International Journal of Ceramic Engineering & Science最新文献

{"title":"High-performance alumina composite ceramics with brick-and-mortar structure derived from microsphere","authors":"Yedong Rong,&nbsp;Shihui Zhao,&nbsp;Qifan Zhang,&nbsp;Jianli Qiao,&nbsp;Guolong Sang,&nbsp;Xiaoqing Xi,&nbsp;Jinlong Yang","doi":"10.1002/ces2.70002","DOIUrl":"10.1002/ces2.70002","url":null,"abstract":"<p>A series of alumina composite ceramics with a brick-and-mortar structure were successfully prepared by coating with different contents of ZrO₂ and alumina sol on Al₂O₃ microspheres and hot pressing. By changing the process parameters, the influence of hot pressing on the mechanical properties of the material was explored. The synergistic effect of brick-and-mortar structure toughening, phase transformation toughening, and alumina sol self-toughening improves the mechanical properties of the alumina composite ceramics. The samples coated with ZrO₂ and alumina sol achieved the best performance when hot pressing pressure is 30 MPa and the temperature is 1540°C, with a fracture toughness of 7.4 MPa·m^1/2 and a flexural strength of 671 MPa. The ZrO₂ content of this sample is only 2 wt%. Compared with the control group of Al₂O₃ solid microspheres directly hot pressed, the fracture toughness increased by 17% and 26%, respectively. Self-toughening Al₂O₃ ceramics were successfully prepared by coating alumina sol. Its fracture toughness is 6.8 MPa·m^1/2 and its flexural strength is 600 MPa. This method is not only suitable for toughening alumina composite ceramics, but also maintains their high strength, with the potential for industrial production.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"7 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.70002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629838","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}

{"title":"Calculation model by Voronoi network and verification of zinc oxide varistor considering conduction mechanism","authors":"Xiao Lei,&nbsp;Xin Ning,&nbsp;Peng Liu,&nbsp;Pengfei Meng,&nbsp;Yue Yin,&nbsp;Jingke Guo","doi":"10.1002/ces2.70001","DOIUrl":"10.1002/ces2.70001","url":null,"abstract":"<p>This paper investigates the impact of the microstructure of zinc oxide varistor ceramics on their electrical properties. The microstructure of varistor was characterized by Voronoi network, and the relationship between microstructure and electrical properties was studied by experiments. The results of the calculations indicate that the reduction of grain size leads to a linear increase in voltage gradient but also reduces the energy handling capacity and current-carrying capacity. An increase in grain nonuniformity causes a decrease in voltage gradient and leakage current, while the nonlinear coefficient and residual voltage ratio increase. The variation of grain resistivity significantly affects the residual voltage ratio, and the two are almost proportional. When the grain resistivity reaches 50 Ω·m, the residual voltage ratio is as high as 2.37. The influence of grain resistivity on flow capacity has an obvious inflection point and reaches the maximum value at about 1 Ω·m, about 5000 A. The increase in sample diameter size leads to a decrease in the varistor voltage gradient and nonlinear coefficient. The results can better characterize the effect of the changes of the structure of the varistor on the electrical properties.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"7 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.70001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481475","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}

{"title":"Effect of gibbsite in lithomargic clay on the mechanical and physical properties of limestone calcined clay cement","authors":"Clement Nyarko Opoku,&nbsp;Anthony Andrews,&nbsp;Martinson Addo Nartey,&nbsp;Eric Kwame Asare","doi":"10.1002/ces2.70000","DOIUrl":"10.1002/ces2.70000","url":null,"abstract":"<p>Cement, a non-renewable yet essential commodity in the construction industry remains the most used material despite the high CO₂ emissions associated with the production. To address this, several attempts such as pozzolans have been used to replace cementitious materials. Currently, limestone calcined clay cement (LC³) has gained prominence as a solution to ensure sustainability in the construction industry. To this end, this work investigated the effect of gibbsite in lithomargic clay on the physical and mechanical properties of LC³. The gibbsite and kaolinite fractions in lithomargic clay were separated using the 90 µm mesh. Geotechnical analysis was performed on &lt;90 µm clay to ascertain its suitability as supplementary cementitious material and further calcined at 800°C for 1 h. Paste cubes were produced from LC³ and cured at 7, 14, and 28 days. The compressive strength results for all gibbsite-containing formulations after 28 days were above 20 MPa; thus, can be classified as type M masonry cement. Furthermore, the density of LC³ cubes, which has a relationship with compressive strength was seen to increase as curing age increased, thus corresponding to an increase in compressive strength, which has the potential to enhance the resistance of LC³ paste cube specimens to harsh environmental conditions.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"7 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.70000","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481474","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}

{"title":"Additive manufacturing of textured barium titanate ceramics via shear force-induced platelet alignment","authors":"Alexis Lopez,&nbsp;Luis Rodriguez,&nbsp;Aaron Rodriguez,&nbsp;Sabina Arroyo,&nbsp;Alan Loera,&nbsp;Diana Fontes,&nbsp;Sofia Perez,&nbsp;Md Shahjahan Mahmud,&nbsp;Laura Molina,&nbsp;Saqlain Zaman,&nbsp;Cory Marquez,&nbsp;Joshua Dantzler,&nbsp;Anabel Renteria,&nbsp;Yirong Lin","doi":"10.1002/ces2.70003","DOIUrl":"10.1002/ces2.70003","url":null,"abstract":"<p>This study explores the potential of single crystal barium titanate (BTO) platelets to fabricate nontoxic ceramics with enhanced material properties through texturization of grain structure. The proposed methodology relies on direct ink write additive manufacturing to enable grain-oriented growth of BTO ceramics by utilizing a combination of spherical and platelet-shaped particles. The use of platelet-shaped particles in the ceramic ink guides particle alignment parallel to the build plate due to shear forces at the nozzle during the printing process. While platelet contents ranging from 0 to 40 wt.% showed a decrease in density as the content increased, experimental data revealed an incremental trend between platelet content, dielectric properties, and the degree of alignment of the particles on the F200 crystal plane, achieving a maximum texturized orientation of 65%. Such orientation resulted in 29.55% improved dielectric properties compared with randomly oriented BTO ceramic. The findings of this research validate the effectiveness of additive manufacturing technologies to tailor the microstructural characteristics of ceramics for specific functional applications.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"7 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.70003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481476","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}

{"title":"Rapid and low-temperature synthesis of MoAlB MAB phase by using stress-induced Al-particles","authors":"Maharshi Dey,&nbsp;Quan Tran,&nbsp;Jin Zhang,&nbsp;Godswill Ngige,&nbsp;Sabah Javaid,&nbsp;Michelle Pantoya,&nbsp;Surojit Gupta","doi":"10.1002/ces2.10247","DOIUrl":"10.1002/ces2.10247","url":null,"abstract":"<p>Currently, MoAlB particles are produced at 1000°C and higher temperatures. In this manuscript, we report the rapid synthesis of MoAlB by altering the stress of Al particles to affect Al reactivity. The Al particles were purposefully stress-altered to reduce their threshold for reaction. The stress-altering process consisted of annealing followed by quenching of the aluminum powder. The combined process caused a reaction at a lower temperature between Mo, B, and Al to form MoAlB. The stress-altering of Al particles (i.e., Al [TT-treated]) was effective in producing &gt;95 wt.% MoAlB after reaction at only 700°C for 10 min, a significant reduction in temperature. Based on these results, we can further project that this process can be used for manufacturing Al-based compositions at significantly lower temperatures.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.10247","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143115415","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}

{"title":"Investigating lightweight foamed concrete prepared using selected brands of detergent and cement grades","authors":"Michael Asante-Amankwa,&nbsp;Anthony Andrews","doi":"10.1002/ces2.10253","DOIUrl":"10.1002/ces2.10253","url":null,"abstract":"<p>Foamed concrete, a lightweight, cement slurry-based cellular material, presents a promising solution to economic and environmental challenges in the construction industry. Its versatility spans from structural applications to thermal insulation and soundproofing, offering benefits such as low density, energy efficiency, and affordability. The study explored the feasibility of using locally sourced materials, specifically by utilizing three different powder detergents (K, M, and S) as foaming agents. These detergents were evaluated for their composition, density, and stability and then combined with two cement grades 32.5R and 42.5R. A total of 12 sample foamed concrete groups were manufactured and checked for compressive strength, density, and water absorption. The results demonstrated that all detergents in specific formulations successfully produced foamed concrete that met or exceeded the ASTM requirements of 1.4 MPa. Samples from Detergent K achieved a dry density range of 1.32–1.539 g/cm³ with 28-day compressive strength ranges of 0.64–14.25 MPa. Samples from Detergent M produced dry densities in the range of 1.255–1.559 g/cm³ with a compressive strength range of 0.41–12.26 MPa and those from Detergent S produced dry density range of 1.061–1.394 g/cm³ with compressive strength range of 1.03–7. 75 MPa. Notably, there were correlations between the detergent's pH, the relevant oxide quantities and the foam's density and stability which together influenced the overall performance of the foamed concrete.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.10253","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143115416","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}

{"title":"Red mud incorporated clay roof tiles as visible light-active photocatalysts for building applications","authors":"Erdem Tevfik Özdemir,&nbsp;Ahmet Yavaş,&nbsp;Saadet Güler,&nbsp;Mustafa Erol","doi":"10.1002/ces2.10252","DOIUrl":"10.1002/ces2.10252","url":null,"abstract":"<p>This study aims to enhance the self-cleaning properties of clay roof tiles by incorporating red mud as an industrial waste. This approach contributes to a sustainable environment by upcycling waste and developing an improved building material. Various analyses were conducted to compare the physical, structural, morphological, elemental, and optical properties of clay tiles with varying amounts of red mud. The characterization results indicated that the addition of red mud to clay roof tiles resulted in homogeneous and uniform tiles with enhanced physical properties. The red mud-mixed clay roof tiles exhibited photocatalytic activity for the oxidation of methylene blue dye. Notably, while adding more than 5% red mud improved the physical properties, the optimal photocatalytic activity was observed in clay roof tiles with a 5% red mud addition. This study underscores the dual benefits of this approach: improving the functional properties of clay roof tiles and promoting the valorization of industrial waste.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.10252","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110975","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}

{"title":"Crystallographic characterization of Ag-doping in nanocrystallite hydroxyapatite and evaluation of photocatalytic activity of organic pollutants","authors":"Md. Sahadat Hossain,&nbsp;Shifa Sarkar,&nbsp;Samina Ahmed","doi":"10.1002/ces2.10250","DOIUrl":"10.1002/ces2.10250","url":null,"abstract":"<p>Pure and different percentages (0.25, 0.5, 1.0, and 2.5%) of silver (Ag) doped hydroxyapatites (Hap) were synthesized employing the wet chemical precipitation method. The samples were characterized with the aid of X-ray diffraction (phase analysis, crystallographic characterization, and crystal size calculation using Scherrer equation and different models), scanning electron microscopy, and optical bandgap energy. The Hap containing 0.25% Ag showed better photocatalytic activity in various dye concentrations, catalyst doses, and pH. At a very low catalyst dose (0.375 g/L) and 20 ppm pollutant concentration, reaction rate, and rate constant were evaluated for the Congo Red dye, ciprofloxacin, amoxicillin, and levofloxacin. The maximum rate constant (0.0028 min⁻¹) and reaction rate (9.657 × 10⁻⁸ mole L⁻¹·min⁻¹) were found for Congo Red dye and ciprofloxacin, respectively, using 0.25_Ag-Hap (0.25% Ag-doped Hap). The energies of the valance band (3.14 eV) and conduction band (−0.36 eV) were lower in the case of 0.25_Ag-Hap than the other samples. Simplified reaction mechanisms were proposed for the photocatalytic degradation of Congo Red dye, ciprofloxacin, amoxicillin, and levofloxacin.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.10250","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110955","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}

{"title":"Effect of potassium-waterglass composition on strength development and leaching behavior of geopolymers in different curing conditions","authors":"Umberto C. C. S. Siciliano,&nbsp;Ana C. C. Trindade,&nbsp;Flávio de Andrade Silva","doi":"10.1002/ces2.10251","DOIUrl":"10.1002/ces2.10251","url":null,"abstract":"<p>This study delves into the impact of different potassium-waterglass (K-WG) compositions on the early reaction dynamics and strength evolution in metakaolin-based geopolymers (GP). By maintaining a constant SiO₂/Al₂O₃ ratio of 4, the study explores the influence of varying H₂O/K₂O and K₂O/Al₂O₃ ratios on GP properties under both dry and saturated curing conditions. Early reaction kinetics are examined using isothermal calorimetry at room temperature (21°C), and pH measurements provide insights into alkali leaching. A strong correlation was found between total heat release and strength gain, as evidenced by ultrasonic cement analyzer (UCA) readings. The study further identifies that increased H₂O/K₂O ratios prolong setting times and delay the geopolymerization peaks, while a higher K₂O/Al₂O₃ ratio enhances the geopolymerization process. Vicat tests confirmed the results obtained by calorimetry and UCA: only the GP4 formulation (H₂O/K₂O = 8.7 and K₂O/Al₂O₃= 1.3) hardened in less than 7 days. Additionally, it was found that saturated curing conditions decelerate strength development, with an initial notable decline in compressive strength at 24 h compared with dry curing. However, this difference diminishes to a negligible 7.6% after 3 days. Optimal ratios of H₂O/K₂O = 8.7 and K₂O/Al₂O₃= 1.3 were determined to be critical for achieving reliable strength measurements at 1 day of curing. pH assessments indicated strong water resistance in all GP formulations, with leaching primarily governed by diffusion mechanisms. Specifically, the K-WG composition with SiO₂/K₂O = 1.53 and H₂O/K₂O = 8.69 showcased minimal leachability. These fundamental findings are crucial for the later design of GP materials that require rapid strength development, especially crucial for applications necessitating cementing under extreme conditions, such as deep-sea drilling, geothermal energy production, and high-temperature industrial processes.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.10251","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110940","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}

{"title":"Bismuth Schiff base complex and its oxide nanoparticles as photocatalyst for the removal of dyes from water","authors":"Behrouz Shaabani,&nbsp;Shadi Soleimaninia","doi":"10.1002/ces2.10249","DOIUrl":"10.1002/ces2.10249","url":null,"abstract":"<p>Bismuth oxide and bismuth complexes with organic ligands, particularly Schiff bases, have received much attention due to their non-toxicity, antibacterial, and photocatalytic properties in removing water and environmental contaminants by oxidative degradation. This work investigates the synthesis of bismuth complexes with the salicylidine Schiff base ligand of <b>H₂L</b> through hydrothermal and solvothermal methods, the preparation of bismuth oxide nanoparticles from these complexes, and the synthesis of bismuth oxide nanoparticles from bismuth nitrate. To characterize the products, several techniques including infrared, UV–vis, X-ray diffraction (XRD), energy-dispersive X-ray analysis, and scanning electron microscopy (SEM) have been used. Hydrothermally and solvothermally produced bismuth(III) complexes with <b>H₂L</b> had particle sizes of about 46 and 15 nm, respectively, while oxide nanoparticles made from them had sizes of about 42 and 52 nm, respectively.</p><p>The study also investigates the usage of complexes and oxide nanoparticles as photocatalysts under an ultraviolet (UV) lamp (30 W) irradiation to remove contaminants such as methyl orange, acid red 14, orange acid 7, and malachite green from water. The results showed that the bismuth complexes and oxide nanoparticles effectively remove these dyes from contaminated water samples.</p>","PeriodicalId":13948,"journal":{"name":"International Journal of Ceramic Engineering & Science","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ces2.10249","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121446","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}