Advances in Applied Ceramics最新文献

{"title":"Biphasic BiFeO3 ceramics based on rhombohedral and tetragonal polymorphs","authors":"Cristian Casut, R. Bucur, N. Miclău, I. Malaescu, M. Miclau","doi":"10.1080/17436753.2023.2170618","DOIUrl":"https://doi.org/10.1080/17436753.2023.2170618","url":null,"abstract":"ABSTRACT From a new perspective, polymorphism is now often considered as a functional property that extends the applications of many materials. BiFeO3 is still an interesting material from both fundamental and applied points of view. A unique characteristic of BiFeO3 film, the polymorphism was stabilised only using the epitaxial strain caused by the substrate of the film. Here we report the hydrothermal synthesis of biphasic BiFeO3 ceramics using low NaOH concentration and temperature. The ability of BiFeO3 ceramics to morph into tetragonal and rhombohedral allotropic phases was demonstrated, confirming the theoretical prediction that the polymorphism can be stabilised even in powder form. Based on our experimental study NaOH(aq) is proposed as responsible for the strain on the structure of the rhombohedral phase. In addition, the in-depth characterisation of this biphasic ceramic opens up new opportunities for the technological applications of BiFeO3 material.","PeriodicalId":7224,"journal":{"name":"Advances in Applied Ceramics","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74314494","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}

{"title":"Mechanical and thermal insulation properties of carbon fibre-reinforced carbon aerogel composites","authors":"Longlong Li, Junzong Feng, Fengqi Liu, Liangjun Li, Yonggang Jiang, Jian Feng","doi":"10.1080/17436753.2022.2156163","DOIUrl":"https://doi.org/10.1080/17436753.2022.2156163","url":null,"abstract":"ABSTRACT Carbon fibre-reinforced carbon aerogel composites (C/CAs) were prepared by using polyacrylonitrile (PAN) and phenolic (PH) carbon precursor fibres as reinforcements, respectively, then impregnated with resorcinol-formaldehyde sol, aging, solvent exchanging, CO2 supercritical drying and carbonization at 1000°C. The physical properties, structural morphology and mechanical and thermal insulation behaviour of the two kinds of composites were further compared. Pore structure analysis shows that the PH-based C/CAs have a larger specific surface area (438.92 m2·g−1) and richer mesoporous volume than the PAN-based C/CAs. Mechanical behaviour of the C/CAs has been changed, but the stronger enhancement effects belong to PAN-based C/CAs (compressive strength in xy and z-directions are 1.63±0.10 MPa and 1.22±0.19 MPa, bending strength is 3.62±0.50 MPa). However, the PH-based C/CA composites have relatively low thermal conductivities, ranging from 0.027 to 0.164 W·m−1·K−1 between 25 and 1800°C.","PeriodicalId":7224,"journal":{"name":"Advances in Applied Ceramics","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90533422","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}

{"title":"Editorial: special issue on PIEZO2017: Electroceramics for End Users IX","authors":"L. Pardo, A. González, J. Bartolomé, P. Ochoa","doi":"10.1080/17436753.2022.2141994","DOIUrl":"https://doi.org/10.1080/17436753.2022.2141994","url":null,"abstract":"This special issue of the journal Advances in Applied Ceramics comprises selected papers from the conference PIEZO2017: Electroceramics for End Users IX, that took place in Cercedilla (Madrid, Spain) on 19–22 February 2017 at the ‘Lucas Olazabal’ Forestry Residence of the ‘Universidad Politécnica de Madrid (UPM)’. There were 80 participants from academia and industry. They came from France, Spain, Germany, Mexico, Denmark, Slovenia, Norway, Italy, Switzerland, Finland, Uruguay, Czech Republic, Portugal, U.S.A., Latvia, Israel and Belgium. The conference was organised by the European Institute of Piezoelectric Materials and Devices (Piezoinstitute), the ‘Instituto de Ciencia de Materiales de Madrid (ICMM).CSIC’ and the School of Telecommunications Systems and Engineering (ETSIST) of the UPM. The conference was also made possible through the support of the companies Meggitt Sensing Systems (DK) and Aixacct Systems (DE). The sessions covered studies on piezoelectrics, ferroelectrics, relaxors and tuneable materials, applications, new processing techniques, lead-free ceramics and other sustainable materials, modelling and advanced characterisation. The invited talks were given by N. Setter (EPFL, CH) – who spoke in homage to Prof. L. E. Cross, from The Pennsylvania State University (U.S.A.), who passed away on December 2016 – F. Montero de Espinosa (ITEFI-CSIC, ES), M. E. Villafuerte-Castrejón (UNAM, MX) and D. C. Sinclair (Sheffield Univ., UK). The scientific programme consisted of 32 oral and 20 poster presentations. PIEZO2017 provided an opportunity to discuss challenges and future trends in this area. The conference was of high scientific level and technical quality. After a peer-review process according to the rules of Advances in Applied Ceramics journal, 10 invited articles were accepted for publication in this Special Issue. These works give a wide coverage of the topics presented in the conference from materials preparation (‘Ba0.9Ca0.1TiO3: microwave-assisted hydrothermal synthesis and piezoelectric properties’ [1]) to properties (‘Structural and functional characterisation of KNNS-BNKZ lead-free piezoceramics’ [2], ‘Elasto-optic behavior in epitaxial films of perovskite oxide ferroelectrics’ [3], ‘The representation of coupling interactions in the material properties open database (MPOD)’ [4] and ‘Methodology to evaluate variations in piezoelectric constants after aging process’ [5]) and device design and modelling (‘Design of piston-like piezoelectric transducers based on a phononic crystal’ [6], ‘Parametric study of a thin piezoelectric cantilever for energy harvesting applications’ [7], ‘Virtual instrument to obtain electrical models of piezoelectric elements used in energy harvesting’ [8], ‘Modelling of the mechanical response of piezoelectric structures from millimeter to micrometer’ [9] and ‘Effects of the LGT crystal quality on the resonance frequency stability of bulk acoustic waves resonators’ [10]) of piezoelectrics and related m","PeriodicalId":7224,"journal":{"name":"Advances in Applied Ceramics","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83707388","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}

{"title":"Introduction to research on advanced ceramics in dentistry (4th Advanced Ceramics and Technologies for Dentistry (ACT4D) 2020)","authors":"A. Kocjan","doi":"10.1080/17436753.2022.2139047","DOIUrl":"https://doi.org/10.1080/17436753.2022.2139047","url":null,"abstract":"","PeriodicalId":7224,"journal":{"name":"Advances in Applied Ceramics","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81978418","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}

{"title":"Fabrication and characterisation of ZrSi2 ceramics via reactive hot-pressing","authors":"Yasith Chameendra Jayakody Mudiyanselage, K. Ramachandran, Doni Daniel Jayaseelan","doi":"10.1080/17436753.2022.2139448","DOIUrl":"https://doi.org/10.1080/17436753.2022.2139448","url":null,"abstract":"ABSTRACT ZrSi2 was fabricated via reactive hot-pressing technique for 45 min at 1250°C and 1350°C, respectively. The hot-pressed sample exhibited Vickers hardness of 10.93 ± 0.32 GPa and indentation fracture toughness of 3.16 ± 0.54 MPa.m1/2. Thermal conductivity (RT-2.99 W (m.K)−1) and diffusivity (RT–18.2 mm2 s−1) of the sample decreased with increasing temperature due to phonon scattering. Oxidation studies were carried out for the hot-pressed samples from 1000°C to 1200°C for 5, 48 and 100 h in air. The oxidation test results showed that ZrSi2 followed selective oxidation with Si diffusing into the oxide layers at high temperatures. At 1200°C, the surface of ZrSi2 oxidised completely to form a high-temperature stable phase, zircon (ZrSiO4). The autoclave test at 250°C and 250 bar shown negligible mass gain (∼0.022 g) which suggests the usage of ZrSi2 for nuclear fuel cladding applications.","PeriodicalId":7224,"journal":{"name":"Advances in Applied Ceramics","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86942652","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}

{"title":"Fabrication and characterisation of ZrO2-reinforced porous mullite ceramics","authors":"Pengyu Ji, Chenghao Song, Yongwan Wu, Hailiang Deng, X. Deng, Yi Zhang, Xiang-jin Ding, Haijun Zhang, S. Ran","doi":"10.1080/17436753.2022.2155369","DOIUrl":"https://doi.org/10.1080/17436753.2022.2155369","url":null,"abstract":"ABSTRACT ZrO2-reinforced porous mullite ceramics were fabricated by a foam-gel casting approach using zircon (ZrSiO4) powders and alumina (Al2O3) powders as raw materials. The influence of firing temperature on the phase composition of porous samples was analysed. Based on the analysis results, the effects of a blowing agent on the physical properties, microstructure, mechanical strength and heat conductivity of ZrO2-reinforced porous mullite samples fired at 1600°C were investigated. In the present study, linear shrinkage, porosity and mean pore size of ZrO2-reinforced porous mullite ceramics increased, and volume density, mechanical strength and heat conductivity decreased. When the dosage of the blowing agent was 1.0 vol.-%, the flexural strength and compressive strength of ZrO2-reinforced porous mullite sample with 77.4% porosity respectively reached 3.0 and 10.9 MPa, and their heat conductivity was kept at 0.181 W m−1 K−1.","PeriodicalId":7224,"journal":{"name":"Advances in Applied Ceramics","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81606413","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}

{"title":"Microstructure characteristics and mechanical properties of Al2O3/MgAl2O4 directionally solidified eutectic ceramic","authors":"Shuoyan Zhai, Xianying Cao, Juncheng Liu, Qiang Liu","doi":"10.1080/17436753.2022.2119545","DOIUrl":"https://doi.org/10.1080/17436753.2022.2119545","url":null,"abstract":"ABSTRACT Al2O3/MgAl2O4 directionally solidified eutectic ceramic (DSEC) rods with Φ 10 mm were prepared with induction heating zone melting (IHZM) method. The phase components of the DSEC were composed of MgAl2O4 phase growing along the preferred orientation 〈311〉 and Al2O3 phases growing along the preferred orientation 〈110〉. In the DSEC, the Al2O3 phase is the matrix phase mixed with part of MgAl2O4 phase and the other part of MgAl2O4 phase forms slice structure. Both the DSEC density and hardness decrease with the increase of the growth rate, due to the increase of micropores in DSEC with the higher growth rate. However, its fracture toughness improved due to the fine interface spacing toughening and the dispersion toughening. The highest hardness and fracture toughness of DSEC are 19.3 GPa and 3.74 MPa·m1/2, respectively, the toughening effect could be attributed to the crack deflection and bifurcation hindering the propagation of crack in DSEC.","PeriodicalId":7224,"journal":{"name":"Advances in Applied Ceramics","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81977667","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}

{"title":"Low-temperature synthesis of Ti3SiC2 powders in mixed molten salts","authors":"Benjun Cheng, Can Yao, Juntong Huang, Cheng Liu, Shaowei Zhang, He-song Li","doi":"10.1080/17436753.2022.2109259","DOIUrl":"https://doi.org/10.1080/17436753.2022.2109259","url":null,"abstract":"ABSTRACT A homogeneous and high-purity titanium silicon carbon powder (Ti3SiC2) is synthesised, using titanium, silicon and carbon black powders as raw starting materials at low temperatures via an improved molten salt method. This work demonstrates that multiple molten salts are more beneficial in facilitating the synthesis of Ti3SiC2 powder. The effect of reaction temperature on the purity of the synthesis was investigated, and the amount of excess Si required to compensate for their evaporating losses was determined. The powders were characterised by Various instruments. SEM and TEM images show that the as-prepared Ti3SiC2 retained its homogeneous morphology, and is near-pure, 500-600 nm in size, and generally well-dispersed. We believe that TiC and TiSi2 formed by the molten salt method at low temperatures is the dominant factor in the reduced synthesis temperature and good dispersion of the final Ti3SiC2 powder.","PeriodicalId":7224,"journal":{"name":"Advances in Applied Ceramics","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91162356","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}

{"title":"Thermal stability of TiC–Ti3AlC2 and TiC–Ti3AlC composites during selective laser treatment","authors":"M. Krinitcyn","doi":"10.1080/17436753.2022.2121460","DOIUrl":"https://doi.org/10.1080/17436753.2022.2121460","url":null,"abstract":"ABSTRACT In this article, the thermal stability of TiC–Ti3AlC2 and TiC–Ti3AlC composites during selective laser sintering/melting is studied. The phase composition evolution after laser processing is investigated and the structure of the obtained samples is also described. Samples were obtained by selective laser sintering/melting from mixtures of commercial powders and from a synthesised composite powder. It is possible to maintain most of the MAX-phase using the laser processing parameters described; in addition, the intermetallic phase is formed.","PeriodicalId":7224,"journal":{"name":"Advances in Applied Ceramics","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88623770","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}

{"title":"Temperature dependence in ageing process in commercial zirconia dental ceramics","authors":"Shafique Ahmed, Chunxia Song, Jiyue Wu, B. Li, Haixue Yan","doi":"10.1080/17436753.2022.2121536","DOIUrl":"https://doi.org/10.1080/17436753.2022.2121536","url":null,"abstract":"ABSTRACT The temperature dependence of ageing in the commercial zirconia ceramic is crucial in the applications of dental implants. This study investigated the relationship between structure and mechanical properties of the zirconia dental ceramics and their susceptibility to human body temperature in a prolonged time. Commercial samples were put into exaggerated low-temperature degradation (LTD) as per ISO standard and three-quarters of its ageing temperature to see its effect on LTD in zirconia-based ceramics. The results reveal a negligible effect of LTD on the material at a temperature lower than 134°C, which is the standard LTD temperature for zirconia.","PeriodicalId":7224,"journal":{"name":"Advances in Applied Ceramics","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87093416","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}