International Journal of Ceramic Engineering & Science最新文献

{"title":"Investigation of the properties of ZrC nanopowder synthesized by the carbothermal reduction method using phenolic resin","authors":"Farhad Farhang Rad,&nbsp;Mehri Mashhadi,&nbsp;Kianoosh Akbari Arateh","doi":"10.1002/ces2.10197","DOIUrl":"10.1002/ces2.10197","url":null,"abstract":"<p>Owing to economic reasons and the morphology of the surface of particles, carbothermal reduction is a suitable method for the synthesis of the desired materials. In this research, ZrC nanopowder was synthesized using phenolic resin as the carbon source and ZrO₂ powder as the source of zinc by the carbothermal method. ZrO₂ powder was milled for 1, 2, 3, 4, 6, and 7 h followed by combining with phenolic resin and ethanol with stoichiometric and nonstoichiometric ratios, and then the samples were pyrolyzed for 60 min at 800°C. Then, the samples were heat treated in an argon atmosphere in two stages at 1,600°C for 60 and 90 min. XRD and FE-SEM were used to investigate the microstructure of the samples. By increasing the molar ratio and increasing the heat treatment time, the ZrC phase content in the samples increased so that the highest amount of ZrC phase was observed in the samples with the carbon to zirconium ratios of 1:6 and 1:9 and the holding time of 90 min. By increasing the heat treatment time, the average size of ZrC particles increased from 130 to 180 nm and the size of crystallites increased from 36 to 46 nm.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"6 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.10197","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139608572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ceramic compositions for 5G devices containing niobium: A survey","authors":"Reginaldo Muccillo,&nbsp;Eliana N. S. Muccillo","doi":"10.1002/ces2.10201","DOIUrl":"10.1002/ces2.10201","url":null,"abstract":"<p>The main dielectric properties of several ceramic materials having niobium in their composition, proposed to take part in 5G telecommunication devices, are reviewed. A preliminary basic presentation of 5G systems, the requirements for implementing their use, a concise review of the ceramic compositions containing niobium that have been studied thus far, and an evaluation of their performance are detailed. A survey is presented, including more than 80 different compositions containing niobium, focusing on key parameters, such as dielectric constant, quality factor, temperature coefficient, and sintering temperature. These parameters play a role for assessing the potential application of these ceramics in 5G devices.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"6 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.10201","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139613653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced luminescence of a silica-nitride phosphor; La3Si6N11:Ce3+by using Cr3+-activated TiO2 nanoparticles","authors":"Ilkyaz Aydin,&nbsp;Kadriye Ertekin,&nbsp;Funda Ak Azem,&nbsp;Tulay Koc Delice,&nbsp;Isil Birlik","doi":"10.1002/ces2.10198","DOIUrl":"10.1002/ces2.10198","url":null,"abstract":"<p>Ce³⁺-activated silica nitride phosphors (lanthanum silicate-nitride [LSN]) are promising thermostable conversion components for white-light-emitting diodes, screen technologies, and other optoelectronic applications. Cr³⁺-activated TiO₂, on the other hand, is a strongly absorbing material depending on its size and optical microenvironment. In this work, we gathered Cr³⁺-doped TiO₂ and La₃Si₆N₁₁:Ce³⁺ in an optically transparent polymethylmethacrylate matrix. Photoluminescence of the binary blends of La₃Si₆N₁₁:Ce³⁺/TiO₂ and La₃Si₆N₁₁:Ce³⁺/TiO₂:Cr³⁺ has been investigated under two different excitation energies by steady-state and lifetime-based measurements, respectively. When the microscale La₃Si₆N₁₁:Ce³⁺ phosphor and nanoscale TiO₂:Cr³⁺ particles were gathered at a critical concentration, the resulting composite exhibited 3.14-fold enhancement in the emission signal intensity with respect to the additive-free phosphor. Upon excitation, the La₃Si₆N₁₁:Ce³⁺–TiO₂:Cr³⁺ blend exhibited different excited-state lifetimes for the nano- and microsecond time-scales compared to the LSN. The microsecond time-scale measurements performed under 378 nm excitation supported the existence of a potential energy transfer from the TiO₂:Cr³⁺ to the La₃Si₆N₁₁:Ce³⁺.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.10198","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139445718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanofatigue of supercrystalline nanocomposites","authors":"Cong Yan,&nbsp;Diletta Giuntini","doi":"10.1002/ces2.10199","DOIUrl":"10.1002/ces2.10199","url":null,"abstract":"<p>Supercrystalline nanocomposites (SCNCs) are a new category of hybrid materials consisting of inorganic nanoparticles surface-functionalized with organic ligands and with periodic nanostructures, featuring multi-functionality and able to reach exceptional mechanical properties. Although efforts have been made to explore their mechanical behavior, their response to cyclic loading remains to be unveiled. Here, the fatigue behavior of SCNCs with different degrees of organic crosslinking is investigated via nanoindentation. The nanocomposites’ fatigue life is assessed, and it emerges that SCNCs without crosslinking are more efficient in dissipating energy under cyclic loading and thus feature a longer fatigue life. Chipping is identified as the main fatigue failure mechanism, whereas different mechanisms, intrinsic or extrinsic, dominate in the indentation depth propagation, again depending on crosslinking.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.10199","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139380508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Zirconia-containing glass-ceramics: From nucleating agent to primary crystalline phase","authors":"Adam Shearer,&nbsp;Maziar Montazerian,&nbsp;Binghui Deng,&nbsp;Jessica J. Sly,&nbsp;John C. Mauro","doi":"10.1002/ces2.10200","DOIUrl":"10.1002/ces2.10200","url":null,"abstract":"<p>This article reviews promising studies on the design, manufacturing, microstructure, properties, and applications of glass-ceramics containing ZrO₂ and relevant glass-ceramic matrix composites. After the addition of ZrO₂ to a glass-ceramic composition, it can persist in the residual glassy phase, facilitate nucleation, and/or precipitate as ZrO₂ or another zirconate crystalline phase. Also, ZrO₂-reinforced or ZrO₂-toughened glass-ceramics can be designed as composites. In this article, the term “ZrO₂-containing glass-ceramics” encompasses all these scenarios in which ZrO₂ is present. Such glass-ceramics offer a wide range of applications in modern industries, including but not limited to architecture, optics, dentistry, medicine, and energy. Since S. Donald Stookey's discovery of glass-ceramics in the early 1950s, the most important scientific efforts reported in the literature are reviewed. ZrO₂ is commonly added to glass-ceramics to promote nucleation. As a result, the role of ZrO₂ in structural modification of residual glass and stimulating the nucleation in glass-ceramic is first discussed. ZrO₂ can also be designed into the main crystalline phase of glass-ceramics, contributing achieving super high fracture toughness above 4 MPa·m^0.5. Experimental and computational studies are reviewed in detail to elucidate how the transformation toughening and other mechanisms help to achieve such high values of fracture toughness. Sintered and glass-ceramic matrix composites also show promise, where ZrO₂ contributes to improved stability and mechanical properties. Finally, we hope this article will provoke interest in glass-ceramic materials in both the scientific and industrial communities so that their tremendous technological potential in developing, for example, tough, thermally stable, transparent, and biologically compatible materials can be realized more widely.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"6 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.10200","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139385818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanical property—processing relations for SiC foams synthesized via polymer particle templating of polycarbosilane","authors":"Christopher T. Kassner,&nbsp;Haydn N. G. Wadley","doi":"10.1002/ces2.10196","DOIUrl":"10.1002/ces2.10196","url":null,"abstract":"<p>Silicon carbide foams with an average pore diameter of 650 nm and an inter-pore ligament thickness of 150 nm have been synthesized using spherical polymethylmethacrylate (PMMA) particle templating of a β-SiC nanoparticle-loaded polycarbosilane (PCS) preceramic polymer and the effect of crystallization temperature upon their microstructure and mechanical properties investigated. Differential scanning calorimetry and thermogravimetric analysis were used to investigate both the kinetics of PMMA decomposition and the influence of β-SiC nanoparticles upon the mechanisms of PCS cure, pyrolysis, and partial crystallization. As the crystallization temperature was systematically increased, the inter-pore ligament structure coarsened and nanopores developed within the ligaments between the β-SiC nanoparticles. The foam's Young's modulus and compressive strength at first increased with crystallization temperature, reaching a maximum after processing at 1300˚C. However, further increases in temperature resulted in a rapid fall in both foam modulus and compressive strength. To gain insight into the fundamental processes responsible for the overall (macroscale) mechanical properties, models for open/closed cell foams were inverted and used in conjunction with the measured foam density, Young's modulus, and compressive strength to estimate the mechanical properties of the inter-pore ligaments. This procedure indicated that changes to the ligament properties were responsible for the observed dependence of the foam mechanical properties upon crystallization temperature.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.10196","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139169397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Failure location effects on slow crack growth parameter estimates","authors":"Jonathan Salem,&nbsp;Pappu L. N. Murthy","doi":"10.1002/ces2.10195","DOIUrl":"10.1002/ces2.10195","url":null,"abstract":"<p>As part of Roman Space Telescope component development, the slow crack growth (SCG) parameters of a glass were measured using constant stress rate testing of ASTM C1161 beams. Failures occurred on the faces, bevels and sides of the test specimens thereby providing an opportunity to examine the effects of failure location on SCG parameter estimates. Censoring of the data by location did not have a statistically significant effect on the slow crack growth parameter estimates. Linear and nonlinear fits were also made to various strength estimators. Nonlinear fits gave slightly lower estimates of the parameters. The main influence on parameter estimates was a low strength, infrequent flaw population. Exponential model parameters were estimated via swarm optimization.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.10195","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138606887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Setting behavior and mechanical properties of geopolymers from fly ash and real construction waste","authors":"Felix Kugler,&nbsp;Wolfgang Krcmar,&nbsp;Ulrich Teipel","doi":"10.1002/ces2.10193","DOIUrl":"10.1002/ces2.10193","url":null,"abstract":"<p>Sustainability is becoming an increasingly important factor in the development of new building materials. In terms of the sustainability of concrete components, the biggest challenge is the high energy consumption and associated greenhouse gas emissions in the production of Portland cement. A common strategy used by the construction industry to improve sustainability is to use residuals to develop lower-emission geopolymer concretes that eliminate high-emission cement-based concretes. Because construction and demolition waste, at 3 trillion tons per year worldwide, also represents an environmental risk, this work will investigate the suitability of geopolymers based on real construction waste. In the course of the investigations, the manufactured geopolymer samples are examined for the material parameters relevant to building materials, namely compressive strength, flexural strength, raw density, total porosity, and thermal conductivity. The setting behavior and the forming structures are investigated by infrared spectroscopy, X-ray diffraction analysis and scanning electron microscopy. The present study is intended to contribute to the development of a suitable recycling strategy for the material recycling of construction waste in novel geopolymer material.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.10193","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135393297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Perspectives on the impact of crystallization in bioactive glasses and glass-ceramics","authors":"Maziar Montazerian,&nbsp;Adam Shearer,&nbsp;John C. Mauro","doi":"10.1002/ces2.10194","DOIUrl":"10.1002/ces2.10194","url":null,"abstract":"<p>Both unwanted and induced crystallization can impact bioactivity, physical and mechanical properties of bioactive glasses (BGs). Uncontrolled crystallization has negative consequences, rendering BGs unreliable. However, by manipulating the type, size, shape, and quantity of crystals in BGs, plenty of opportunities arise for controlling, for example, mechanical properties and degradability, leading to unique applications and improved performance. Understanding crystallization is a key step in developing bioactive glasses and glass-ceramics (BGCs), and both fundamental and experimental research can aid in the design of BGCs for processing and biological function. In this perspective, we discuss the sources of crystallization and how controlled crystallization facilitates the functionalization of bioactive scaffolds, hybrids, coatings, composites, cements, and fibers.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.10194","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135475237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photoluminescent and photocatalytic properties of Cu2+ and Mg2+-doped ZnO nanoparticles obtained by a facile sonochemical method","authors":"I. A. Bezerra Neta,&nbsp;N. F. Andrade Neto,&nbsp;J. M. P. Silva,&nbsp;M. D. Teodoro,&nbsp;M. R. D. Bomio,&nbsp;F. V. Motta","doi":"10.1002/ces2.10192","DOIUrl":"10.1002/ces2.10192","url":null,"abstract":"<p>Pure ZnO particles, doped and co-doped with Cu²⁺ and Mg²⁺ ions, were obtained by the simple sonochemical method. The wurtzite hexagonal structure was confirmed by X-ray diffraction (XRD) patterns. The images obtained by field emission scanning electron microscopy (FE-SEM) showed irregular and more agglomerated particles with the increase of Cu²⁺ and Mg²⁺ ions concentration in the ZnO lattice, with the average diameter of particles in the range of 57.23–170.77 nm. The photocatalytic activity was investigated by decolorizing the methylene blue (MB) dye under ultraviolet C (UVC) light irradiation which indicates that 1% Mg-doped ZnO particles have better the photocatalytic activity than the other samples, and presented the highest kinetic constant value. The co-doped samples showed a reduced global surface area which did not favor the good photocatalytic performance. The sacrificial agents showed that OH• radicals are the main species involved in the photocatalytic activity of this system and defects generated in the ZnO lattice promoted photoluminescent emission in the red and green regions.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"5 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ceramics.onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.10192","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134884994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}