Open Ceramics最新文献_第4页

Additive manufacturing of alumina refractories by binder jetting 利用粘结剂喷射技术快速制造氧化铝耐火材料

IF 2.9

Open Ceramics Pub Date : 2024-09-07 DOI: 10.1016/j.oceram.2024.100668

Enrico Storti , Patricia Kaiser , Marc Neumann , Alban Metallari , Filippo Gobbin , Hamada Elsayed , Jana Hubálková , Paolo Colombo , Christos G. Aneziris

{"title":"Additive manufacturing of alumina refractories by binder jetting","authors":"Enrico Storti , Patricia Kaiser , Marc Neumann , Alban Metallari , Filippo Gobbin , Hamada Elsayed , Jana Hubálková , Paolo Colombo , Christos G. Aneziris","doi":"10.1016/j.oceram.2024.100668","DOIUrl":"10.1016/j.oceram.2024.100668","url":null,"abstract":"<div>In this work, refractory components based on alumina were produced by binder jetting using a large-scale 3D printer. The formulation contained several particle fractions up to a grain size of 3 mm, equal to the printer resolution. The binder system contained fine dead burnt magnesia, milled citric acid and reactive alumina, which were added to the aggregate mixture to create the powder bed. Deionized water was deposited from the printer's nozzles and triggered the binding reaction between the magnesia and citric acid. After 24 h, the printed samples were removed from the powder bed, dried and sintered at 1600 °C for 5 h. Reactive alumina contributed to the in situ creation of magnesium aluminate spinel at high temperature. The samples were characterized in terms of Young's modulus of elasticity, bending and compressive strength in 2 directions (parallel and perpendicular to the printing direction). The broken parts were used to investigate physical properties such as the open porosity and bulk density. The microstructure was studied by means of computed tomography. Finally, powder samples were used to determine the phase composition at different stages of production by means of XRD.</div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100668"},"PeriodicalIF":2.9,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666539524001329/pdfft?md5=f30e964e06ad885bb3f625983535e7aa&pid=1-s2.0-S2666539524001329-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142167984","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

Electrochemical and structural properties of binder-free iron-based bifunctional catalyst for aqueous Zinc-Oxygen batteries 锌氧水溶液电池用无粘结剂铁基双功能催化剂的电化学和结构特性

IF 2.9

Open Ceramics Pub Date : 2024-09-05 DOI: 10.1016/j.oceram.2024.100667

Jorge González-Morales , Mario Aparicio , Nataly Carolina Rosero-Navarro , Franco M. Zanotto , Alejandro A. Franco , Jadra Mosa

{"title":"Electrochemical and structural properties of binder-free iron-based bifunctional catalyst for aqueous Zinc-Oxygen batteries","authors":"Jorge González-Morales , Mario Aparicio , Nataly Carolina Rosero-Navarro , Franco M. Zanotto , Alejandro A. Franco , Jadra Mosa","doi":"10.1016/j.oceram.2024.100667","DOIUrl":"10.1016/j.oceram.2024.100667","url":null,"abstract":"<div>Global warming necessitates efficient new batteries, with Zn-O2 batteries standing out due to their high theoretical energy density, safety, and long cycle life, making them ideal for large-scale use. However, their industrial application faces challenges such as rapid energy density decline after initial cycles, limited cathode efficiency, and high overpotential between discharge and charge. This study focuses on synthesizing and characterizing ceramic iron compounds as catalysts for the cathode of Zn-O2 aqueous batteries. The findings revealed that obtained catalysts presented surface active areas beyond 220 m2/g after calcination at 800 °C, which removed organic templates. Various thermal treatments have been analysed to measure their impact on the final product. XRD, FTIR, and Raman spectroscopy confirmed sample nitridation, while SEM showed macro–meso-porosity. The electrochemical evaluation demonstrated a significant enhancement in the material's catalytic properties for ORR/OER in alkaline Zn-O2 batteries, surpassing 140 h of satable cyling with catalytic activity for ORR and OER. This improvement, coupled with optimized electrode design, resulted in a substantial increase in the batteries' operational life, achieving stable cycling for over 120 h.</div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100667"},"PeriodicalIF":2.9,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666539524001317/pdfft?md5=2b80e0bcf1617d61d336b5939367f8b0&pid=1-s2.0-S2666539524001317-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142172584","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

Characterization of hybrid silicate materials based on ceramic glazes and waste London underground dust 基于陶瓷釉料和伦敦地下废弃粉尘的混合硅酸盐材料的特性分析

IF 2.9

Open Ceramics Pub Date : 2024-09-05 DOI: 10.1016/j.oceram.2024.100664

Hana Ovčačíková , Jeffrey Stephen Miller , Vlastimil Matějka , Eva Bartoníčková , Ondřej Jankovský , Jozef Vlček

{"title":"Characterization of hybrid silicate materials based on ceramic glazes and waste London underground dust","authors":"Hana Ovčačíková , Jeffrey Stephen Miller , Vlastimil Matějka , Eva Bartoníčková , Ondřej Jankovský , Jozef Vlček","doi":"10.1016/j.oceram.2024.100664","DOIUrl":"10.1016/j.oceram.2024.100664","url":null,"abstract":"<div>In “London Underground” stations, a high concentration of dust particles containing organic and inorganic matter of varying chemical composition. “London underground dust” is created from train wheels and brakes grinding against steel tracks and collected in filtration systems. The experiment will focus on using “London Underground Dust” to colour the ceramic facing tiles intended for re-use in newly built London Underground stations. The phase composition, particle size distribution surface area, morphology, and thermal behavior of collected dust were studied by XRD, XRF, SEM-EDS, BET, heating microscopy, STA-MS, UV–VIS spectroscopy. The substrate tiles for glazing experiments were prepared from local London clay. The mixtures of glazes and collected or milled dust were sprayed on the substrate tile's surface, dried and finally fired at 1060 °C. The influence of used materials weight ratio and dust milling time were shown as crucial parameters to obtain optimal final glaze colour.</div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100664"},"PeriodicalIF":2.9,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666539524001287/pdfft?md5=09d920c053e3248fb1c0242850c30d68&pid=1-s2.0-S2666539524001287-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142172524","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

Digital light processing of rare earth oxide doped natural color zirconia denture for customized aesthetic properties 对掺杂稀土氧化物的天然色氧化锆义齿进行数字光处理，以定制美学特性

IF 2.9

Open Ceramics Pub Date : 2024-09-05 DOI: 10.1016/j.oceram.2024.100670

Shuhao Qi , Tengkuo Sun , Mi Cui , Hongyan Li , Yanlong Chen , Tao Zhou , Qin Lian , Changquan Shi , Dichen Li

{"title":"Digital light processing of rare earth oxide doped natural color zirconia denture for customized aesthetic properties","authors":"Shuhao Qi , Tengkuo Sun , Mi Cui , Hongyan Li , Yanlong Chen , Tao Zhou , Qin Lian , Changquan Shi , Dichen Li","doi":"10.1016/j.oceram.2024.100670","DOIUrl":"10.1016/j.oceram.2024.100670","url":null,"abstract":"<div>Zirconia is a ceramic material with fine properties for dental restorations, but the color of zirconia does not match natural teeth color. In this study, the effect of zirconia doped with different rare earth oxides on the color of denture manufactured by Digital Light Processing (DLP) method was investigated. Experimental results showed that the color of the ceramic parts after sintering could cover Vita 3D colorimetric plate for natural teeth, and the color accuracy was within 1.5 NBS. Meanwhile, the forming accuracy of the denture reached 67.7 μm, and the three-point bending strength was 520.32 ± 35.44–649.10 ± 42.31 MPa, which met the requirements of triple crown in dentistry. This study establishes a method to achieve colors of natural teeth using DLP technology, and the results of this study have important leading implications for the use of additive manufacturing technology to fabricate natural-color ceramic dentures for dental applications.</div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100670"},"PeriodicalIF":2.9,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666539524001342/pdfft?md5=f8a0cf291148f10491bf0110b993c473&pid=1-s2.0-S2666539524001342-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142158409","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

Influence of diamond grinding process on material removal mechanisms and surface roughness of 0/90° continuous carbon fiber reinforced ZrB2 金刚石磨削工艺对 0/90° 连续碳纤维增强 ZrB2 材料去除机制和表面粗糙度的影响

IF 2.9

Open Ceramics Pub Date : 2024-09-04 DOI: 10.1016/j.oceram.2024.100669

Achim Rösiger , Stefan Kleiner , Simon Unseld , Ralf Goller , Luca Zoli , Diletta Sciti

{"title":"Influence of diamond grinding process on material removal mechanisms and surface roughness of 0/90° continuous carbon fiber reinforced ZrB2","authors":"Achim Rösiger , Stefan Kleiner , Simon Unseld , Ralf Goller , Luca Zoli , Diletta Sciti","doi":"10.1016/j.oceram.2024.100669","DOIUrl":"10.1016/j.oceram.2024.100669","url":null,"abstract":"<div>In manufacturing of UHTCMC components machining is often one of the ultimate process steps and have then important objectives, including dimensional tolerances and surface roughness. Additionally, the prevention of any damage to high-value components is very important. In this study, the machining of 0/90°-C/ZrB2 composite is investigated to understand some fundamental mechanisms involved. Specifically, the material removal mechanisms of the heterogeneous and anisotropic material structure through scratch tests are explored. Grinding experiments are conducted to evaluate surface quality, measuring surface roughness and grinding forces. This allows an interpretation of machining induced damage mechanisms of UHTCMCs. 0/90°-C/ZrB2 shows generally brittle removal mechanisms and influence of fiber cutting direction. Scratching depth and speed influences less on damage. This was also found in the grinding experiments, where roughness remains almost constant.</div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100669"},"PeriodicalIF":2.9,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666539524001330/pdfft?md5=db75355a83591bc57c024a30802735e0&pid=1-s2.0-S2666539524001330-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142158410","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

Editorial note 编辑说明

IF 2.9

Open Ceramics Pub Date : 2024-09-01 DOI: 10.1016/j.oceram.2024.100665

引用次数: 0

Spark plasma sintering of TiC with TiAly as sintering aid: Mechanisms and microstructures 以 TiAly 为烧结助剂的火花等离子烧结 TiC：机理和微结构

IF 2.9

Open Ceramics Pub Date : 2024-09-01 DOI: 10.1016/j.oceram.2024.100661

Alessandro Rizzi , María García-Fernández , Miguel Á. Rodríguez , Emanuele De Bona , Rodrigo Moreno , Mattia Biesuz

{"title":"Spark plasma sintering of TiC with TiAly as sintering aid: Mechanisms and microstructures","authors":"Alessandro Rizzi , María García-Fernández , Miguel Á. Rodríguez , Emanuele De Bona , Rodrigo Moreno , Mattia Biesuz","doi":"10.1016/j.oceram.2024.100661","DOIUrl":"10.1016/j.oceram.2024.100661","url":null,"abstract":"<div>TiC features an interesting combination of mechanical properties, high-temperature resistance, and lightness, making it an excellent candidate for several applications in harsh environments. However, its sintering to obtain bulk components is extremely challenging. Herein, we show that titanium aluminide is a promising sintering aid for TiC (5, 10, and 20 vol% were investigated). The aluminide allows the formation of a nearly fully dense component at 1350 °C by spark plasma sintering under 80 MPa. The aluminide forms a grain boundary secondary phase that promotes the Ti diffusion: Ti from TiC can be dissolved within the TiAly at the neck center and precipitate at the neck surface, while C can easily diffuse through the TiC lattice. Higher temperatures cause the extrusion of the aluminide out of the SPS die and its reaction with oxygen impurities. The final microstructure is constituted by nearly pure TiC with isolated alumina pockets at the triple points.</div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"19 ","pages":"Article 100661"},"PeriodicalIF":2.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666539524001251/pdfft?md5=7a5a6ed789d7a41bdee1fb0b975a5fff&pid=1-s2.0-S2666539524001251-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142095816","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

IR-transparent Y2O3 ceramics: Effect of zirconia concentration on optical and mechanical properties 红外透明 Y2O3 陶瓷：氧化锆浓度对光学和机械性能的影响

IF 2.9

Open Ceramics Pub Date : 2024-08-30 DOI: 10.1016/j.oceram.2024.100666

Dariia Chernomorets , Pietro Galizia , Giacomo Zanetti , Stefano Varas , Alessandro Chiasera , Andreana Piancastelli , Roman Yavetskiy , Jan Hostaša

{"title":"IR-transparent Y2O3 ceramics: Effect of zirconia concentration on optical and mechanical properties","authors":"Dariia Chernomorets , Pietro Galizia , Giacomo Zanetti , Stefano Varas , Alessandro Chiasera , Andreana Piancastelli , Roman Yavetskiy , Jan Hostaša","doi":"10.1016/j.oceram.2024.100666","DOIUrl":"10.1016/j.oceram.2024.100666","url":null,"abstract":"<div>Y2O3 transparent ceramics with different amounts of ZrO2 were obtained by reactive vacuum sintering at a relatively low temperature of 1735 °C for 22 h. The influence of ZrO2 concentration within the 0–15 mol.% range on the microstructure, phase composition, microhardness, and optical properties of ceramics in the visible and IR ranges was investigated. SEM and XRD results indicate the absence of secondary phases in the studied concentration range, indicating the formation of single-phase solid solutions. It was shown that doping by ZrO2 considerably decreases the average grain size of ceramics, while microhardness has the opposite behaviour. 15 mol.% ZrO2-doped Y2O3 ceramics demonstrated the highest transmittance in the visible wavelength range. On the other hand, 5 and 7 mol.% ZrO2-doped Y2O3 could be considered promising materials for the first atmospheric window (3–5 μm).</div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100666"},"PeriodicalIF":2.9,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666539524001305/pdfft?md5=b98bdfee0e83f89cd091a7e7773eeefc&pid=1-s2.0-S2666539524001305-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142152043","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

Transparent Tb2Ti2O7 ceramics for use in Faraday isolators 用于法拉第隔离器的透明 Tb2Ti2O7 陶瓷

IF 2.9

Open Ceramics Pub Date : 2024-08-26 DOI: 10.1016/j.oceram.2024.100662

I.L. Snetkov , K.V. Sidorenko , O.V. Palashov , Lixuan Zhang , Jiang Li

{"title":"Transparent Tb2Ti2O7 ceramics for use in Faraday isolators","authors":"I.L. Snetkov , K.V. Sidorenko , O.V. Palashov , Lixuan Zhang , Jiang Li","doi":"10.1016/j.oceram.2024.100662","DOIUrl":"10.1016/j.oceram.2024.100662","url":null,"abstract":"<div>Magneto-optical and thermo-optical characteristics of transparent Tb2Ti2O7 ceramics were investigated. The dependence of the index of refraction on the wavelength in the 0.29–2 μm range, the wavelength and temperature dependence of the Verdet constant, as well as the dependence of thermally induced depolarization on laser radiation power were measured. The value of the Verdet constant in Tb2Ti2O7 surpasses that in Tb3Ga5O12 by more than 1.68 times. The thermo-optical characteristic Qeff was estimated to be (1.8–3.7)∙10−8 1/K, which is record small compared to Qeff of the known magneto-optical materials. The small value of Qeff makes Tb2Ti2O7 a highly promising magneto-optical material for Faraday isolators and rotators for high average power lasers.</div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"19 ","pages":"Article 100662"},"PeriodicalIF":2.9,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666539524001263/pdfft?md5=775e35a996d4f22e9cbb78da70d0c3de&pid=1-s2.0-S2666539524001263-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142076700","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

Improving properties of boron carbide (B4C) with silicon doping and titanium diboride addition 通过掺硅和添加二硼化钛（Titanium diboride）改善碳化硼（B4C）的性能

IF 2.9

Open Ceramics Pub Date : 2024-08-24 DOI: 10.1016/j.oceram.2024.100663

Zeynep Ayguzer Yasar , Andrew Pereira , Richard A. Haber

{"title":"Improving properties of boron carbide (B4C) with silicon doping and titanium diboride addition","authors":"Zeynep Ayguzer Yasar , Andrew Pereira , Richard A. Haber","doi":"10.1016/j.oceram.2024.100663","DOIUrl":"10.1016/j.oceram.2024.100663","url":null,"abstract":"<div>In this research, B4C-TiB2 composites were successfully fabricated via the spark plasma sintering method. First, the TiB2 source effect on the B4C-TiB2 composites was investigated using commercially available TiB2 and in-house synthesized TiB2. Subsequently, the effect of Si/B co-doped B4C on composite ceramics was studied, followed by examining the samples' microstructure and elastic and mechanical properties. The results showed that B4C-TiB2 composites made with in-house TiB2 powder obtained higher relative density and more desirable elastic and mechanical properties than samples made with commercial TiB2. In-house TiB2 and Si/B-B4C composites provided more properties improvement overall. The elastic modulus, Vickers hardness, and fracture toughness values of Si/B co-doped samples were 493 GPa, 30.09 ± 1.97 GPa, and 4.31 ± 0.74 MPa m1/2, respectively. Additionally, the amorphization of the TiB2-B4C composite decreased with Si/B co-doping.</div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"19 ","pages":"Article 100663"},"PeriodicalIF":2.9,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666539524001275/pdfft?md5=8a180004cc2a0089f234f3e919fcb439&pid=1-s2.0-S2666539524001275-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142083486","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