Processing and Application of Ceramics最新文献_第6页

Sintering of layered ferrite-BaTiO3 ceramics: Analysis of interfaces and effects of shrinkage mismatch 层状铁素体- batio3陶瓷的烧结:界面分析及收缩失配的影响

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2022-01-01 DOI: 10.2298/pac2202134a

Mayara dos Santos Amarante, Júlia Maria de Morais Santos, J. Machado, M. Lente, Vera Lúcia Othéro de Brito

{"title":"Sintering of layered ferrite-BaTiO3 ceramics: Analysis of interfaces and effects of shrinkage mismatch","authors":"Mayara dos Santos Amarante, Júlia Maria de Morais Santos, J. Machado, M. Lente, Vera Lúcia Othéro de Brito","doi":"10.2298/pac2202134a","DOIUrl":"https://doi.org/10.2298/pac2202134a","url":null,"abstract":"In the present work, densification and microstructure evolution of cobalt ferrite (FCO), nickel-cobalt ferrite (FNICO) and BaTiO3 (TB) ceramics under different sintering conditions were investigated. Subsequently, layered ferrite-BaTiO3 samples were formed by uniaxial pressing of the corresponding ceramic powders. These green samples were sintered with two different sintering schedules, aiming to study the ferrite-BaTiO3 interfaces after sintering. The analyses were made at the cross section of the interfaces and at the interface surfaces after separation of the layers. The sintered layered samples were utilized to analyze sintering mismatch, diffusion at the interfaces and identification of some newly formed phases. EDS analysis across the TB-FCO interface showed evidences of diffusion. It was observed that the FNICO layers were detached from TB during sintering, but the same was not observed in the TB-FCO samples, although shrinkage mismatch resulted in some defects. XRD analyses suggested the presence of Ti2O at the TB-FCO interface and BaTiNiFe10O19 at the TB-FNICO interface as products of the reactions between the ferrites and BaTiO3.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68580823","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: 1

Conductivity and electrochemical stability of Li+ substituted high-entropy Lix(mM0.2Co0.2Ni0.2Cu0.2Zn0.2)1-0.5xO ceramics Li+取代高熵Lix(mM0.2Co0.2Ni0.2Cu0.2Zn0.2)1-0.5xO陶瓷的电导率和电化学稳定性

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2022-01-01 DOI: 10.2298/pac2203201k

Yazhou Kong, Guang Hu, Kailong Zhang, Weiwei Hu

{"title":"Conductivity and electrochemical stability of Li+ substituted high-entropy Lix(mM0.2Co0.2Ni0.2Cu0.2Zn0.2)1-0.5xO ceramics","authors":"Yazhou Kong, Guang Hu, Kailong Zhang, Weiwei Hu","doi":"10.2298/pac2203201k","DOIUrl":"https://doi.org/10.2298/pac2203201k","url":null,"abstract":"In this work, high-entropy Lix(Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)1-0.5xO (x = 0, 0.1, 0.2, 0.3, 0.4) ceramics with rocksalt structure were synthesized via simple sol-gel method and sintered at 1000?C. The crystal structure, crosssection micromorphology, conductivity, electronic conductivity and electrochemical stability of the sintered Lix(Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)1-0.5xO ceramics were investigated by X-ray diffraction, SEM, AC-impedance, DC-polarization and cyclic voltammetry, respectively. The Lix(Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)1-0.5xO ceramics present single rock-salt structure and no impurities were detected. The Li0.3(Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)0.85O (x = 0.3) sample has the highest conductivity of 1.46 ? 10?5 S/cm at 30?C, with an activation energy of 0.334 eV. Conductivity of the (Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)O ceramics is enhanced by about four orders of magnitude with the partial substitution of (Mg0.2Co0.2Ni0.2Cu0.2Zn0.2) by lithium. The electronic conductivity of the Li0.3(Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)0.85O ceramics is much lower than its ionic conductivity, which suggests that Li0.3(MgCoNiCuZn)0.85O can be treated as ionic conductor. The Li0.3(Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)0.85O sample is electrochemically stable between 1.23 and 4.7 V.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68580879","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: 1

Incorporation of cerium oxide into hydroxyapatite/chitosan composite scaffolds for bone repair 氧化铈在羟基磷灰石/壳聚糖复合支架中的应用

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2022-01-01 DOI: 10.2298/pac2203207m

Büşra Mutlu, Sena Çaylak, Şeyma Duman

引用次数: 3

Characterization of grain boundary character distribution in cemented carbides via a stereological method 用立体学方法表征硬质合金的晶界特征分布

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2022-01-01 DOI: 10.2298/pac2204341y

Xiaokun Yuan, Y. Ji

引用次数: 0

Effect of annealing temperature and cadmium doping on structure and magnetic properties of neodymium orthoferrite nanoparticles synthesized by a simple co-precipitation method 退火温度和镉掺杂对共沉淀法合成的钕铁氧体纳米粒子结构和磁性能的影响

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2022-01-01 DOI: 10.2298/pac2204321n

T. Nguyen, A. Nguyen, V. Mittova, H. Chau, T. Nguyen, I. Mittova, X. Bui

{"title":"Effect of annealing temperature and cadmium doping on structure and magnetic properties of neodymium orthoferrite nanoparticles synthesized by a simple co-precipitation method","authors":"T. Nguyen, A. Nguyen, V. Mittova, H. Chau, T. Nguyen, I. Mittova, X. Bui","doi":"10.2298/pac2204321n","DOIUrl":"https://doi.org/10.2298/pac2204321n","url":null,"abstract":"A series of Nd1-xCdxFeO3 (x = 0.1, 0.2 and 0.3) nanoparticles were successfully synthesized from Nd(III), Cd(II) and Fe(III) nitrates by a simple co-precipitation method in boiling water with a 5% sodium hydroxide aqueous solution (without any surfactants) and annealed at 700, 850 and 950?C for 1 h. SEM and TEM analyses showed particle sizes in the range of 50-70 nm. According to XRD the average crystallite size increased with the annealing temperature, but decreased when the cadmium concentration increased. As the annealing temperature was raised from 700 to 950?C, the magnetic properties, such as coercivity (Hc), remanent magnetization (Mr) and saturation magnetization (Ms), of the Nd0.8Cd0.2FeO3 sample also increased. In general, the Hc, Mr and Ms values increased with the degree of cadmium doping. The synthesized Nd1-xCdxFeO3 nanopowders havemuch larger coercivity values than some other rare-earth perovskites, such as Nd1-xSrxFeO3, NdFe1-xCoxO3, LaFe1-xTixO3, YFe1-xNixO3, Y1-xCdxFeO3, La1-xCdxFeO3 or Bi1-xCdxFeO3. The high Hc value (1916.52-4833.41Oe) of the synthesized Nd1-xCdxFeO3 nanopowders enables their use for permanent magnets or magnetic recording on hard disks and tapes.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68582316","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: 1

Bone-bioglass graft - an alternative to improve the osseointegration 骨生物玻璃移植物-一种改善骨融合的替代方法

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2022-01-01 DOI: 10.2298/pac2203230l

Rauany Lopes, R. Furlan, W. Correr, Lísias P. Novo, L. Montrezor, E. Pecoraro, E. Trovatti

{"title":"Bone-bioglass graft - an alternative to improve the osseointegration","authors":"Rauany Lopes, R. Furlan, W. Correr, Lísias P. Novo, L. Montrezor, E. Pecoraro, E. Trovatti","doi":"10.2298/pac2203230l","DOIUrl":"https://doi.org/10.2298/pac2203230l","url":null,"abstract":"Homologues and xenogenous bones are currently the most used grafts in dentistry because of their performance. However, some inherent disadvantages of these materials have not yet been overcome, such as the lack of biological properties to improve the new bone formation in situ and the long remodeling time. The main aim of this work was to improve the performance of the commercial bone-based grafts and study its properties in vitro. For this purpose, rat bone was combined with bioglass, a synthetic biomaterial that displays high degradation kinetics and bioactivity properties, endowed with biological properties. The sol-gel method was used for 45S5 bioglass (45S5) synthesis, using TEOS and water soluble salts as starting materials. 45S5 was then associated with the rat bone, generating the new graft. FTIR results indicated the hydroxyapatite formation after the bioactivity tests. SEM and bioactivity results were used to assess the evolution of the graft. The bioactivity tests showed that after 30 days the mass gain of about 30 wt.% was due to the deposition of hydroxyapatite crystals at the surface of the grafts, suggesting the potential properties of this new graft for application in implantology.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68581185","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

Effect of precursor powder uniformity on structure and electrical properties of gadolinium-doped cerium oxide ceramics 前驱体粉末均匀性对掺钆氧化铈陶瓷结构和电性能的影响

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2022-01-01 DOI: 10.2298/pac2201042s

Haoran Song, Tao Wang, Huan Wang, Yuxin Ma, Wen-Chen Yang, D. Yan, D. Wang, Runru Liu

{"title":"Effect of precursor powder uniformity on structure and electrical properties of gadolinium-doped cerium oxide ceramics","authors":"Haoran Song, Tao Wang, Huan Wang, Yuxin Ma, Wen-Chen Yang, D. Yan, D. Wang, Runru Liu","doi":"10.2298/pac2201042s","DOIUrl":"https://doi.org/10.2298/pac2201042s","url":null,"abstract":"The effects of precursor powder uniformity on structure and electrical properties of Gd-doped CeO2 (GDC) electrolytes were studied. The as-synthesized GDCx powders (x = 5, 10 and 15 at.%) were calcined at 600 and 1200?C and combined in mass ratios of 100:0 and 95:5 to obtain two precursor powders with different particle size distributions. Sintering of the pressed pellets was performed at 1300 and 1400?C for 10 h. Crystal structure, microstructure and electrical properties of the samples were investigated by X-ray diffraction, scanning electron microscopy and AC impedance spectroscopy, respectively. When a smaller proportion of large particles (calcined at 1200 ?C) were present in the precursor powders, sinterability of the prepared samples is slowed down, which had an adverse effect on electrical conductivity. The lower the concentration of Gd, the more significant is the adverse effect. At higher sintering temperature (1400?C), the influence of Gd concentration on microstructure and ionic conductivity is more obvious. The GDC15 sample, prepared from the precursor powder calcined at 600?C, had the highest conductivity and ?asGB/?Bulk ratio at 300?C.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68580320","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: 1

Facile synthesis of high colour rendering BiVO4 yellow pigment via self-propagating combustion method 自蔓延燃烧法快速合成高显色性BiVO4黄色颜料

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2022-01-01 DOI: 10.2298/pac2204335z

Xiaojun Zhang, Wen Li, Weihui Jiang, Yanqiao Xu, Jianye Liang, Qian Wu, L. Miao

引用次数: 0

The influence of carbon source and content on structure and mechanical properties of sic processed via spark plasma sintering method 碳源和碳含量对放电等离子烧结碳化硅材料组织和力学性能的影响

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2022-01-01 DOI: 10.2298/pac2204384y

Z. Yaşar, V. Delucca, R. Haber

引用次数: 1

Novel cathode material for solid oxide fuel cells based on Ba-doped Sr2Fe1.5Mo0.5O6 基于ba掺杂Sr2Fe1.5Mo0.5O6的新型固体氧化物燃料电池正极材料