Processing and Application of Ceramics最新文献_第5页

Influence of powder characteristics on the sintering behaviour of reactive alumina powders 粉体特性对活性氧化铝粉体烧结性能的影响

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2022-01-01 DOI: 10.2298/pac2201001t

Hai Tang, Yingheng Shi, W. Yuan

{"title":"Influence of powder characteristics on the sintering behaviour of reactive alumina powders","authors":"Hai Tang, Yingheng Shi, W. Yuan","doi":"10.2298/pac2201001t","DOIUrl":"https://doi.org/10.2298/pac2201001t","url":null,"abstract":"Fine reactive alumina powders have a significant impact on the properties of refractories at high temperatures. Except for the hydration of cement and in situ reactions, the performance of castables is also correlated with the sintering of reactive alumina. The characteristics of fine alumina powders produced by various manufacturers are quite different. This work aims to investigate the comprehensive influence of powder characteristics on the sintering behaviour of reactive alumina powders. Three types of commercial reactive alumina powders were selected for experiments. The linear shrinkage, bulk density, apparent porosity and microstructure of alumina compacts calcined at different temperatures were analysed. It was demonstrated that large specific surface area and higher SiO2 content had a positive effect on the densification of alumina compacts. The calculation based on the hypothetical composition of alumina grain boundary indicated that SiO2 mainly participated in the formation of liquid. Therefore, more liquid was generated at the grain boundary of alumina grains containing higher SiO2 content, which resulted in better sinterability of reactive alumina powders.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68579424","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

Hydrophilic and hydrophobic TiO2 coatings by pulsed electrophoretic deposition 脉冲电泳沉积制备亲疏水TiO2涂层

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2022-01-01 DOI: 10.2298/pac2201083m

Hidetoshi Miyazaki, M. Yamane, Yu Mimaru

引用次数: 0

Investigations on colloidal and dry formed alumina parts under pressure and pressure-less conditions 在压力和无压力条件下对胶体和干燥成型氧化铝零件的研究

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2022-01-01 DOI: 10.2298/pac2202160r

P. Raju, P. Biswas, A. Khanra, Y. Rao, Roy Johnson

引用次数: 0

Effect of TiH2 on microstructure of hydroxyapatite sintered at various temperatures TiH2对不同温度下羟基磷灰石烧结组织的影响

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2022-01-01 DOI: 10.2298/pac2202125a

N. Amirthalingam, Sathishkumar Panchatcharam, T. Deivarajan, Manohar Paramasivam

引用次数: 0

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":null,"pages":null},"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":null,"pages":null},"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

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":null,"pages":null},"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

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":null,"pages":null},"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