Open Ceramics最新文献

{"title":"Eco-friendly synthesis of selenium nanoparticles using Cuminum cyminum L extract: Evaluating their cytotoxicity, antimicrobial properties, and photocatalytic efficiency","authors":"Fatemeh Nazarzadeh ,&nbsp;Saied Navabpour ,&nbsp;Zahra Sabouri ,&nbsp;Majid Darroudi","doi":"10.1016/j.oceram.2025.100809","DOIUrl":"10.1016/j.oceram.2025.100809","url":null,"abstract":"<div><div>In this study, selenium nanoparticles (Se-NPs) were synthesized through a sustainable and eco-friendly method utilizing <em>Cuminum cyminum</em> L. (cumin) extract. The bioactive compounds in the extract act as natural reducing agents and stabilizers. The morphological, optical, and functional attributes of Se-NPs were analyzed with a focus on their photocatalytic applications, cytotoxicity, and antimicrobial activities. UV–Vis, XRD, and TEM analyses confirmed that Se-NPs were mainly amorphous with a spherical shape. The photocatalytic evaluation showed that Se-NPs effectively degraded organic dyes when exposed to UV light, highlighting their potential for environmental purification. The MTT assay evaluated the potential cytotoxicity of Se-NPs toward the cancerous CT26 cells and showed targeted anticancer activity with an IC₅₀ value of 309.9 µg/mL after 48 h. The agar diffusion approach was used to study the bactericidal effects of Se-NPs against <em>Escherichia coli</em> and <em>Staphylococcus aureus</em>; the appearance of clear inhibitory zones confirmed the antimicrobial properties of Se-NPs.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"23 ","pages":"Article 100809"},"PeriodicalIF":2.9,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144290826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of carbon presence on the strontium hexaferrite phase decomposition during pressureless spark plasma sintering (pSPS)","authors":"A. Učakar ,&nbsp;A. Kocjan ,&nbsp;B. Belec ,&nbsp;J. Košir ,&nbsp;T. Kallio ,&nbsp;M. Kržmanc Maček ,&nbsp;B. Arah ,&nbsp;P. Jenuš Belec","doi":"10.1016/j.oceram.2025.100804","DOIUrl":"10.1016/j.oceram.2025.100804","url":null,"abstract":"<div><div>The phase composition and microstructure of Sr-hexaferrite (SFO) ceramics govern the hard magnetic properties. Here, pressureless spark plasma sintering (pSPS) technique was employed for the rapid consolidation (500 °C/min) of SFO in a radiating graphite crucible under vacuum and, thus, reductive conditions. A numerical model depicting the temperature profile within the heating crucible was constructed to understand the temperature evolution within the samples. The combination pSPS sintering environment (graphite heating crucible under vacuum) promoted phase decomposition to Sr-enriched and depleted phases of various morphological variations, leading to reduction of hard magnetic properties. Notably, certain newly formed phases exhibited lower melting points, inducing a shift in the sintering mechanism from solid-state sintering to a partial liquid-phase sintering mechanism.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"23 ","pages":"Article 100804"},"PeriodicalIF":2.9,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monitoring the stability of therapeutic ions in SBF","authors":"H. Kaňková ,&nbsp;A. Švančárková ,&nbsp;L. Buňová ,&nbsp;D. Galusek ,&nbsp;D. Galusková","doi":"10.1016/j.oceram.2025.100777","DOIUrl":"10.1016/j.oceram.2025.100777","url":null,"abstract":"<div><div>For the assessment of potentially bioactive materials, in vitro tests are performed in simulating body fluid (SBF) to prove its hydroxyapatite-forming ability and its biodegradability based on ions released into the solution. Information on ion release is essential for understanding the biological activity of both the ions and the materials as a whole. To understand these processes, it is important to accurately determine the concentration of elements in a complex SBF matrix. Most published studies are not performed consistently, do not take into account the specifics of the method, and possible interactions, or do not provide information on the protocols applied to achieve stability of the solutions analysed. In our study, we performed model experiments aimed at verifying the determination of ions in SBF when the sample is and is not suitably treated for its storage.</div><div>The first experiment investigated the simulation of the long-term stability of ions in SBF samples collected after in vitro test of apatite formation (often incorrectly stated as bioactivity test). SBF solutions were spiked with Al, B, Ce, Cu, Ga, Sr, Y, and Zn at 0.5, 2.5, and 10 mg/L concentrations and determined within 1 h. The concentration of spiked solutions was analyzed again after 7 and 14 days. Elemental recovery was evaluated in comparison with solutions containing the same amounts of these elements but treated with nitric acid to achieve pH ∼ 2. The second experiment focused on stratifying the ion concentrations in the tubes during the ICP-OES measurement. The difference between the analysis performed immediately after the addition of the elements of interest to the solution and the analysis performed 3 h later was determined in the three positions of the tubes.The changes in the measured concentration significantly different than the nominal values for the Al, Ce, Y, and Zn were detected. If the concentration of these ions decreases, phosphorus and calcium have been removed from the solution and vice versa. This indicates that these ions get trapped in the precipitates and complexes formed. A protocol of recommended sample handling procedures was developed to avoid potential errors and inconsistencies when storing the SBF sample after leaching tests (also known as ion release test) before ICP-OES analysis.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100777"},"PeriodicalIF":2.9,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mineralogical and microstructural changes in fused cast Ti-stabilized alumina-zirconia eutectic ceramics at elevated temperatures","authors":"Annalena Erlacher ,&nbsp;Adrian Villalba Weinberg ,&nbsp;Christian L. Lengauer ,&nbsp;Andreas Börger","doi":"10.1016/j.oceram.2025.100798","DOIUrl":"10.1016/j.oceram.2025.100798","url":null,"abstract":"<div><div>Ti-stabilized alumina-zirconia eutectic ceramics produced by fusion-casting are characterized to investigate microstructural mechanisms at elevated temperatures and to explain the self-sharpening effect. Scanning electron microscopy (SEM) images show fine-grained lamellar eutectic microstructures with well-defined domains. After thermal annealing at 800 °C, distinct cracks formed along the domain boundaries. Thermal analyses and powder X-ray diffraction (pXRD), using Rietveld evaluation, confirmed that the cracks are triggered by the phase transformation from meta-stable tetragonal to monoclinic ZrO₂, causing a volume increase of up to 13.4 %. This indicates a decrease in the stabilizing effect of Ti in the meta-stable tetragonal ZrO₂ starting from 669 °C, and subsequently triggering the phase transformation. Additionally, structural analysis of pXRD data reveals internal stresses within the crystal lattice, showing expansion of tetragonal ZrO₂ along the <em>c</em>-axis and distortions in the basal plane in both tetragonal and monoclinic ZrO₂.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100798"},"PeriodicalIF":2.9,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144184740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Co–extrusion of alumina core–shell structures fabricated by robocasting","authors":"Michelle Weichelt ,&nbsp;Larissa Wahl ,&nbsp;Nahum Travitzky ,&nbsp;Tobias Fey","doi":"10.1016/j.oceram.2025.100805","DOIUrl":"10.1016/j.oceram.2025.100805","url":null,"abstract":"<div><div>Porous ceramics have a wide range of applications regarding their exceptional structural and specific mechanical properties, such as adjustable permeability, high surface area, and high specific strength. To enhance the compressive strength of porous alumina further, core-shell structures with a dense core and porous shell were produced by combining co-extrusion and robocasting. Different amounts of spherical cellulose particles were added to the paste and subsequently burned out from the printed green bodies to obtain porous alumina. This leads to a porosity ranging from 18 % to 55 % in the samples, whereas the dense alumina shows a porosity of ∼2 %. Two different core-shell ratios were realized to investigate the influence of the dense core on the properties. The core-shell samples were characterized in terms of their porosity using the rule of mixture. The compressive strength of the fabricated structures was investigated and compared to the theoretical strength of porous samples without a dense core. The theoretical strength of porous reference samples was calculated using an empirical exponential expression. A novel approach to structurally reinforce highly porous ceramics was demonstrated by incorporating the dense core. With a porosity of 20 %, the core-shell structures have an average compressive strength of ∼850 MPa. The macrostructure and microstructure of the core-shell samples were investigated using SEM and µCT imaging. This leads to a lower failure of the structure under mechanical load and thus extends the range of possible applications.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"23 ","pages":"Article 100805"},"PeriodicalIF":2.9,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144288965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Porous polymer-derived ceramics for environmental applications: Sorption, filtration, and catalysis","authors":"Oyku Icin ,&nbsp;Damla Zeydanlı ,&nbsp;Mattia Biesuz ,&nbsp;Gian Domenico Sorarù ,&nbsp;Cekdar Vakifahmetoglu","doi":"10.1016/j.oceram.2025.100803","DOIUrl":"10.1016/j.oceram.2025.100803","url":null,"abstract":"<div><div>Polymer-derived ceramics (PDCs), obtained from preceramic polymers, have emerged as promising materials for environmental applications due to their high thermal and chemical stability, tunable nano-microstrucure and porosity, and versatile surface functionalities. This review focuses on the recent advances in porous PDCs and their use in key environmental fields such as sorption, filtration, and catalysis. A comparative analysis of precursor chemistry, synthesis strategies, and resulting structural properties is presented, emphasizing how these factors influence performance in environmental remediation tasks. By consolidating findings across specific application areas, the work aims to clarify the functional potential of PDCs and identify current research gaps and opportunities for future development in environmental material science.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"23 ","pages":"Article 100803"},"PeriodicalIF":2.9,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of 3D printing process: Optimization, quality analysis, and comparison of 3D printed and cast ceramic properties","authors":"Adam Boleslavský ,&nbsp;Hana Ovčačíková ,&nbsp;Milan Mihola ,&nbsp;Aki Mikkola ,&nbsp;Michaela Topinková ,&nbsp;Zdenko Bobovský","doi":"10.1016/j.oceram.2025.100797","DOIUrl":"10.1016/j.oceram.2025.100797","url":null,"abstract":"<div><div>The goal of this study was to optimize and validate the procedures and methods used to form ceramic objects using 3D-print molding instead of cast molding. Chamotte refractory clay was shaped into 5 x 5 x 5 cm cubes using both the 3D-print-molding and cast-molding methods. These cubes were then evaluated, fired, and evaluated again. The 3D-print molding method used was an adaptation of ’direct ink writing’. Since refractory clay dries during manufacturing, a Photoneo 3D scanner was used to monitor cube shrinkage before firing. Other basic properties such as mineralogical composition, evaluated via X-ray diffraction, were also measured. X-ray fluorescence spectroscopy determined chemical composition. After firing, compressive strength, bulk density, porosity, and water absorption were measured and structural aspects such as cracking and porosity were evaluated. The 3D-print molding of the chamotte clay was largely successful. The measured compressive strength of the fired 3D-print-molded and cast-molded ceramic cubes was 31.4 MPa and 30.4 MPa, respectively. The 3D-print-molded ceramic parts were slightly more porous (14.5%) and absorptive (7.1%). Total volumetric shrinkage was 36 %. Detailed cross-sectional analysis of the samples identified defects related to specific shortcomings of both molding methods. This information suggests areas that could be targeted for refinement. Addressing them could lead to significant advancements, allowing 3D-print-molded ceramics and similar materials to achieve superior properties compared to conventional manufacturing methods.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"23 ","pages":"Article 100797"},"PeriodicalIF":2.9,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144243296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of in vitro bioactivity, cytotoxicity, and neurogenic characteristics of spray-dried Al-doped bioactive glass","authors":"Frizka Vietanti,&nbsp;Yuan-Jie Lee,&nbsp;Yu-Jen Chou","doi":"10.1016/j.oceram.2025.100801","DOIUrl":"10.1016/j.oceram.2025.100801","url":null,"abstract":"<div><div>Due to advancements in bioceramics, bioactive glasses (BGs) are increasingly acknowledged as viable options in the domains of tissue and bone engineering, owing to their excellent characteristics such as non-toxicity, bioactivity, and biocompatibility. Nevertheless, the use of these materials is limited due to a lack of inherent neurogenic properties. To mitigate this limitation, we aimed to investigate the synthesis and properties of undoped and Al-doped 58S bioactive glass (BG) prepared via spray drying and focused on evaluating the impact of Al dopant concentration (5, 10, and 15 mol %) on their structure, morphology, bioactivity, cytotoxicity, and neurogenic characteristics. The results confirm the amorphous nature of both undoped and Al-doped BG microspheres while revealing a shift in morphology from smooth spherical particles to concave spheres with higher Al concentrations, along with their formation mechanism discussed. In addition, <em>in vitro</em> bioactivity, evaluated by immersing the specimens in simulated body fluid, demonstrates a decrease in hydroxyapatite formation with increasing Al content, while cytotoxicity indicated that all specimens are non-toxic, with Al doping even exhibiting a slight enhancement in cell viability. These findings provide valuable insights into the potential of Al-doped 58S BG microspheres for biomedical applications.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100801"},"PeriodicalIF":2.9,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advances in chemically tailored metal alkoxide as single-source precursors for engineered oxide nanostructures","authors":"Ajay Saini ,&nbsp;Dalip Singh ,&nbsp;Pushpendra Kumar ,&nbsp;K.K. Nagaraja","doi":"10.1016/j.oceram.2025.100800","DOIUrl":"10.1016/j.oceram.2025.100800","url":null,"abstract":"<div><div>Metal oxide nanostructures are of significant importance in several fields such as chemistry, physics, and materials science due to their diverse range of practical applications. Oxides are extensively utilized in various technical applications, including the production of sensors, piezoelectric devices, microelectronic circuits, coatings, catalysts, and solar cells. Owing to their small size, oxide nanoparticles exhibit special physical and chemical characteristics. The utilization of the single-source precursor technique exhibits potential as a viable method for the synthesis of nanoscale materials. However, its successful implementation necessitates the availability of appropriately customized precursors. Chemically altered metal/hetero-metal alkoxides exhibit promise as viable precursor materials for the fabrication of pristine metal/hetero-metal oxides at the nanoscale. These precursors have significant potential for the synthesis of new materials due to their ability to regulate precursor reactivity in sol-gel and spray pyrolysis processes, as well as facilitate the production of inorganic-organic hybrid materials. Microstructures ranging from nano-rods (∼100 nm) to nanowires of SnO₂ have been realized using the sol-gel method and have generated nano-alumina (Al₂O₃) particle sizes ranging from 30 nm to 7 nm, depending on the degree of modification. The modification of alkoxides can be achieved by the exchange of alkoxy groups with chelating ligands, such as Schiff's bases, oximes, glycols, carboxylic acids, and other similar compounds. The chelating ligands in question exert their influence on the alkoxide precursor at a molecular level, so altering the hydrolysis-condensation process as a whole. Consequently, they serve as agents that direct the structure and govern the size of the resulting product.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100800"},"PeriodicalIF":2.9,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144105429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and characterization of hydroxyapatite-based nanocomposite coating with alginate biopolymer and MgO nanoparticles for enhanced antibacterial Properties","authors":"Mohammad Moslem Imani ,&nbsp;Parya Fatahi ,&nbsp;Amin Golshah ,&nbsp;Mohammad Salmani Mobarakeh ,&nbsp;Mohsen Safaei","doi":"10.1016/j.oceram.2025.100799","DOIUrl":"10.1016/j.oceram.2025.100799","url":null,"abstract":"<div><div>The objective of this study is to identify the ideal conditions for fabricating hydroxyapatite/alginate/MgO nanocomposite with potent antibacterial. The Taguchi approach was used to investigate the production of nanocomposites with the outstanding antibacterial properties. Three factors were studied at three levels, resulting in nine unique experiments. Characteristics such as surface appearance, chemical composition, elemental dispersion, thermal analysis and crystal structure were all evaluated. The findings showed that MgO nanoparticles and alginate biopolymer were evenly distributed throughout the hydroxyapatite matrix. The nanocomposite produced under experimental conditions 3 (0.03 M hydroxyapatite, 0.04 M alginate, and 0.08 M MgO) showed the strongest impact in inhibiting the growth of <em>Streptococcus mutans</em> at 1.84 Log₁₀ CFU/ml. This study illustrated that the fabricated nanocomposite had a stable performance under ideal conditions and the use of appropriate levels of components enhance the antibacterial activity of the fabricated nanocomposite.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100799"},"PeriodicalIF":2.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}