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Influence of annealing temperature on the photocatalytic efficiency of sol-gel dip-coated ZnO thin films in methyl orange degradation 退火温度对溶胶-凝胶浸渍ZnO薄膜光催化降解甲基橙效率的影响
IF 2.9
Open Ceramics Pub Date : 2024-12-13 DOI: 10.1016/j.oceram.2024.100727
A.H. Haritha , M.E. Cruz , O. Sisman , A. Duran , D. Galusek , J.J. Velázquez , Y. Castro
{"title":"Influence of annealing temperature on the photocatalytic efficiency of sol-gel dip-coated ZnO thin films in methyl orange degradation","authors":"A.H. Haritha ,&nbsp;M.E. Cruz ,&nbsp;O. Sisman ,&nbsp;A. Duran ,&nbsp;D. Galusek ,&nbsp;J.J. Velázquez ,&nbsp;Y. Castro","doi":"10.1016/j.oceram.2024.100727","DOIUrl":"10.1016/j.oceram.2024.100727","url":null,"abstract":"<div><div>ZnO thin films on glass substrates and silicon wafers were prepared by the sol-gel dipcoating technique and annealed at temperatures ranging from 300 - 550 °C. X-ray diffraction (XRD) and Raman analysis confirm the hexagonal wurtzite structure of ZnO. Scanning electron microscopy (SEM) examination confirmed that the films were homogeneous, crack-free and with a uniform distribution of nano-sized spherical grains. The decomposition of methyl orange (MO) using a solar simulator was used to determine the photocatalytic activity of the thin films. The annealing temperature was found to have a significant influence on the structure, morphology, and photocatalytic performance of ZnO thin films. The best photocatalytic activity under solar irradiation was shown by the ZnO thin film annealed at 450 °C. The enhanced photocatalytic performance of the films can be attributed to their optimized crystallinity, surface roughness and morphology, which provide more active sites for the photocatalytic reactions.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100727"},"PeriodicalIF":2.9,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159383","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 the binder composition on the water debinding properties of a PVB-PEG-alumina feedstock for the fused deposition of ceramic process 粘结剂组成对熔融沉积陶瓷用pvb - peg -氧化铝原料水脱粘性能的影响
IF 2.9
Open Ceramics Pub Date : 2024-12-11 DOI: 10.1016/j.oceram.2024.100728
Thomas Heim , Frank Kern , Cristina Siligardi
{"title":"Influence of the binder composition on the water debinding properties of a PVB-PEG-alumina feedstock for the fused deposition of ceramic process","authors":"Thomas Heim ,&nbsp;Frank Kern ,&nbsp;Cristina Siligardi","doi":"10.1016/j.oceram.2024.100728","DOIUrl":"10.1016/j.oceram.2024.100728","url":null,"abstract":"<div><div>The study investigates the influence of several binder compositions on the solvent debinding characteristics of highly filled thermoplastic alumina feedstocks at different temperatures. All feedstocks contain the same powder volume fraction but vary in the repartition of the binder components: polyvinyl butyral (PVB), polyethylene glycol (PEG), and a plasticizer (3G8). The weight loss, debinding speed, volumetric changes, and the microstructure were analyzed. The water temperature was set to room temperature –RT– (23°C) and 40°C. SEM micrographs were taken on as-processed and solvent-debinded samples fractured after dipping in liquid nitrogen. Water debinding of the compositions with high proportions of low molecular weight components PEG and 3G8 helps to reduce the remaining polymer amount and to achieve an open porosity, which should ease the following thermal debinding.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100728"},"PeriodicalIF":2.9,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159389","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
Colors on fire: reconstructing the change of color hues in firing of experimental briquettes 燃烧时的颜色：重建实验型煤燃烧时颜色的变化
IF 2.9
Open Ceramics Pub Date : 2024-12-09 DOI: 10.1016/j.oceram.2024.100725
Vayia Xanthopoulou , Georgia Karountzou , Ioannis Iliopoulos
{"title":"Colors on fire: reconstructing the change of color hues in firing of experimental briquettes","authors":"Vayia Xanthopoulou ,&nbsp;Georgia Karountzou ,&nbsp;Ioannis Iliopoulos","doi":"10.1016/j.oceram.2024.100725","DOIUrl":"10.1016/j.oceram.2024.100725","url":null,"abstract":"<div><div>Color change is often used as a proxy for the mineralogical transformations occurring in pottery according to their firing temperature. In this study we employed the non-destructive technique of Visible Near Infrared Spectroscopy (VNIR) to obtain a quantitative color recording on fired clay briquettes. These were prepared using clayey raw materials collected from northern Peloponnese and western Greece. This material has already characterized in terms of their chemical and mineralogical composition as well as some of their physical properties. The calcareous (or non-calcareous) composition of the raw materials is well mirrored in the VNIR color recordings of the experimental briquettes. The results obtained showed that the use of VNIR provides a more accurate, and reproducible approach, which can automate color recording in ancient artefacts, enabling a higher throughput and a fast screening and grouping. This was tested by applying the method on ancient pottery and treating it as unknown samples.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100725"},"PeriodicalIF":2.9,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143160269","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
Alkaline attack of boro-alumino-silicate glass: New insights of the molecular mechanism of cold consolidation and new applications 硼铝硅酸盐玻璃的碱性侵蚀：冷固结分子机理的新认识及新应用
IF 2.9
Open Ceramics Pub Date : 2024-12-09 DOI: 10.1016/j.oceram.2024.100726
Giulia Tameni , Diana Lago , Hana Kaňková , Lenka Buňová , Jozef Kraxner , Dušan Galusek , Daniel M. Dawson , Sharon E. Ashbrook , Enrico Bernardo
{"title":"Alkaline attack of boro-alumino-silicate glass: New insights of the molecular mechanism of cold consolidation and new applications","authors":"Giulia Tameni ,&nbsp;Diana Lago ,&nbsp;Hana Kaňková ,&nbsp;Lenka Buňová ,&nbsp;Jozef Kraxner ,&nbsp;Dušan Galusek ,&nbsp;Daniel M. Dawson ,&nbsp;Sharon E. Ashbrook ,&nbsp;Enrico Bernardo","doi":"10.1016/j.oceram.2024.100726","DOIUrl":"10.1016/j.oceram.2024.100726","url":null,"abstract":"<div><div>This paper focuses on the activation of boro-alumino-silicate glass from discarded pharmaceutical containers as fine powders suspended in relatively diluted alkaline solutions (2.5 M NaOH/KOH), followed by drying at 40 °C for 7 days. A specific molecular mechanism of glass hardening is proposed. Unlike geopolymers, the hardening does not result from the condensation of products of extensive dissolution. Instead, condensation reactions occur in hydrated surface layers, leading to strong bonds (Si-O-Si, Al-O-Si, etc.) between individual glass particles. Silicates, borates, and aluminates from glass dissolution combine with alkaline ions, yielding additional soluble phases. This mechanism is supported by the results of solid-state NMR spectroscopy and elemental analysis using ICP-OES. Stable matrices prepared by direct foaming or by the inclusion of cenospheres or commercial expanded glass (Poraver®) can be exploited for the fabrication of lightweight components</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100726"},"PeriodicalIF":2.9,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143160267","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
Microstructure and thermal-mechanical evolution of high-entropy pyrochlore (A2B2O7) with dual crystalline phase 具有双晶相的高熵焦绿石（A2B2O7）的显微结构和热力学演化
IF 2.9
Open Ceramics Pub Date : 2024-12-07 DOI: 10.1016/j.oceram.2024.100723
Kun Yang , Minghao Zhao , Huan Li , Chengying Bai
{"title":"Microstructure and thermal-mechanical evolution of high-entropy pyrochlore (A2B2O7) with dual crystalline phase","authors":"Kun Yang ,&nbsp;Minghao Zhao ,&nbsp;Huan Li ,&nbsp;Chengying Bai","doi":"10.1016/j.oceram.2024.100723","DOIUrl":"10.1016/j.oceram.2024.100723","url":null,"abstract":"<div><div>Chemical complex solid solutions with dual-phases were successfully synthesized through solid-state reaction with its thermal-mechanical behavior subjected to proton irradiation were characterized. The dual-phase structural solid solutions demonstrate reduced thermal conductivity and enhanced mechanical performance, which can be associated with its chemical disorder and lattice distortion. Radiation hardening can be observed for the sample pellets with slight surface amorphization occurring, resulting in a Ti-enriched alteration layer covered on the surface.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100723"},"PeriodicalIF":2.9,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159387","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
A simple and industrially scalable process for recycling hexaferrite ceramic magnets 回收六铁氧体陶瓷磁体的简单和工业可扩展的过程
IF 2.9
Open Ceramics Pub Date : 2024-12-07 DOI: 10.1016/j.oceram.2024.100724
Alba Berja , Daniel Casaleiz , Cecilia Granados-Miralles , Karla Kosmač , Boris Saje , Tina Frangež , Slavko Dvoršak , Zoran Samardžija , Benjamin Podmiljšak , Jose Francisco Fernández , Adrián Quesada
{"title":"A simple and industrially scalable process for recycling hexaferrite ceramic magnets","authors":"Alba Berja ,&nbsp;Daniel Casaleiz ,&nbsp;Cecilia Granados-Miralles ,&nbsp;Karla Kosmač ,&nbsp;Boris Saje ,&nbsp;Tina Frangež ,&nbsp;Slavko Dvoršak ,&nbsp;Zoran Samardžija ,&nbsp;Benjamin Podmiljšak ,&nbsp;Jose Francisco Fernández ,&nbsp;Adrián Quesada","doi":"10.1016/j.oceram.2024.100724","DOIUrl":"10.1016/j.oceram.2024.100724","url":null,"abstract":"<div><div>The demand for hexaferrite (BaFe<sub>12</sub>O<sub>19</sub>/SrFe<sub>12</sub>O<sub>19</sub>) permanent magnets is expected to rise in the next 5–10 years due to their potential as a sustainable alternative to rare-earth magnets. Currently, less than 1 % of recycling of permanent magnets occurs worldwide. This study presents a successful method for recycling strontium ferrite magnets from end-of-life household appliances, fabricating recycled bonded magnets as a first step to implement a circular economy in the value chain. This industrially scalable method optimizes comminution and annealing of recovered ceramic magnets, yielding powders with particle sizes below 2 µm. Thermal treatment at 900–1000 °C recovers competitive magnetic properties. A pilot batch of recycled hexaferrite bonded magnets, produced via injection moulding, exhibited excellent mechanical and magnetic properties, with coercivity H<sub>cj</sub> of 190.1 kA/m, remanent polarization J<sub>r</sub> of 234.3 mT, and maximum energy product (<em>BH</em>)<sub>max</sub> of 10.4 kJ/m³, comparable to commercial ferrite bonded magnets.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100724"},"PeriodicalIF":2.9,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143160270","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
Negative dielectric constant and impedance analysis of novel self-generated Ti3AlC2 and Ti4AlN3 Max phase reinforced boron composites 新型自生成Ti3AlC2和Ti4AlN3 Max相增强硼复合材料的负介电常数和阻抗分析
IF 2.9
Open Ceramics Pub Date : 2024-12-06 DOI: 10.1016/j.oceram.2024.100721
Md. Shahinoor Alam , Mohammad Asaduzzaman Chowdhury , Md. Arefin Kowser , Md. Moynul Islam , M.A. Gafur , Md. Shofiqul Islam
{"title":"Negative dielectric constant and impedance analysis of novel self-generated Ti3AlC2 and Ti4AlN3 Max phase reinforced boron composites","authors":"Md. Shahinoor Alam ,&nbsp;Mohammad Asaduzzaman Chowdhury ,&nbsp;Md. Arefin Kowser ,&nbsp;Md. Moynul Islam ,&nbsp;M.A. Gafur ,&nbsp;Md. Shofiqul Islam","doi":"10.1016/j.oceram.2024.100721","DOIUrl":"10.1016/j.oceram.2024.100721","url":null,"abstract":"<div><div>In this research work, the capacitance, inductance, impedance and dielectric constant of novel self-generated Ti<sub>3</sub>AlC<sub>2</sub> and Ti<sub>4</sub>AlN<sub>3</sub> MAX phase reinforced boron composites (Ti<sub>4</sub>AlB<sub>2</sub>C and Ti<sub>4</sub>AlB<sub>2</sub>N) are studied using precision impedance analyzer. Before that, the synthesized composites were sintered at different temperatures from 950 °C to 1325 °C. In the analysis, the positive impedance is found for both the compounds. But the negative capacitance, inductance and dielectric constant are significant in all the cases, which can improve the electrical conductivity of interconnects in semiconductor circuits and lower resistive losses and ultimately can improve over all device performances.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100721"},"PeriodicalIF":2.9,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143160268","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
Mesoscale simulations of aqueous suspension-based electrophoretic coating process 基于水悬浮液的电泳涂层过程的中尺度模拟
IF 2.9
Open Ceramics Pub Date : 2024-12-05 DOI: 10.1016/j.oceram.2024.100722
Mélina Noblesse , Lisa Pin , Sandrine Duluard , Florence Ansart , Céline Merlet
{"title":"Mesoscale simulations of aqueous suspension-based electrophoretic coating process","authors":"Mélina Noblesse ,&nbsp;Lisa Pin ,&nbsp;Sandrine Duluard ,&nbsp;Florence Ansart ,&nbsp;Céline Merlet","doi":"10.1016/j.oceram.2024.100722","DOIUrl":"10.1016/j.oceram.2024.100722","url":null,"abstract":"<div><div>Electrophoretic deposition appears as a method of choice to generate coatings thanks to its ease of implementation and ability to produce deposits of relatively large thicknesses in a single step process. Research in the field has mainly focused on organic suspensions but is now moving towards suspensions in water, non-toxic and more environmentally acceptable. Here, we use Brownian molecular dynamics simulations to investigate the influence of electrophoretic deposition parameters on the properties of suspensions and deposits of mullite particles in water. We show that concentrations of particles and stabilizing ions have a large effect on inter-particle distances and electrical conductivities in the suspensions. To investigate the influence of such differences on the deposits, electrophoretic depositions with two electric fields were simulated. We demonstrate that while inter-particle distances in the deposits are much more homogenous across suspension parameters, different Debye lengths can lead to disparities in ordering (e.g. square or hexagonal).</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100722"},"PeriodicalIF":2.9,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143160273","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
Water-based 8YSZ electrolyte suspension optimised by design of experiments 通过实验设计对水基8YSZ电解质悬浮液进行了优化
IF 2.9
Open Ceramics Pub Date : 2024-12-03 DOI: 10.1016/j.oceram.2024.100717
Bernardo Jordão Moreira Sarruf , Laura Buccoli , Zoé Barbry
{"title":"Water-based 8YSZ electrolyte suspension optimised by design of experiments","authors":"Bernardo Jordão Moreira Sarruf ,&nbsp;Laura Buccoli ,&nbsp;Zoé Barbry","doi":"10.1016/j.oceram.2024.100717","DOIUrl":"10.1016/j.oceram.2024.100717","url":null,"abstract":"<div><div>Solid oxide cells are approaching commercial viability, with most of the currently used materials representing state-of-the-art advancements. However, widespread market adoption hinges on reducing costs. In this context, manufacturing improvements—particularly those that minimise material waste during production—can play a crucial role in lowering the capital expenditure (CAPEX) of solid oxide cells, ultimately influencing the levelised cost of fuel for end users.</div><div>This study presents an optimisation of electrolyte slurry formulation for tape casting. By controlling variables such as solid loading, binder content, milling parameters, and casting conditions, we achieved reproducible results in electrolyte thickness, porosity, and electrical conductivity.</div><div>The slurries were prepared by ball milling, employing a range of compositions that included both low and high solid and binder contents. The resulting rheological profiles, tape quality, thickness, and porosity were carefully evaluated. The experimental design culminated in an optimised composition, for which electrical conductivity was measured using electrochemical impedance spectroscopy. The impedance data were deconvoluted into grain bulk and grain boundary contributions, enabling further refinement of the sintering temperature and subsequent microstructure.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100717"},"PeriodicalIF":2.9,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143160271","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
A concept for functional bioceramics with embedded metallization using cold sintering 一种采用冷烧结的嵌入式金属化功能生物陶瓷的概念
IF 2.9
Open Ceramics Pub Date : 2024-12-02 DOI: 10.1016/j.oceram.2024.100716
Aliya Sharipova, Andreas Böhme, Marco Fritsch, Matthias Ahlhelm
{"title":"A concept for functional bioceramics with embedded metallization using cold sintering","authors":"Aliya Sharipova,&nbsp;Andreas Böhme,&nbsp;Marco Fritsch,&nbsp;Matthias Ahlhelm","doi":"10.1016/j.oceram.2024.100716","DOIUrl":"10.1016/j.oceram.2024.100716","url":null,"abstract":"<div><div>We demonstrate a novel concept for fabricating bioceramic multilayers with embedded metallization at low temperatures. Using direct cold sintering, i.e., high-pressure consolidation at 1000 MPa and 50 °C without transient phase or added binder, we produced gelatine-including hydroxyapatite (HAP) ceramics (70 wt% HAP) with embedded gold (Au) structures. The proposed method eliminates the need for thermal treatment or debinding steps, commonly required for multilayered ceramics with embedded metallization. Obtained ceramic-metal interfaces show good integrity with no delamination when loose ceramic powders consolidated with metallization. The integrity of the interface is attributed to increased roughness between two phases. Our work demonstrates the feasibility of producing multilayered functional bioceramics with embedded circuitry through direct cold sintering of HAP-gelatin powders with Au structures.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100716"},"PeriodicalIF":2.9,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159390","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
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