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Thermal stability of hydraulic non-cement binder prepared from FBC ash
IF 2.9
Open Ceramics Pub Date : 2025-04-15 DOI: 10.1016/j.oceram.2025.100779
Martina Šídlová , Rostislav Šulc
{"title":"Thermal stability of hydraulic non-cement binder prepared from FBC ash","authors":"Martina Šídlová ,&nbsp;Rostislav Šulc","doi":"10.1016/j.oceram.2025.100779","DOIUrl":"10.1016/j.oceram.2025.100779","url":null,"abstract":"<div><div>The thermal stability of a non-cement sulfocalcic binder (SCB) prepared from FBC ash was studied at 80 °C, 200 °C and 600 °C for 90 days and compared with the thermal stability of OPC. All the test bodies produced from SCB pastes had been pretreated in a humidity chamber for 28 days. The SCB was found to be stable in terms of strength at temperatures of up to 80 °C. At a temperature of 200 °C, ettringite in the SCB disintegrated and its strength dropped by about 27 % in the initial hours of the experiment, after which the strength of the SCB became stable. At a temperature of 600 °C, the strength of the SCB was seen to drop again by about 46 %. However, in the long term, the SCB at 600 °C appeared more stable when compared to OPC, which can be attributed to the presence of C-A-S-H phase.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100779"},"PeriodicalIF":2.9,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848640","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}
引用次数: 0
Corrigendum to “Multi-material functionally graded additive manufacturing of zirconia ceramic: A systematic review” [Open Ceramics, Volume 21 (2025), 100741]
IF 2.9
Open Ceramics Pub Date : 2025-04-09 DOI: 10.1016/j.oceram.2025.100775
Sinan A. Shwailiya , Mahammed Rashid Hameed
{"title":"Corrigendum to “Multi-material functionally graded additive manufacturing of zirconia ceramic: A systematic review” [Open Ceramics, Volume 21 (2025), 100741]","authors":"Sinan A. Shwailiya ,&nbsp;Mahammed Rashid Hameed","doi":"10.1016/j.oceram.2025.100775","DOIUrl":"10.1016/j.oceram.2025.100775","url":null,"abstract":"","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100775"},"PeriodicalIF":2.9,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808276","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}
引用次数: 0
Temperature dependence of Young's modulus of kaolin-based silicate ceramics with mullite addition
IF 2.9
Open Ceramics Pub Date : 2025-03-28 DOI: 10.1016/j.oceram.2025.100774
Petra Šimonová , Eva Gregorová , Willi Pabst , Daria Viazun , Petr Bezdička
{"title":"Temperature dependence of Young's modulus of kaolin-based silicate ceramics with mullite addition","authors":"Petra Šimonová ,&nbsp;Eva Gregorová ,&nbsp;Willi Pabst ,&nbsp;Daria Viazun ,&nbsp;Petr Bezdička","doi":"10.1016/j.oceram.2025.100774","DOIUrl":"10.1016/j.oceram.2025.100774","url":null,"abstract":"<div><div>The temperature dependence of Young's modulus of kaolin-based silicate ceramics with mullite addition fired at 1100, 1200, 1300, 1400 and 1500 °C is investigated using the impulse excitation technique (IET). A minimum is observed at around 1200 °C, followed by a steep increase to ∼120 GPa and a stepwise discontinuity at ∼1270 °C to final values of 60–70 GPa, which are retained up to 1500 °C. This peculiar behavior can be explained by the assumption that the glass melt is able to heal pre-existent microcracks and the softening of the glass phase leads to a splitting of the resonant frequency peak, i.e. a decoupling of the flexural vibrations of the interconnected mullite skeleton (67–75 wt. %) and the interskeletal glassy phase (24–28 wt. %), which finally leads to a discontinuity when the mullite crystals become disconnected and the microstructure of the material changes from bicontinuous to matrix-inclusion type.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100774"},"PeriodicalIF":2.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143767648","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
Environmentally friendly water-based robocasting of complex barium titanate structures
IF 2.9
Open Ceramics Pub Date : 2025-03-24 DOI: 10.1016/j.oceram.2025.100773
Larissa Wahl , David Köllner , Michelle Weichelt , Nahum Travitzky , Tobias Fey
{"title":"Environmentally friendly water-based robocasting of complex barium titanate structures","authors":"Larissa Wahl ,&nbsp;David Köllner ,&nbsp;Michelle Weichelt ,&nbsp;Nahum Travitzky ,&nbsp;Tobias Fey","doi":"10.1016/j.oceram.2025.100773","DOIUrl":"10.1016/j.oceram.2025.100773","url":null,"abstract":"<div><div>In this work, barium titanate structures (e.g., cellular and monolithic) were fabricated by robocasting, which is an extrusion-based additive manufacturing process in which shear-thinning pastes are deposited. An environmentally friendly water-based paste was investigated and printed layerwise to achieve the desired structure. After sintering, a relative density of 97 % was obtained, and the mechanical and physical properties of the printed samples were investigated. The flexural strength of ∼40 MPa and the hardness of ∼3 GPa of the fabricated samples are comparable to literature data. Additionally, the piezoelectric coefficient d<sub>33</sub> of the structures was measured. With values of around 200 pC/N, both monolithic and cellular samples show good results without the need for further densification. Despite the high porosity of the cellular structures, they show high piezoelectric coefficients, which opens up several new application fields and shows the importance of combining additive manufacturing and piezoelectric ceramics.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100773"},"PeriodicalIF":2.9,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725467","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
Manufacturing-Driven Insights into Structure, Mechanics, and Permeability of Asymmetric LSCF Membranes via Freeze Casting and Tape Casting
IF 2.9
Open Ceramics Pub Date : 2025-03-21 DOI: 10.1016/j.oceram.2025.100772
Valdir Pereira Junior , Priscila Lemes , Murilo Daniel de Mello Innocentini , Mara Gabriela Novy Quadri , Dachamir Hotza , Sergio Yesid Gómez González
{"title":"Manufacturing-Driven Insights into Structure, Mechanics, and Permeability of Asymmetric LSCF Membranes via Freeze Casting and Tape Casting","authors":"Valdir Pereira Junior ,&nbsp;Priscila Lemes ,&nbsp;Murilo Daniel de Mello Innocentini ,&nbsp;Mara Gabriela Novy Quadri ,&nbsp;Dachamir Hotza ,&nbsp;Sergio Yesid Gómez González","doi":"10.1016/j.oceram.2025.100772","DOIUrl":"10.1016/j.oceram.2025.100772","url":null,"abstract":"<div><div>The performance of dense membranes is influenced by both material properties and design features, with thinner membranes exhibiting faster transport rates than thicker ones. However, mechanical limitations restrict the use of standalone thin membranes. A hierarchical structure approach is proposed to address this issue, consisting of a thin, dense layer supported by a porous substrate that provides mechanical strength. The porous support is engineered through microstructuring the pore architecture to enhance strength and permeation rates, as it governs overall oxygen transport in asymmetric membranes. This study combines freeze casting and tape casting to fabricate asymmetric LSCF membranes. The porous supports were manufactured using freeze casting, studying the effects of the freezing method, solids load, and binder concentration systematically evaluated through experimental design. The interaction between these variables and their impact on mechanical properties, porosity, and permeability was thoroughly analyzed. The freezing method significantly altered pore directionality, connectivity, stress strength, fracture strain, and permeability. While standalone dense membranes exhibited low mechanical strength, the porous support demonstrated up to 13-fold mechanical strength. The dense, thin membrane, produced by tape casting, was successfully coupled with the porous support, with no cracking or delamination observed at the interface after deposition and co-sintering.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100772"},"PeriodicalIF":2.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725466","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
Novel dual-phase Ce0.8Gd0.2O2−δ – Gd1-xCexFe1-yCoyO3 composite oxygen transport membrane
IF 2.9
Open Ceramics Pub Date : 2025-03-17 DOI: 10.1016/j.oceram.2025.100771
Liudmila Fischer , Nawar Haddad , Ke Ran , Stefan Baumann , Doris Sebold , Joachim Mayer , Jürgen Dornseiffer , Arian Nijmeijer , Olivier Guillon , Wilhelm A. Meulenberg
{"title":"Novel dual-phase Ce0.8Gd0.2O2−δ – Gd1-xCexFe1-yCoyO3 composite oxygen transport membrane","authors":"Liudmila Fischer ,&nbsp;Nawar Haddad ,&nbsp;Ke Ran ,&nbsp;Stefan Baumann ,&nbsp;Doris Sebold ,&nbsp;Joachim Mayer ,&nbsp;Jürgen Dornseiffer ,&nbsp;Arian Nijmeijer ,&nbsp;Olivier Guillon ,&nbsp;Wilhelm A. Meulenberg","doi":"10.1016/j.oceram.2025.100771","DOIUrl":"10.1016/j.oceram.2025.100771","url":null,"abstract":"<div><div>Oxygen Transport Membranes with mixed oxygen ionic-electronic conductivity are investigated for in-situ oxygen separation in various processes such as oxy-combustion or catalytic membrane reactors enabling process intensification. Dual-phase composite membranes are of high interest due to the opportunity selecting thermo-chemical stable phases conducting oxygen ions and electrons separately. Recently, we reported a novel composite utilizing a donor doped gadolinium ferrite Gd<sub>0.85</sub>Ce<sub>0.15</sub>Fe<sub>0.75</sub>Co<sub>0.25</sub>O<sub>3</sub> as electronic conductor. Here, the composition of this perovskite system is systematically varied and its structural as well as functional properties are investigated. Moreover, the option of a cobalt-free composition is investigated.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100771"},"PeriodicalIF":2.9,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681919","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
Production and characterization of conical shaped ultra-high temperature ceramics matrix composites by slip casting and pressure-less sintering
IF 2.9
Open Ceramics Pub Date : 2025-03-13 DOI: 10.1016/j.oceram.2025.100766
Matteo Mor , Simone Taraborelli , Diletta Sciti
{"title":"Production and characterization of conical shaped ultra-high temperature ceramics matrix composites by slip casting and pressure-less sintering","authors":"Matteo Mor ,&nbsp;Simone Taraborelli ,&nbsp;Diletta Sciti","doi":"10.1016/j.oceram.2025.100766","DOIUrl":"10.1016/j.oceram.2025.100766","url":null,"abstract":"<div><div>This study investigates the fabrication and characterization of cone shaped fibre reinforced ultra-high-temperature ceramic matrix composites (UHTCMCs) based on ZrB<sub>2</sub>, using slip casting and pressure-less sintering at 2100 °C in Ar. For the sake of comparison, the same process was used for production of bulk ZrB₂-based cones. The slip casting technique effectively ensured a homogeneous fibre distribution in the sample. The addition of fibres imparted a sufficient mechanical resistance to the green bodies and led to near no shrinkage during densification, achieving a lightweight conical structure with a density of 1 g/cm<sup>3</sup>. Despite the high content of porosity, the cones survived two consecutive oxidation tests at 1650 °C for 1 and 3 min. Overall, slip casting proved to be a viable method for producing UHTCMCs with complex shapes and oxidation resistance.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100766"},"PeriodicalIF":2.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642805","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
Understanding the gas phase formation of silicon carbide during reactive melt infiltration of carbon substrates
IF 2.9
Open Ceramics Pub Date : 2025-03-13 DOI: 10.1016/j.oceram.2025.100767
Manikanda Priya Prakasan, Tobias Schneider, Dietmar Koch
{"title":"Understanding the gas phase formation of silicon carbide during reactive melt infiltration of carbon substrates","authors":"Manikanda Priya Prakasan,&nbsp;Tobias Schneider,&nbsp;Dietmar Koch","doi":"10.1016/j.oceram.2025.100767","DOIUrl":"10.1016/j.oceram.2025.100767","url":null,"abstract":"<div><div>Carbon-Carbon composites with protective Silicon Carbide surface (C/C-SiC) are well-known for their exceptional heat and oxidation resistance. Reactive Melt Infiltration (RMI) is employed to impart oxidation resistance to these composites by transforming the carbon matrix surface into silicon carbide. Successful infiltration yields dense-grey SiC, while unsuccessful process yields porous-green layer, compromising oxidation resistance and inducing high-temperature surface damage. Identifying the causes of failed siliconization and their influencing factors is crucial for enhancing high-temperature performance. This study proves that SiC formation from gas-phase reactions prior to silicon melting causes green surface layer. Through siliconization experiments and Thermogravimetric Analysis combined with Fourier Transform Infrared spectroscopy, these gaseous reactions are linked to the specific-surface characteristics of silicon powder used. Microstructural differences between gas and liquid reaction-formed SiC leads to the proposed four-step reaction pathway, explaining the formation of green SiC. These findings offer vital insights for optimizing the outcome of surface siliconization process.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100767"},"PeriodicalIF":2.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697544","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
Low-cost ceramic membranes prepared from kaolin and quartz via tape casting using different pore formers
IF 2.9
Open Ceramics Pub Date : 2025-03-11 DOI: 10.1016/j.oceram.2025.100765
Camila Silveira , Jessica Mulinari , Agenor De Noni Junior , Alan Ambrosi , Dachamir Hotza , Marco Di Luccio
{"title":"Low-cost ceramic membranes prepared from kaolin and quartz via tape casting using different pore formers","authors":"Camila Silveira ,&nbsp;Jessica Mulinari ,&nbsp;Agenor De Noni Junior ,&nbsp;Alan Ambrosi ,&nbsp;Dachamir Hotza ,&nbsp;Marco Di Luccio","doi":"10.1016/j.oceram.2025.100765","DOIUrl":"10.1016/j.oceram.2025.100765","url":null,"abstract":"<div><div>Ceramic membranes offer high thermal, chemical, and mechanical stability, long lifespan, and high hydrophilicity. However, their high cost limits widespread use, highlighting the need for low-cost alternatives. This study evaluated kaolin and quartz for ceramic membranes production via tape casting. The influence of quartz content (10 – 50 vol%), sintering temperature (1300 or 1400 °C), and pore formers (graphite or PMMA) on membrane properties were studied. Without pore formers, open porosity and water permeance were considerably improved just by increasing quartz content. Adding PMMA or graphite more than doubled porosity at lower quartz content, increasing water permeance almost 13- and 22-fold, respectively. Membranes with ∼60 % porosity and water permeances of 1926–2646 L·m<sup>-2</sup>·h<sup>-1</sup>·bar<sup>-1</sup> were obtained at 1300 °C using graphite. This study shows that adjusting slurry composition and sintering temperature enables the production of low-cost kaolinite-based membranes with tailored properties, expanding their applications in separation processes while reducing costs and environmental impact.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100765"},"PeriodicalIF":2.9,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748433","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
Graphene-membranes prepared by layer-by-layer deposition of graphene flakes on porous ceramic supports
IF 2.9
Open Ceramics Pub Date : 2025-03-11 DOI: 10.1016/j.oceram.2025.100763
Gabriele Schmidl , Marc Pezoldt , Guobin Jia , Andrea Dellith , Adrian Simon , Uwe Ritter , Ingolf Voigt , Jonathan Plentz
{"title":"Graphene-membranes prepared by layer-by-layer deposition of graphene flakes on porous ceramic supports","authors":"Gabriele Schmidl ,&nbsp;Marc Pezoldt ,&nbsp;Guobin Jia ,&nbsp;Andrea Dellith ,&nbsp;Adrian Simon ,&nbsp;Uwe Ritter ,&nbsp;Ingolf Voigt ,&nbsp;Jonathan Plentz","doi":"10.1016/j.oceram.2025.100763","DOIUrl":"10.1016/j.oceram.2025.100763","url":null,"abstract":"<div><div>Porous ceramic substrates are an excellent alternative for gas separation in industrial processes at high temperature and pressure conditions. A coating of graphene supports permeances and gas separation based on modified separation pathways determined by the single layer. Graphene is an excellent material for membranes that can be used under aggressive conditions. The double self-assembly (DSA) process developed for this purpose was used to fabricate very thin graphene membranes by layer-by-layer deposition of graphene flakes on flat porous ceramic substrates. The permeances of individual gases such as He, H<sub>2</sub>, CO<sub>2</sub>, N<sub>2</sub>, CH<sub>4</sub> and SF<sub>6</sub> decrease with the number of graphene layers. This is most pronounced up to a graphene layer number of 8 but strongly depends on the utilized ceramic substrate. Furthermore, for 8x coated membranes the selectivity of H<sub>2</sub>/CO<sub>2</sub> and H<sub>2</sub>/SF<sub>6</sub> increases to 5.12 and 10.28 at a process temperature of 200 °C. The influence of a thermal pre-treatment under N<sub>2</sub> and H<sub>2</sub> from 400 °C up to 800 °C on the permeances is shown and Raman measurements were carried out for qualitative observation of the defect behavior.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"22 ","pages":"Article 100763"},"PeriodicalIF":2.9,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594263","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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