Open Ceramics最新文献_第4页

Sinter-joining of two different bioceramic materials 两种不同生物陶瓷材料的烧结连接

IF 2.9

Open Ceramics Pub Date : 2025-02-26 DOI: 10.1016/j.oceram.2025.100759

Sarah Nistler , Christoph Hofstetter , Stefan Baudis , Martin Schwentenwein , Jürgen Stampfl

引用次数: 0

Green binder system for taphole clays: A potential for glycerine and phenolic resin 洞口粘土的绿色粘合剂系统：甘油和酚醛树脂的潜力

IF 2.9

Open Ceramics Pub Date : 2025-02-25 DOI: 10.1016/j.oceram.2025.100758

I.J-P. Cameron , A.M. Garbers-Craig

引用次数: 0

Investigation of resin composition and printing parameters on the dimensional accuracy of alumina components fabricated via ceramic vat photopolymerization 树脂组成及印刷参数对陶瓷还原光聚合法制备氧化铝部件尺寸精度的影响

IF 2.9

Open Ceramics Pub Date : 2025-02-23 DOI: 10.1016/j.oceram.2025.100751

Piie Konnunaho, Setareh Zakeri, Erkka J. Frankberg, Erkki Levänen

{"title":"Investigation of resin composition and printing parameters on the dimensional accuracy of alumina components fabricated via ceramic vat photopolymerization","authors":"Piie Konnunaho, Setareh Zakeri, Erkka J. Frankberg, Erkki Levänen","doi":"10.1016/j.oceram.2025.100751","DOIUrl":"10.1016/j.oceram.2025.100751","url":null,"abstract":"<div><div>Dimensional accuracy in ceramic vat photopolymerization is influenced by broadening, where cured regions exceed intended exposure areas due to light scattering in the ceramic resin. This study evaluates how printing parameters (exposure time and peel-off speed) and resin composition (photoinitiator type and concentration, and dye type and concentration) affect the accuracy of negative (e.g., holes) and positive (e.g., pillars) features of varying sizes (0.45 mm). Results showed that feature size influences accuracy, with longer exposure times improving interlayer bonding but reducing resolution. Photocuring behavior aligned with the UV absorption spectra of photoinitiators and dyes. Increasing photoinitiator concentration led to higher lateral light penetration (<span><math><msub><mrow><mi>S</mi></mrow><mrow><mi>w</mi></mrow></msub></math></span>) but lower depth penetration (<span><math><msub><mrow><mi>D</mi></mrow><mrow><mi>p</mi></mrow></msub></math></span>), while increasing dye concentration resulted in reduced <span><math><msub><mrow><mi>S</mi></mrow><mrow><mi>w</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>D</mi></mrow><mrow><mi>p</mi></mrow></msub></math></span>. The findings in this study enhance the understanding of ceramic VPP, reinforcing its potential for industrial applications that require high dimensional accuracy.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100751"},"PeriodicalIF":2.9,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510479","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}

引用次数: 0

Image and numerical analyses for understanding the in vivo dissolution of partially crystalline bioactive glass S53P4 scaffolds 通过图像和数值分析了解部分结晶性生物活性玻璃S53P4支架的体内溶解

IF 2.9

Open Ceramics Pub Date : 2025-02-20 DOI: 10.1016/j.oceram.2025.100757

Laura Aalto-Setälä , Gustav Strömberg , Peter Uppstu , Robert Björkenheim , Jukka Pajarinen , Nina Lindfors , Leena Hupa

{"title":"Image and numerical analyses for understanding the in vivo dissolution of partially crystalline bioactive glass S53P4 scaffolds","authors":"Laura Aalto-Setälä , Gustav Strömberg , Peter Uppstu , Robert Björkenheim , Jukka Pajarinen , Nina Lindfors , Leena Hupa","doi":"10.1016/j.oceram.2025.100757","DOIUrl":"10.1016/j.oceram.2025.100757","url":null,"abstract":"<div><div>This work employs image and numerical analyses of SEM micrographs to understand the fate of partially crystallized S53P4 scaffolds after implantation in rabbit femurs for 2, 4, and 8 weeks. Bioactive glasses commonly used for the regeneration of bone tissue may crystallize during hot-working, which affects their dissolution. The <em>in vivo</em> degradation behavior of the scaffolds was analyzed from cross-sectional SEM images by separating surface reaction layers, unreacted glass, and ingrown bone. The partial crystallization resulted in scaffolds degrading rapidly without decreasing size, thus enabling image analysis to estimate the progress of the <em>in vivo</em> behavior. The analysis enabled numerical estimates for the dissolution of sodium and silicon from the glass scaffolds. After 56 days, 68 % of silicon and 90 % of sodium had dissolved from the original sintered scaffolds. It was estimated that if the degradation continued similarly, all sodium would dissolve within three months and silicon in eight months.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100757"},"PeriodicalIF":2.9,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510478","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}

引用次数: 0

Preparation of ZnO@ZnS core-shell nanorod arrays with enhanced photocurrent for removal of methylene blue dyes in wastewater 增强光电流制备ZnO@ZnS核壳纳米棒阵列去除废水中的亚甲基蓝染料

IF 2.9

Open Ceramics Pub Date : 2025-02-18 DOI: 10.1016/j.oceram.2025.100756

Yu-Zhe Wu, Wenjea J. Tseng

{"title":"Preparation of ZnO@ZnS core-shell nanorod arrays with enhanced photocurrent for removal of methylene blue dyes in wastewater","authors":"Yu-Zhe Wu, Wenjea J. Tseng","doi":"10.1016/j.oceram.2025.100756","DOIUrl":"10.1016/j.oceram.2025.100756","url":null,"abstract":"<div><div>This study synthesized core-shell zinc oxide@zinc sulfide nanorod arrays (ZnO@ZnS NRAs) using a hydrothermal process in a thioacetamide solution, with sulfidation temperatures ranging from 60 to 100 °C. An increased sulfidation temperature resulted in a higher ZnS fraction within the ZnO@ZnS NRAs. ZnO@ZnS NRAs prepared at 70 °C, with a ZnS ratio of approximately 70:30 by weight, exhibited the highest photocurrent density of 0.22 mA·cm<sup>−2</sup> under xenon-lamp irradiation at a bias voltage of 1.5 V (vs. Ag/AgCl). X-ray photoelectron spectroscopy, photoluminescence, and electron paramagnetic resonance analyses confirmed the presence of vacancy defects, which are believed to promote the separation of photoinduced charge carriers, thereby enhancing carrier density. The increased photocurrent facilitated the efficient photodegradation of methylene blue dye in aqueous solutions, following Langmuir-Hinshelwood kinetics for heterogeneous catalysis. The first-order rate constant for the ZnO@ZnS NRAs treated at 70 °C was double that of the pristine ZnO counterpart. The band alignment at the ZnO-ZnS interface, combined with effective electron-hole separation, contributes to the enhanced photoelectrochemical and photocatalytic activity of the ZnO@ZnS NRAs.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100756"},"PeriodicalIF":2.9,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453970","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}

引用次数: 0

Thermomechanical and thermal characterization of pressureless sintered TiB2 无压烧结TiB2的热力学和热特性

IF 2.9

Open Ceramics Pub Date : 2025-02-18 DOI: 10.1016/j.oceram.2025.100754

Simone Taraborelli , Simone Failla , Diletta Sciti , Steven M. Smith II , Jeremy Watts , William G. Fahrenholtz , Greg E. Hilmas

{"title":"Thermomechanical and thermal characterization of pressureless sintered TiB2","authors":"Simone Taraborelli , Simone Failla , Diletta Sciti , Steven M. Smith II , Jeremy Watts , William G. Fahrenholtz , Greg E. Hilmas","doi":"10.1016/j.oceram.2025.100754","DOIUrl":"10.1016/j.oceram.2025.100754","url":null,"abstract":"<div><div>The impact of high-energy milling using WC<img>Co media on the pressureless sintering and properties of TiB<sub>2</sub> was studied. After 30 mins of milling, samples sintered at 2200 °C achieved a high relative density (>98 %) and a fine mean grain size (<2 µm). In the microstructure W<sub>x</sub>B<sub>y</sub> phases, often containing Co, were observed at triple points, due to contamination from the milling media. Moreover, core-rim structures with multiple rims were detected: the cores consisted of pure TiB<sub>2</sub> grains, the rims were (Ti<sub>x</sub>W<sub>y</sub>)B<sub>2</sub> solid solutions. The core-rim formation was significantly more pronounced compared to a reference sample of the same powder mixture densified by hot pressing at 1900 °C. The hardness reached 23 GPa, comparable to the hot-pressed sample, while the fracture toughness remained within 4.8–5.1 MPa·m<sup>1/2</sup> up to 1000 °C. The strength was approximately 350–400 MPa up to 1000 °C, declining sharply at higher temperatures due to W-containing impurities. Thermal diffusivity and conductivity were similarly impacted by these impurities.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100754"},"PeriodicalIF":2.9,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453301","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}

引用次数: 0

Evaluation of Boron Carbide powder stability under accelerated aging 加速老化条件下碳化硼粉末稳定性的评价

IF 2.9

Open Ceramics Pub Date : 2025-02-17 DOI: 10.1016/j.oceram.2025.100755

Amruth Kaitheri , Johannes Ofstad , Elvia Anabela Chavez Panduro , Martin Oppegård , Sanosh Kunjalukkal Padmanabhan , Sudipto Pal , Antonio Alessandro Licciulli , Vidar Johannesen , Trygve Eidet , Kjell Wiik , Mari-Ann Einarsrud

{"title":"Evaluation of Boron Carbide powder stability under accelerated aging","authors":"Amruth Kaitheri , Johannes Ofstad , Elvia Anabela Chavez Panduro , Martin Oppegård , Sanosh Kunjalukkal Padmanabhan , Sudipto Pal , Antonio Alessandro Licciulli , Vidar Johannesen , Trygve Eidet , Kjell Wiik , Mari-Ann Einarsrud","doi":"10.1016/j.oceram.2025.100755","DOIUrl":"10.1016/j.oceram.2025.100755","url":null,"abstract":"<div><div>Boron carbide (B<sub>4</sub>C) is a hard and durable ceramic used in aerospace, nuclear reactors, ballistic protection, <em>etc</em>. The stability of B<sub>4</sub>C powders at ambient conditions has been investigated using accelerated ageing by heat treatment at 400 °C in controlled atmospheres. The degree of conversion of B<sub>4</sub>C increased in the following order: Argon (no reaction), humidified argon (∼4 %), synthetic air (∼13 %) and humidified synthetic air (∼19 %). In humidified atmosphere, the reaction product was boric acid due to cooling in the presence of humidity. The high conversion in humidified synthetic air suggests that humidity accelerates the oxidation, and a reaction mechanism is proposed to explain the enhanced rate of oxidation. It is anticipated that the observed oxidation reactions are not limited to 400 °C but will also occur at ambient temperatures. This agrees with observations of reduced quality of the B<sub>4</sub>C during storage in ambient atmosphere.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100755"},"PeriodicalIF":2.9,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480759","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}

引用次数: 0

Improved mechanical quality of ceramic vat photopolymerization prints by supercritical carbon dioxide extraction 超临界二氧化碳萃取技术改善陶瓷缸光聚合印刷品的机械质量

IF 2.9

Open Ceramics Pub Date : 2025-02-15 DOI: 10.1016/j.oceram.2025.100753

Nonna Nurmi , Erkka J. Frankberg , Arnold Ismailov , Dominique Hautcoeur , Setareh Zakeri , Essi Sarlin , Erkki Levänen

{"title":"Improved mechanical quality of ceramic vat photopolymerization prints by supercritical carbon dioxide extraction","authors":"Nonna Nurmi , Erkka J. Frankberg , Arnold Ismailov , Dominique Hautcoeur , Setareh Zakeri , Essi Sarlin , Erkki Levänen","doi":"10.1016/j.oceram.2025.100753","DOIUrl":"10.1016/j.oceram.2025.100753","url":null,"abstract":"<div><div>Vat photopolymerization (VPP) enables 3D printing of dense ceramics with complex structures, however the mandatory thermal pre-conditioning and debinding steps to remove the organic substances, can last 7 days. Supercritical carbon dioxide (scCO<sub>2</sub>) extraction was used as a pre-conditioning method to investigate if dense and sufficiently strong alumina parts can be obtained using a shorter thermal debinding cycle, due to the creation of nanosized porosity during the scCO<sub>2</sub> extraction. The mechanical properties and microstructure of the sintered alumina parts with 15 h scCO<sub>2</sub> extraction + 18 h thermal debinding were comparable to the reference with 101 h debinding, which marks a significant 67 % reduction in time. Furthermore, scCO<sub>2</sub> extraction improved the flexural strength and density, and resulted in less deviation. Thus, scCO<sub>2</sub> extraction can shorten post-processing of ceramic VPP prints and facilitate more predictable properties, which have been the two bottlenecks related to the VPP process.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100753"},"PeriodicalIF":2.9,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453972","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}

引用次数: 0

Direct ink writing of IR-transparent yttria ceramics 红外透明氧化钇陶瓷的直墨书写

IF 2.9

Open Ceramics Pub Date : 2025-02-15 DOI: 10.1016/j.oceram.2025.100752

Dariia Chernomorets , Alex Sangiorgi , Jan Hostaša

引用次数: 0

Graphene oxide membranes coated on porous ceramic hollow fibers for the removal of pharmaceutical contaminants from wastewater 在多孔陶瓷中空纤维上涂覆氧化石墨烯膜用于去除废水中的药物污染物

IF 2.9

Open Ceramics Pub Date : 2025-02-14 DOI: 10.1016/j.oceram.2025.100750

Aline Maria de Jesus Machado Cardoso, Vicelma Luiz Cardoso, Miria Hespanhol Miranda Reis

引用次数: 0