Journal of Electroceramics最新文献

Honoring a Legacy – Heartfelt Thanks to Our Former Editor-in-Chief! 向遗产致敬--衷心感谢我们的前任主编！

IF 1.7 4区材料科学

Journal of Electroceramics Pub Date : 2024-10-28 DOI: 10.1007/s10832-024-00362-0

Sanjay Mathur

引用次数: 0

Efficient acetone sensing utilizing Co3O4-Embedded porous ZnO nanofibers 基于co3o4包埋多孔ZnO纳米纤维的高效丙酮传感

IF 1.7 4区材料科学

Journal of Electroceramics Pub Date : 2024-10-05 DOI: 10.1007/s10832-024-00367-9

Jiyeon Lee, Hyojung Kim, Muhammad Hilal, Zhicheng Cai

引用次数: 0

MgTiO3-based ceramics for enhanced EMI shielding solutions in K and Ka frequency bands mgtio3基陶瓷在K和Ka频段增强EMI屏蔽解决方案

IF 1.7 4区材料科学

Journal of Electroceramics Pub Date : 2024-10-05 DOI: 10.1007/s10832-024-00372-y

Jasdeep Singh, Shalini Bahel

{"title":"MgTiO3-based ceramics for enhanced EMI shielding solutions in K and Ka frequency bands","authors":"Jasdeep Singh, Shalini Bahel","doi":"10.1007/s10832-024-00372-y","DOIUrl":"10.1007/s10832-024-00372-y","url":null,"abstract":"<div>This study investigates the microwave dielectric and shielding properties of MgTiO3-based solid solutions across the K (18–26.5 GHz) and Ka (26.5–40 GHz) frequency bands. Synthesized via a conventional solid-state mixed oxide route using MgO and Mg(OH)2 as raw materials, the dielectric properties of MgTiO3 and Mg(Ti0.95Sn0.05)O3 solid solutions varied with composition and raw material. Results showed that MgO-based materials exhibited higher relative permittivity (ɛr) and loss tangent (tan δ) compared to Mg(OH)2-based materials. Furthermore, the ɛr of the prepared samples decreased with Sn4+ substitution, attributed to the lower dielectric polarizability of Sn4+ cations compared to Ti4+ cations. Results also indicated a decrease in tan δ with Sn4+ substitution, resulting from a reduction in octahedral tilting upon partial replacement of Ti4+ cations with Sn4+ cations in MgTiO3. Shielding property characterization revealed that all samples exhibited frequency-selective and tunable shielding capabilities, with tuning achievable through variations in composition or shield thickness. Notably, in the K frequency band, MgO-based MgTiO3 exhibited superior dielectric properties, with a sample thickness of 2.9 mm achieving a shielding effectiveness (SE) of up to 35.62 dB at 22.30 GHz, effectively suppressing over 99.97% of incoming radiation. Similarly, in the Ka frequency band, MgO-based Mg(Ti0.95Sn0.05)O3 demonstrated remarkable SE, with a sample thickness of 1.8 mm reaching SE of 38.62 dB at 31.60 GHz, attenuating over 99.98% of incoming radiation. These findings suggest potential for frequency-selective and adjustable EMI shielding in next-gen technologies.</div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"52 4","pages":"338 - 357"},"PeriodicalIF":1.7,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural, dielectric, and electrical studies of Sm-doped Sr0.95Ba0.05Bi2Nb2O9 lead-free relaxor ceramics sm掺杂Sr0.95Ba0.05Bi2Nb2O9无铅弛豫陶瓷的结构、介电和电学研究

IF 1.7 4区材料科学

Journal of Electroceramics Pub Date : 2024-10-04 DOI: 10.1007/s10832-024-00361-1

Mohamed Afqir, Didier Fasquelle, Amina Tachafine, Yingzhi Meng, Mohamed Elaatmani, Abdelhamid Oufakir, Mohamed Daoud

{"title":"Structural, dielectric, and electrical studies of Sm-doped Sr0.95Ba0.05Bi2Nb2O9 lead-free relaxor ceramics","authors":"Mohamed Afqir, Didier Fasquelle, Amina Tachafine, Yingzhi Meng, Mohamed Elaatmani, Abdelhamid Oufakir, Mohamed Daoud","doi":"10.1007/s10832-024-00361-1","DOIUrl":"10.1007/s10832-024-00361-1","url":null,"abstract":"<div>Raw materials were etched by nitric acid to release utterly carbon dioxide. An excess of citric acid was then employed as fuel to prime the combustion reaction for the synthesis of Sr0.95Ba0.05Bi2−xSmxNb2O9 (x = 0 (SrBi2Nb2O9), 0.1, and 0.2) compounds. X-ray diffraction, Fourier-transformed infrared, and Raman techniques revealed quite certain that there is a link between dopant amounts and structural changes. One is that the cell volume was smoothly reduced. Second, the bond force constant decreased slightly when the dopant was introduced into the lattice. Even though the SrBi2Nb2O9 compound is not only doped by samarium but also by barium, samarium is the only dopant that affects dielectric and electrical properties. Doping with samarium enhances the dielectric constant at room temperature by reducing the Curie temperature, and it turns ferroelectric normal into relaxor behavior. The results of AC conductivity and electrical modulus laid out that one extreme defect was that a significant amount of cation exchange occurs in Sr0.95Ba0.05Bi2−xSmxNb2O9 samples and a large amount of oxygen vacancies were released. Overlapping large polaron tunneling model (OLPT) mechanisms was the adequate model for these compounds.</div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"52 4","pages":"326 - 337"},"PeriodicalIF":1.7,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spark plasma sintering of cerium (IV) oxide under a carbon dioxide atmosphere 氧化铈（IV）在二氧化碳气氛下的放电等离子烧结

IF 1.7 4区材料科学

Journal of Electroceramics Pub Date : 2024-10-01 DOI: 10.1007/s10832-024-00363-z

Anil Prasad, Linu Malakkal, Lukas Bichler, Jerzy Szpunar

{"title":"Spark plasma sintering of cerium (IV) oxide under a carbon dioxide atmosphere","authors":"Anil Prasad, Linu Malakkal, Lukas Bichler, Jerzy Szpunar","doi":"10.1007/s10832-024-00363-z","DOIUrl":"10.1007/s10832-024-00363-z","url":null,"abstract":"<div>Cerium dioxide (CeO2) finds extensive utility in electro ceramics applications, including solid oxide fuel cells, oxygen sensors, and catalysts. However, Spark Plasma Sintering (SPS) of CeO2 presents challenges due to the increased mobility of O2− ions in the presence of an electric field, as well as its reactivity with graphite tooling. Traditionally, CeO2 is sintered in an oxidative environment to prevent it from reducing to CeO2−δ or Ce2O3. Nevertheless, oxidative atmospheres are detrimental to the graphite and steel tooling used in SPS processing. In this study, we investigated CeO2 SPS in a CO2 atmosphere and observed slight increase in the relative density (RD) of the as-sintered samples in comparison to those sintered in an Ar atmosphere. The improved densification is attributed to reduced formation of oxygen vacancies in the CO2 atmosphere. Furthermore, the reaction between CeO2 and graphite generates COx gases, and that reaction can be reversed in a CO2 atmosphere. In summary, CeO2 SPS in a CO2 environment demonstrates superior densification, effectively mitigating the challenges associated with ionic mobility and graphite reactivity.</div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"52 4","pages":"273 - 282"},"PeriodicalIF":1.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An overview of the optical and magnetic properties of Ba0.6Cd0.4TiO3 micro rods prepared by the facile sol-gel approach for spintronic applications 溶胶-凝胶法制备自旋电子用Ba0.6Cd0.4TiO3微棒的光学和磁性研究

IF 1.7 4区材料科学

Journal of Electroceramics Pub Date : 2024-09-28 DOI: 10.1007/s10832-024-00366-w

D. Ravikumar, S. C. Jeyakumar, V. Sherlin Vinita, S. Usharani, S. Sahaya Jude Dhas, D. Senthil Kumar, Abdulrahman I. Almansour, C. S. Biju

{"title":"An overview of the optical and magnetic properties of Ba0.6Cd0.4TiO3 micro rods prepared by the facile sol-gel approach for spintronic applications","authors":"D. Ravikumar, S. C. Jeyakumar, V. Sherlin Vinita, S. Usharani, S. Sahaya Jude Dhas, D. Senthil Kumar, Abdulrahman I. Almansour, C. S. Biju","doi":"10.1007/s10832-024-00366-w","DOIUrl":"10.1007/s10832-024-00366-w","url":null,"abstract":"<div>Over the years, there has been a relentless approach to manufacturing magnetic materials with a required magnetism whereby they could be tuned for a specific purpose such that there can be a lot of scope for pumping in new materials of technological importance. Because of its innovative uses in spintronic devices, titanate-based magnetic materials have received a lot of scientific as well as pioneering research recognition. Ba0.6Cd0.4TiO3 micro rods have been prepared in the current experimental study using the simple sol-gel technique. Ba0.6Cd0.4TiO3 has a rod-like morphology with a diameter of around 404–744 nm and a lattice strain (ϵ) of 5.4 × 10− 4 and dislocation density (δ) of 1.34 × 1014 m− 2, as seen by the W-H plot constructed from the XRD data. XPS analysis clearly indicates that the relatively small ferromagnetism perceived in Ba0.6Cd0.4TiO3 is caused by Ba defects or Ti3+ ions. Using the absorbance spectrum, the value of 3.18 eV is computed as the optical band gap. A low saturation magnetization, Ms = 3.58 × 10− 3 emu/g, a remanence, Mr = 2.72 × 10− 4 emu/g, and a coercivity, Hc = 122.45 Oe are additional characteristics observed for the micro rods in room-temperature ferromagnetism (RTFM). The RTFM observed in this study suggests that the synthesized microrods would be suitable for utilization in the developing field of spintronic devices.</div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"52 4","pages":"314 - 325"},"PeriodicalIF":1.7,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ionic-conductive poly (vinylidene fluoride) polymer as a versatile binder to stabilize high-voltage LiCoO2 cathode materials 离子导电聚偏氟乙烯聚合物作为稳定高电压LiCoO2正极材料的通用粘结剂

IF 1.7 4区材料科学

Journal of Electroceramics Pub Date : 2024-09-27 DOI: 10.1007/s10832-024-00364-y

Yikui Wang, Jianming Tao, Jiangjie Wang, Shaoyang Chen, Yanmin Yang, Yingbin Lin

{"title":"Ionic-conductive poly (vinylidene fluoride) polymer as a versatile binder to stabilize high-voltage LiCoO2 cathode materials","authors":"Yikui Wang, Jianming Tao, Jiangjie Wang, Shaoyang Chen, Yanmin Yang, Yingbin Lin","doi":"10.1007/s10832-024-00364-y","DOIUrl":"10.1007/s10832-024-00364-y","url":null,"abstract":"<div>Serious structural irreversibility and interfacial side reactions pose major challenges for the stable operation of LiCoO2 cathodes at high voltages. Herein, we report a polymer-based solid electrolyte (SLP) composed succinonitrile, LiTFSI and PVDF as a binder to address these issues. The SLP binder exhibits superior performance compared to traditional PVDF and PVDF binders with LiTFSI, with higher ionic conductivity (8.46 × 10− 5 S cm− 1 at 30 ℃), lower activation energy of 0.38 eV and excellent adhesion. Even with just 3% SLP binder, LiCoO2 cathode operating at a cutoff voltage of 4.6 V and loaded with ~ 6.0 mg cm− 2 active material demonstrates improved rate capability at higher compaction densities, delivering a discharge specific capacity of 146.5 mAh g− 1 after 100 cycles at 0.5 C-rate. The SLP binder not only enhances Li+ conduction but also facilitates the formation of a stable cathode-electrolyte interphase, thus reducing the Li+ diffusion barrier and interface polarization, and enhancing battery’s performance at low temperature. Furthermore, the SPL binder’s high compatibility and elasticity with the electrolyte mitigate irreversible structural changes and volume expansion in LiCoO2 during cycling, leading to better preservation of the layered structure and lower internal stress for stable cycling under high temperatures. This strategy provides a novel interface protection idea for electroceramic cathode materials and may facilitate commercial development.</div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"52 4","pages":"303 - 313"},"PeriodicalIF":1.7,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chemical characterization of perovskite BaTiO3 doped with different concentrations of Europium via coincidence doppler broadening spectroscopy 掺不同浓度铕的钙钛矿BaTiO3的重合多普勒展宽光谱化学表征

IF 1.7 4区材料科学

Journal of Electroceramics Pub Date : 2024-09-26 DOI: 10.1007/s10832-024-00365-x

Mahdi Ghasemifard, Misagh Ghamari

引用次数: 0

The effects of MnO2 on the microstructure and electrical properties based on ZnO-Bi2O3-Sb2O3-Cr2O3-Co2O3 varistors 基于 ZnO-Bi2O3-Sb2O3-Cr2O3-Co2O3 变阻器的 MnO2 对微结构和电气性能的影响

IF 1.7 4区材料科学

Journal of Electroceramics Pub Date : 2024-09-06 DOI: 10.1007/s10832-024-00360-2

Xiaolong Huang, Jiaqi Li, Guangxu Pan, Dachuan Zhu

{"title":"The effects of MnO2 on the microstructure and electrical properties based on ZnO-Bi2O3-Sb2O3-Cr2O3-Co2O3 varistors","authors":"Xiaolong Huang, Jiaqi Li, Guangxu Pan, Dachuan Zhu","doi":"10.1007/s10832-024-00360-2","DOIUrl":"10.1007/s10832-024-00360-2","url":null,"abstract":"<div>In this work, nano ZnO powders, Bi2O3, Sb2O3, Cr2O3, Co2O3 and a various content of MnO2 were blended thoroughly and pre-calcined at 800℃ and then pressed in to pellets which were sintered at 950℃ to form varistor ceramics. Subsequently, the effects of MnO2 on the microstructure and electrical properties of the ZnO-based varistor were investigated. It was found that the amount of spinel phase (Zn7Sb2O12) and Bi2O3 phase increased with the MnO2 increasing, while the content of pyrochlore (Zn2Bi3Sb3O14) phase decreased. As a result, the growth of ZnO grain was reduced with the average grain size from 9.5 μm down to 5.3 μm, leading to the increase of breakdown field of ZnO-based varistor. Particularly, the ZnO-based varistor with 1.2 mol% MnO2 exhibited the best comprehensive electrical performance with the breakdown field Eb of 901.4 V/mm, the nonlinear coefficient α of 66.7 and the leakage current density JL of 1.1 µA/cm2.</div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"52 3","pages":"261 - 270"},"PeriodicalIF":1.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142180059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis, microstructure and characterization of Ultra-low permittivity and dielectric loss ZnO-B2O3-SiO2 glass/SiO2 composites for LTCC application 用于 LTCC 应用的超低介电常数和介电损耗 ZnO-B2O3-SiO2 玻璃/二氧化硅复合材料的合成、微观结构和特性分析

IF 1.7 4区材料科学

Journal of Electroceramics Pub Date : 2024-07-25 DOI: 10.1007/s10832-024-00357-x

Yu Xin, Caixia Zhang, Yu Sun, Haojie Dai, Yangfu Liu, Zhongqing Tian, Jianxi Tong, Fancheng Meng

引用次数: 0