Ceramics-Switzerland最新文献_第3页

Developing Geopolymer Concrete by Using Ferronickel Slag and Ground-Granulated Blast-Furnace Slag 利用镍铁矿渣和高炉矿渣研制土工聚合物混凝土

IF 2.8

Ceramics-Switzerland Pub Date : 2023-09-06 DOI: 10.3390/ceramics6030114

Q. D. Nguyen, Arnaud Castel

{"title":"Developing Geopolymer Concrete by Using Ferronickel Slag and Ground-Granulated Blast-Furnace Slag","authors":"Q. D. Nguyen, Arnaud Castel","doi":"10.3390/ceramics6030114","DOIUrl":"https://doi.org/10.3390/ceramics6030114","url":null,"abstract":"Geopolymer concrete is gaining recognition as an environmentally friendly alternative to traditional cement-based materials, offering potential solutions for reducing the carbon emissions of the construction industry. This study aims to develop GGBFS–FNS geopolymers utilising ferronickel slag (FNS) and ground-granulated blast-furnace slag (GGBFS). Ground FNS (GFNS) is a potential candidate for replacing fly ash in geopolymers. This research aims to develop for the first time a GGBFS–FNS alkali-activated concrete. Numerous trials were conducted including different GGBFS–FNS blend percentages, several chemical admixtures and varying activator concentrations to develop the optimal binder mix composition. The effects of different chemical admixtures on the properties of geopolymer pastes, mortars, and concretes were investigated. The study evaluated setting time, compressive strength, shrinkage, and physical and durability properties. The results indicate that conventional admixtures have limited impact on the setting time, while increasing the water/solid ratio and decreasing the GGBFS content could extend the initial and final setting times. The presence of FNS aggregate could improve the compressive strength of geopolymer mortars. The water absorber admixture was highly effective in reducing shrinkage and increasing chloride diffusion resistance. The geopolymer mix containing 50 wt.% GFNS and 50 wt.% GGBFS with the presence of the water absorber admixture presented high chloride diffusion resistance, non-reactivity to the alkali–silica reaction and high sulphate resistance. Overall, the GGBFS–FNS geopolymers exhibited promising potential for engineering applications as an environmentally friendly material, particularly in aggressive environments.","PeriodicalId":33263,"journal":{"name":"Ceramics-Switzerland","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48708612","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: 1

Anodic Performance of Ni–BCZY and Ni–BCZY–GDC Films on BCZY Electrolytes BCZY电解质上Ni–BCZY和Ni–BCZY–GDC膜的阳极性能

IF 2.8

Ceramics-Switzerland Pub Date : 2023-09-05 DOI: 10.3390/ceramics6030113

Yoshiteru Itagaki, Yota Kumamoto, Susumu Okayama, Hiromichi Aono

引用次数: 0

Phase Formation and Properties of Multicomponent Solid Solutions Based on Ba(Ti, Zr)O3 and AgNbO3 for Environmentally Friendly High-Efficiency Energy Storage 基于Ba(Ti, Zr)O3和AgNbO3的环境友好型高效储能多组分固溶体的相形成和性能

IF 2.8

Ceramics-Switzerland Pub Date : 2023-08-26 DOI: 10.3390/ceramics6030112

D. Volkov, E. Glazunova, L. Shilkina, Aleksandr V. Nazarenko, A. Pavelko, Vyacheslav A. Bobylev, L. Reznichenko, I. A. Verbenko

引用次数: 0

An Investigation of Iodovanadinite Wasteforms for the Immobilisation of Radio-Iodine and Technetium 用于放射性碘和锝固定化的碘钒矿废料的研究

IF 2.8

Ceramics-Switzerland Pub Date : 2023-08-24 DOI: 10.3390/ceramics6030111

D. Bailey, E. Johnstone, M. Stennett, C. Corkhill, N. Hyatt

引用次数: 0

Nutrient-Doped Hydroxyapatite: Structure, Synthesis and Properties 营养物掺杂羟基磷灰石:结构、合成与性能

IF 2.8

Ceramics-Switzerland Pub Date : 2023-08-22 DOI: 10.3390/ceramics6030110

Mohamed M. Ammar, Sherif Ashraf, J. Baltrusaitis

{"title":"Nutrient-Doped Hydroxyapatite: Structure, Synthesis and Properties","authors":"Mohamed M. Ammar, Sherif Ashraf, J. Baltrusaitis","doi":"10.3390/ceramics6030110","DOIUrl":"https://doi.org/10.3390/ceramics6030110","url":null,"abstract":"Complex inorganic powders based on calcium phosphates have found a plethora of practical applications. Of particular interest are the CaO-P2O5 system-based multi-component material powders and granules as the source of major- and micronutrients for the plants. The emerging strategy is to use nano fertilizers based on hydroxyapatite (HAP) for phosphorus and other nutrient delivery. The doping of micronutrients into HAP structure presents an interesting challenge in obtaining specific phase compositions of these calcium phosphates. Various techniques, including mechanochemical synthesis, have been employed to fabricate doped HAP. Mechanochemical synthesis is of particular interest in this review since it presents a relatively simple, scalable, and cost-effective method of calcium phosphate powder processing. The method involves the use of mechanical force to promote chemical reactions and create nanometric powders. This technique has been successfully applied to produce HAP nanoparticles alone, and HAP doped with other elements, such as zinc and magnesium. Nanofertilizers developed through mechanochemical synthesis can offer several advantages over conventional fertilizers. Their nanoscale size allows for rapid absorption and controlled release of nutrients, which leads to improved nutrient uptake efficiency by plants. Furthermore, the tailored properties of HAP-based nano fertilizers, such as controlled porosity and degradation levels, contribute to their effectiveness in providing plant nutrition.","PeriodicalId":33263,"journal":{"name":"Ceramics-Switzerland","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44344991","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

Influence of Alkali Metal Ions on the Structural and Spectroscopic Properties of Sm3+-Doped Silicate Glasses 碱金属离子对掺杂Sm3+硅酸盐玻璃结构和光谱性能的影响

IF 2.8

Ceramics-Switzerland Pub Date : 2023-08-21 DOI: 10.3390/ceramics6030109

Israel R. Montoya Matos

引用次数: 0

Alkali-Activated Brick Aggregates as Industrial Valorized Wastes: Synthesis and Properties 碱活性砖骨料的合成与性能研究

IF 2.8

Ceramics-Switzerland Pub Date : 2023-08-14 DOI: 10.3390/ceramics6030108

A. Boughriet, O. Allahdin, N. Poumaye, Gildas Doyemet, G. Tricot, B. Revel, B. Ouddane, M. Wartel

{"title":"Alkali-Activated Brick Aggregates as Industrial Valorized Wastes: Synthesis and Properties","authors":"A. Boughriet, O. Allahdin, N. Poumaye, Gildas Doyemet, G. Tricot, B. Revel, B. Ouddane, M. Wartel","doi":"10.3390/ceramics6030108","DOIUrl":"https://doi.org/10.3390/ceramics6030108","url":null,"abstract":"In recent works, many industrial by-products were employed as solid precursors for the synthesis of alkali-activated binders and as alternatives to Portland cement for the immobilization of hazardous, toxic and nuclear wastes. Among industrial wastes, alkali-activated brick was found to be an interesting porous composite for removing very toxic heavy metals (Pb2+, Cd2+, Co2+) and radio-nuclides (Sr2+, Cs+, Rb+) from aqueous solutions. The starting material is very attractive due to the presence of metakaolinite as a geo-polymer precursor and silica for increasing material permeability and facilitating water filtration. The alkaline reaction gave rise to geo-polymerization followed by partial zeolitization. Elemental surface micro-analysis was performed by Scanning Electron Microscopy (SEM) equipped with an Energy-Dispersive X-ray Spectrometer (EDS). The formation of crystalline phases was corroborated by X-ray diffraction (XRD) analysis. Information about 29Si, 27Al and 1H nuclei environments in crystallized and amorphous aluminosilicates was obtained by 29Si, 27Al and 1H MAS NMR. 27Al–1H dipolar-mediated correlations were investigated by employing dipolar hetero-nuclear multiple quantum coherence (D-HMQC) NMR, highlighting Al–O–H bonds in bridging hydroxyl groups (Si–OH–Al) that are at the origin of adsorptive properties. Aqueous structural stability and cationic immobilization characteristics before and after material calcination were investigated from acid-leaching experiments.","PeriodicalId":33263,"journal":{"name":"Ceramics-Switzerland","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47353363","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

Geopolymer Antimicrobial and Hydrophobic Modifications: A Review 地质聚合物的抗菌和疏水改性：综述

IF 2.8

Ceramics-Switzerland Pub Date : 2023-08-11 DOI: 10.3390/ceramics6030107

Vojtěch Růžek, J. Novosád, K. Buczkowska

{"title":"Geopolymer Antimicrobial and Hydrophobic Modifications: A Review","authors":"Vojtěch Růžek, J. Novosád, K. Buczkowska","doi":"10.3390/ceramics6030107","DOIUrl":"https://doi.org/10.3390/ceramics6030107","url":null,"abstract":"The article summarizes the state of the art in increasing antimicrobial activity and hydrophobic properties of geopolymer materials. Geopolymers are inorganic polymers formed by polycondensation of aluminosilicate precursors in an alkaline environment and are considered a viable alternative to ordinary Portland cement-based materials, due to their improved mechanical properties, resistance to chemicals, resistance to high temperature, and lower carbon footprint. Like concrete, they are susceptible to microbially induced deterioration (corrosion), especially in a humid environment, primarily due to surface colonization by sulphur-oxidizing bacteria. This paper reviews various methods for hydrophobic or antimicrobial protection by the method of critical analysis of the literature and the results are discussed, along with potential applications of geopolymers with improved antimicrobial properties. Metal nanoparticles, despite their risks, along with PDMS and epoxy coatings, are the most investigated and effective materials for geopolymer protection. Additionally, future prospects, risks, and challenges for geopolymer research and protection against degradation are presented and discussed.","PeriodicalId":33263,"journal":{"name":"Ceramics-Switzerland","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41841226","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: 3

Structure and Relaxor Behavior of (0.5 − x)BiFeO3-0.5PbFe0.5Nb0.5O3-xPbTiO3 Ternary Ceramics （0.5−x）BiFeO3-0.5PbFe0.5Nb0.5O3-xPbTiO3三元陶瓷的结构和弛豫行为

IF 2.8

Ceramics-Switzerland Pub Date : 2023-08-08 DOI: 10.3390/ceramics6030106

N. Boldyrev, Eugene I. Sitalo, L. A. Shilkina, A. Nazarenko, A. Ushakov, V. Shur, L. Reznichenko, E. Glazunova

{"title":"Structure and Relaxor Behavior of (0.5 − x)BiFeO3-0.5PbFe0.5Nb0.5O3-xPbTiO3 Ternary Ceramics","authors":"N. Boldyrev, Eugene I. Sitalo, L. A. Shilkina, A. Nazarenko, A. Ushakov, V. Shur, L. Reznichenko, E. Glazunova","doi":"10.3390/ceramics6030106","DOIUrl":"https://doi.org/10.3390/ceramics6030106","url":null,"abstract":"Ceramics of the quasi-binary concentration section (0.1 ≤ x ≤ 0.2, Δx = 0.025) of the ternary solid solution system (0.5 − x)BiFeO3-0.5PbFe0.5Nb0.5O3-xPbTiO3 were prepared by the conventional solid-phase reaction method. An X-ray study at different temperatures revealed that (0.5 − x)BF-0.5PFN-xPT ceramics have a cluster morphology. Clusters have different modulation, crystal lattice symmetry, and chemical composition. The presence of a cluster structure in a solid solution with heterovalent substitution, consisting of regions rich in Ti+4, Nb+5, or Fe3+, has led to the appearance of Maxwell–Wagner polarization in the studied ceramics. The study of the dielectric characteristics revealed the relaxor-like behavior of the studied ceramics. The grain morphology, dielectric, pyroelectric, and piezoelectric properties of the selected solid solutions were investigated. The highest piezoelectric coefficient, d33 = 280 pC/N, was obtained in the 0.3BiFeO3-0.5PbFe0.5Nb0.5O3-0.2PbTiO3 ceramics. Study of the dielectric characteristics of all samples revealed relaxor ferroelectric behavior and a region of diffuse phase transition from the paraelectric to ferroelectric phase in the temperature range of 140–170 °C.","PeriodicalId":33263,"journal":{"name":"Ceramics-Switzerland","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45485215","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

Zirconia-Based Ceramics Reinforced by Carbon Nanotubes: A Review with Emphasis on Mechanical Properties 碳纳米管增强氧化锆基陶瓷的力学性能

IF 2.8

Ceramics-Switzerland Pub Date : 2023-08-06 DOI: 10.3390/ceramics6030105

S. Lamnini, D. Pugliese, F. Baino

引用次数: 0