand; (P.S.); (A.P.); (V.H.); (S.K.); (P.S.)
- Institute of Nanomaterials Research and Innovation for Energy (IN–RIE), Khon Kaen University, Khon Kaen 40002, Thailand
| | - Sriprajak Krongsuk
- Giant Dielectric and Computational Design Research Group (GD–CDR), Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand; (P.S.); (A.P.); (V.H.); (S.K.); (P.S.)
- Institute of Nanomaterials Research and Innovation for Energy (IN–RIE), Khon Kaen University, Khon Kaen 40002, Thailand
| | - Pornjuk Srepusharawoot
- Giant Dielectric and Computational Design Research Group (GD–CDR), Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand; (P.S.); (A.P.); (V.H.); (S.K.); (P.S.)
- Institute of Nanomaterials Research and Innovation for Energy (IN–RIE), Khon Kaen University, Khon Kaen 40002, Thailand
| | - Prasit Thongbai
- Giant Dielectric and Computational Design Research Group (GD–CDR), Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand; (P.S.); (A.P.); (V.H.); (S.K.); (P.S.)
- Institute of Nanomaterials Research and Innovation for Energy (IN–RIE), Khon Kaen University, Khon Kaen 40002, Thailand
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The Primary Origin of Excellent Dielectric Properties of (Co, Nb) Co-Doped TiO 2 Ceramics: Electron-Pinned Defect Dipoles vs. Internal Barrier Layer Capacitor Effect. Molecules 2021; 26:molecules26113230. [PMID: 34072170 PMCID: PMC8198226 DOI: 10.3390/molecules26113230] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 05/23/2021] [Accepted: 05/25/2021] [Indexed: 11/16/2022] Open
Abstract
(Co, Nb) co-doped rutile TiO2 (CoNTO) nanoparticles with low dopant concentrations were prepared using a wet chemistry method. A pure rutile TiO2 phase with a dense microstructure and homogeneous dispersion of the dopants was obtained. By co-doping rutile TiO2 with 0.5 at.% (Co, Nb), a very high dielectric permittivity of ε′ ≈ 36,105 and a low loss tangent of tanδ ≈ 0.04 were achieved. The sample–electrode contact and resistive outer-surface layer (surface barrier layer capacitor) have a significant impact on the dielectric response in the CoNTO ceramics. The density functional theory calculation shows that the 2Co atoms are located near the oxygen vacancy, creating a triangle-shaped 2CoVoTi complex defect. On the other hand, the substitution of TiO2 with Nb atoms can form a diamond-shaped 2Nb2Ti complex defect. These two types of complex defects are far away from each other. Therefore, the electron-pinned defect dipoles cannot be considered the primary origins of the dielectric response in the CoNTO ceramics. Impedance spectroscopy shows that the CoNTO ceramics are electrically heterogeneous, comprised of insulating and semiconducting regions. Thus, the dielectric properties of the CoNTO ceramics are attributed to the interfacial polarization at the internal insulating layers with very high resistivity, giving rise to a low loss tangent.
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Boonlakhorn J, Prachamon J, Manyam J, Krongsuk S, Thongbai P, Srepusharawoot P. Colossal dielectric permittivity, reduced loss tangent and the microstructure of Ca 1-x Cd x Cu 3Ti 4O 12-2y F 2y ceramics. RSC Adv 2021; 11:16396-16403. [PMID: 35479167 PMCID: PMC9029990 DOI: 10.1039/d1ra02707g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 04/28/2021] [Indexed: 11/21/2022] Open
Abstract
Ca1−xCdxCu3Ti4O12−2yF2y (x = y = 0, 0.10, and 0.15) ceramics were successfully prepared via a conventional solid-state reaction (SSR) method. A single-phase CaCu3Ti4O12 with a unit cell ∼7.393 Å was detected in all of the studied ceramic samples. The grain sizes of sintered Ca1−xCdxCu3Ti4O12−2yF2y ceramics were significantly enlarged with increasing dopant levels. Liquid-phase sintering mechanisms could be well matched to explain the enlarged grain size in the doped ceramics. Interestingly, preserved high dielectric permittivities, ∼36 279–38 947, and significantly reduced loss tangents, ∼0.024–0.033, were achieved in CdF2 codoped CCTO ceramics. Density functional theory results disclosed that the Cu site is the most preferable location for the Cd dopant. Moreover, F atoms preferentially remained close to the Cd atoms in this structure. An enhanced grain boundary response might be a primary cause of the improved dielectric properties in Ca1−xCdxCu3Ti4O12−2yF2y ceramics. The internal barrier layer capacitor model could well describe the colossal dielectric response of all studied sintered ceramics. CdF2 defect clusters result in enhancement of dielectric properties of the Ca1−xCdxCu3Ti4O12−2yF2y ceramics.![]()
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Affiliation(s)
- Jakkree Boonlakhorn
- Giant Dielectric and Computational Design Research Group (GD-CDR), Department of Physics, Faculty of Science, Khon Kaen University Khon Kaen 40002 Thailand
| | - Jirata Prachamon
- Giant Dielectric and Computational Design Research Group (GD-CDR), Department of Physics, Faculty of Science, Khon Kaen University Khon Kaen 40002 Thailand
| | - Jedsada Manyam
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA) Pathum Thani 12120 Thailand
| | - Sriprajak Krongsuk
- Giant Dielectric and Computational Design Research Group (GD-CDR), Department of Physics, Faculty of Science, Khon Kaen University Khon Kaen 40002 Thailand .,Institute of Nanomaterials Research and Innovation for Energy (IN-RIE), NANOTEC-KKU RNN on Nanomaterials Research and Innovation for Energy, Khon Kaen University Khon Kaen 40002 Thailand
| | - Prasit Thongbai
- Giant Dielectric and Computational Design Research Group (GD-CDR), Department of Physics, Faculty of Science, Khon Kaen University Khon Kaen 40002 Thailand .,Institute of Nanomaterials Research and Innovation for Energy (IN-RIE), NANOTEC-KKU RNN on Nanomaterials Research and Innovation for Energy, Khon Kaen University Khon Kaen 40002 Thailand
| | - Pornjuk Srepusharawoot
- Giant Dielectric and Computational Design Research Group (GD-CDR), Department of Physics, Faculty of Science, Khon Kaen University Khon Kaen 40002 Thailand .,Institute of Nanomaterials Research and Innovation for Energy (IN-RIE), NANOTEC-KKU RNN on Nanomaterials Research and Innovation for Energy, Khon Kaen University Khon Kaen 40002 Thailand
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Jumpatam J, Putasaeng B, Chanlek N, Thongbai P. Influences of Sr 2+ Doping on Microstructure, Giant Dielectric Behavior, and Non-Ohmic Properties of CaCu 3Ti 4O 12/CaTiO 3 Ceramic Composites. Molecules 2021; 26:molecules26071994. [PMID: 33915919 PMCID: PMC8036402 DOI: 10.3390/molecules26071994] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 03/24/2021] [Accepted: 03/26/2021] [Indexed: 11/16/2022] Open
Abstract
The microstructure, dielectric response, and nonlinear current-voltage properties of Sr2+-doped CaCu3Ti4O12/CaTiO3 (CCTO/CTO) ceramic composites, which were prepared by a solid-state reaction method using a single step from the starting nominal composition of CCTO/CTO/xSrO, were investigated. The CCTO and CTO phases were detected in the X-ray diffraction patterns. The lattice parameter increased with increasing Sr2+ doping concentration. The phase compositions of CCTO and CTO were confirmed by energy-dispersive X-ray spectroscopy with elemental mapping in the sintered ceramics. It can be confirmed that most of the Sr2+ ions substituted into the CTO phase, while some minor portion substituted into the CCTO phase. Furthermore, small segregation of Cu-rich was observed along the grain boundaries. The dielectric permittivity of the CCTO/CTO composite slightly decreased by doping with Sr2+, while the loss tangent was greatly reduced. Furthermore, the dielectric properties in a high-temperature range of the Sr2+-doped CCTO/CTO ceramic composites can be improved. Interestingly, the nonlinear electrical properties of the Sr2+-doped CCTO/CTO ceramic composites were significantly enhanced. The improved dielectric and nonlinear electrical properties of the Sr2+-doped CCTO/CTO ceramic composites were explained by the enhancement of the electrical properties of the internal interfaces.
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Affiliation(s)
- Jutapol Jumpatam
- Department of Fundamental Science, Faculty of Science and Technology, Surindra Rajabhat University, Surin 32000, Thailand;
| | - Bundit Putasaeng
- National Metal and Materials Technology Center (MTEC), Thailand Science Park, Pathumthani 12120, Thailand;
| | - Narong Chanlek
- Synchrotron Light Research Institute (Public Organization), 111 University Avenue, Muang District, Nakhon Ratchasima 30000, Thailand;
| | - Prasit Thongbai
- Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
- Institute of Nanomaterials Research and Innovation for Energy (IN-RIE), Khon Kaen University, Khon Kaen 40002, Thailand
- Correspondence:
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