Ceramics-Switzerland最新文献_第4页

Unlocking the Potential of Biomass Fly Ash: Exploring Its Application in Geopolymeric Materials and a Comparative Case Study of BFA-Based Geopolymeric Concrete against Conventional Concrete 释放生物质粉煤灰的潜力：探索其在地质聚合物材料中的应用——以BFA基地质聚合物混凝土与常规混凝土的对比研究为例

IF 2.8

Ceramics-Switzerland Pub Date : 2023-08-03 DOI: 10.3390/ceramics6030104

B. Yalcinkaya, Tomáš Špirek, M. Bouša, P. Louda, Vojtěch Růžek, C. Rapiejko, K. Buczkowska

{"title":"Unlocking the Potential of Biomass Fly Ash: Exploring Its Application in Geopolymeric Materials and a Comparative Case Study of BFA-Based Geopolymeric Concrete against Conventional Concrete","authors":"B. Yalcinkaya, Tomáš Špirek, M. Bouša, P. Louda, Vojtěch Růžek, C. Rapiejko, K. Buczkowska","doi":"10.3390/ceramics6030104","DOIUrl":"https://doi.org/10.3390/ceramics6030104","url":null,"abstract":"The production of conventional cement involves high energy consumption and the release of substantial amounts of carbon dioxide (CO2), exacerbating climate change. Additionally, the extraction of raw materials, such as limestone and clay, leads to habitat destruction and biodiversity loss. Geopolymer technology offers a promising alternative to conventional cement by utilizing industrial byproducts and significantly reducing carbon emissions. This paper analyzes the utilization of biomass fly ash (BFA) in the formation of geopolymer concrete and compares its carbon and cost impacts to those of conventional concrete. The previous analysis shows great potential for geopolymers to reduce the climate change impact of cement production. The results of this analysis indicate a significant disparity in the computed financial and sustainability costs associated with geopolymers. Researchers have shown that geopolymers may help mitigate the effects of cement manufacturing on the environment. These geopolymers are predicted to reduce green gas emissions by 40–80%. They also show that those advantages can be realized with the best possible feedstock source and the cheapest possible conveyance. Furthermore, our case study on CO2 emission and cost calculation for BFA-based geopolymer and conventional concrete shows that geopolymer concrete preparation emits 56% less CO2 than conventional concrete while costing 32.4% less per ton.","PeriodicalId":33263,"journal":{"name":"Ceramics-Switzerland","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45051652","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: 2

Synthesis and Characterization of Nd:YAG Ceramics for Laser Applications 激光用Nd:YAG陶瓷的合成与表征

IF 2.8

Ceramics-Switzerland Pub Date : 2023-08-02 DOI: 10.3390/ceramics6030102

Olga Alondra Echartea-Reyes, Gloria Verónica Vázquez-García, J. A. Castillo-Robles, J. López-Hernández, C. Calles-Arriaga, W. Pech-Rodríguez, E. Rocha-Rangel

{"title":"Synthesis and Characterization of Nd:YAG Ceramics for Laser Applications","authors":"Olga Alondra Echartea-Reyes, Gloria Verónica Vázquez-García, J. A. Castillo-Robles, J. López-Hernández, C. Calles-Arriaga, W. Pech-Rodríguez, E. Rocha-Rangel","doi":"10.3390/ceramics6030102","DOIUrl":"https://doi.org/10.3390/ceramics6030102","url":null,"abstract":"Materials known as Nd:YAG are crystalline materials of the cubic system made from the neodymium-doped yttrium aluminum garnet, which, among others, have excellent optical properties. Nd:YAG four-level laser devices are frequently used in both the health and industrial sectors. In this study, a simple and inexpensive alternative to manufacturing Nd:YAG materials through solid state reactions following powder processing routes was proposed. For this, an intense mixture of the precursor materials (Al2O3 and Y2O3) was carried out, followed by the addition of neodymium atoms to improve the optical properties of the resulting material. High-energy mechanical mixing of the precursor powders resulted in submicron particles with good size distributions of the powders. The advance of YAG formation was monitored by intermediate phase formation during heat treatment through interrupted tests at different temperatures and analysis by X-ray diffraction. From this analysis, it was found that reaction for the formation of the desired YAG is completed at 1500 °C. Fourier transform infrared spectroscopy analyses determined the presence of functional groups corresponding to the YAG. Finally, the study employing optical emission spectroscopy showed wavelengths in agreement with those of the electronic structure of the elements of the synthesized Nd:YAG.","PeriodicalId":33263,"journal":{"name":"Ceramics-Switzerland","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42364432","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

Water-Glass-Assisted Foaming in Foamed Glass Production 泡沫玻璃生产中的水玻璃辅助发泡

Ceramics-Switzerland Pub Date : 2023-08-02 DOI: 10.3390/ceramics6030101

Sonja Smiljanić, Uroš Hribar, Matjaž Spreitzer, Jakob König

引用次数: 0

Porous Ceramic ZnO Nanopowders: Features of Photoluminescence, Adsorption and Photocatalytic Properties 多孔陶瓷ZnO纳米粒子的光致发光、吸附和光催化性能

IF 2.8

Ceramics-Switzerland Pub Date : 2023-08-02 DOI: 10.3390/ceramics6030103

Marianna F. Gavrilova, Diana Gavrilova, S. Evstropiev, A. Shelemanov, I. Bagrov

{"title":"Porous Ceramic ZnO Nanopowders: Features of Photoluminescence, Adsorption and Photocatalytic Properties","authors":"Marianna F. Gavrilova, Diana Gavrilova, S. Evstropiev, A. Shelemanov, I. Bagrov","doi":"10.3390/ceramics6030103","DOIUrl":"https://doi.org/10.3390/ceramics6030103","url":null,"abstract":"The grainy and porous ZnO powders were synthesized by thermal decomposition of zinc nitrate and polymer-salt method. The comparative study of the crystal structure, morphology, luminescence, adsorptive and photocatalytic properties of ZnO powders was carried out. The addition of PVP in initial aqueous solutions of zinc nitrate determines the remarkable change of powder morphology and decreases the average size of ZnO nanocrystals. Luminescence spectra in the visible spectral range indicate the significant difference of structural defects types in grainy and porous powders. Porous powders demonstrate high ability for singlet oxygen photogeneration and photocatalytic properties. The kinetics of diazo dye adsorption on both powders is described successfully by the kinetic equation of pseudo-second order. Kinetic dependencies of photocatalytic oxidation of Chicago Sky Blue diazo dye using as grain ZnO powder so as porous ZnO powders are described by the Langmuir–Hinshelwood model but process rates are different. Porous ZnO powder demonstrates strong ability for photogeneration of singlet oxygen under visible irradiation and high photocatalytic properties (rate constant 0.042 min−1).","PeriodicalId":33263,"journal":{"name":"Ceramics-Switzerland","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42777175","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

Effect of Diamond Phase Dispersion on the Properties of Diamond-SiC-Si Composites 金刚石相分散对金刚石-碳化硅-硅复合材料性能的影响

IF 2.8

Ceramics-Switzerland Pub Date : 2023-07-28 DOI: 10.3390/ceramics6030100

S. P. Bogdanov, A. S. Dolgin, S. Perevislov, Nikolay A. Khristyuk, M. Sychov

引用次数: 0

Phase Composition and Magnetic Properties of Nanoparticles with Magnetite–Maghemite Structure 磁铁矿-磁铁矿结构纳米颗粒的相组成及磁性能研究

IF 2.8

Ceramics-Switzerland Pub Date : 2023-07-18 DOI: 10.3390/ceramics6030099

S. Andronenko, A. M. Nikolaev, Stanislav M. Suharzhevsky, A. A. Sinelnikov, Anastasia S. Kovalenko, A. Ivanova, O. Shilova

引用次数: 0

Zirconolite Matrices for the Immobilization of REE–Actinide Wastes 锆石基质固定化稀土-锕系元素废物

IF 2.8

Ceramics-Switzerland Pub Date : 2023-07-15 DOI: 10.3390/ceramics6030098

S. Yudintsev, M. Nickolsky, M. I. Ojovan, O. I. Stefanovsky, V. Malkovsky, A. S. Ulanova, L. R. Blackburn

引用次数: 0

Formation and Photophysical Properties of Silver Clusters in Bulk of Photo-Thermo-Refractive Glass 光热折射玻璃中银团簇的形成及其光物理性质

IF 2.8

Ceramics-Switzerland Pub Date : 2023-07-13 DOI: 10.3390/ceramics6030096

L. Mironov, D. Marasanov, M. D. Sannikova, K. Zyryanova, Artem A. Slobozhaninov, I. Kolesnikov

引用次数: 0

Bismuth-Germanate Glasses: Synthesis, Structure, Luminescence, and Crystallization 锗酸铋玻璃的合成、结构、发光和结晶

IF 2.8

Ceramics-Switzerland Pub Date : 2023-07-13 DOI: 10.3390/ceramics6030097

K. Serkina, I. Stepanova, A. Pynenkov, Maria Uslamina, K. Nishchev, K. Boldyrev, R. Avetisov, I. Avetissov

{"title":"Bismuth-Germanate Glasses: Synthesis, Structure, Luminescence, and Crystallization","authors":"K. Serkina, I. Stepanova, A. Pynenkov, Maria Uslamina, K. Nishchev, K. Boldyrev, R. Avetisov, I. Avetissov","doi":"10.3390/ceramics6030097","DOIUrl":"https://doi.org/10.3390/ceramics6030097","url":null,"abstract":"Bismuth-germanate glasses, which are well known as a promising active medium for broadband near-infrared spectral range fiber lasers and as an initial matrix for nonlinear optical glass ceramics, have been synthesized in a 5–50 mol% Bi2O3 wide concentration range. Their structural and physical characteristics were studied by Raman and FT-IR spectroscopy, differential scanning calorimetry, X-ray diffraction, optical, and luminescence methods. It has been found that the main structural units of glasses are [BiO6] and [GeO4]. The growth in bismuth oxide content resulted in an increase in density and refractive index. The spectral and luminescent properties of glasses strongly depended on the amount of bismuth active centers. The maximum intensity of IR luminescence has been achieved for the 5Bi2O3-95GeO2 sample. The heat treatment of glasses resulted in the formation of several crystalline phases, the structure and amount of which depended on the initial glass composition. The main phases were non-linear Bi2GeO5 and scintillating Bi4Ge3O12. Comparing with the previous papers dealing with bismuth and germanium oxide-based glasses, we enlarge the range of Bi2O3 concentration up to 50 mol% and decrease the synthesis temperature from 1300 to 1100 °C.","PeriodicalId":33263,"journal":{"name":"Ceramics-Switzerland","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44750859","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

Magnesium Oxide Powder Synthesis in Cathodic Arc Discharge Plasma in an Argon Environment at Atmospheric Pressure 常压氩气环境下阴极电弧等离子体合成氧化镁

IF 2.8

Ceramics-Switzerland Pub Date : 2023-07-11 DOI: 10.3390/ceramics6030095

D. Sorokin, K. Savkin, D. Beloplotov, V. Semin, A. Kazakov, A. Nikonenko, Alexander Cherkasov, Konstantin Shcheglov

{"title":"Magnesium Oxide Powder Synthesis in Cathodic Arc Discharge Plasma in an Argon Environment at Atmospheric Pressure","authors":"D. Sorokin, K. Savkin, D. Beloplotov, V. Semin, A. Kazakov, A. Nikonenko, Alexander Cherkasov, Konstantin Shcheglov","doi":"10.3390/ceramics6030095","DOIUrl":"https://doi.org/10.3390/ceramics6030095","url":null,"abstract":"Discharges with cathode spots can operate in a wide range of gas pressures. Erosion of the cathode material is an inherent property of such discharges. The erosion products are considered to be ionized atoms and electrically neutral microdroplets. In accordance with this concept, a plasma source based on a pulsed cathodic arc discharge in atmospheric-pressure argon with a current of up to 200 A, a pulse duration of 250 μs, and a pulse repetition rate of 10 Hz was implemented. Using this source, the synthesis of magnesium oxide powder was performed. The chemical composition of the erosion products was determined using the TEM/EDS method and the composition of the gas mixture in which the discharge system operated was evaluated by optical spectrometry. It was shown that particles of the synthesized powder have different morphological features, depending on the nature of the electrical erosion of the cathode material. Micron-sized particles are formed due to the removal of microdroplets from liquid–metal craters on the cathode surface at certain plasma pressures. Submicron particles are produced during the agglomeration of atoms originating from the plasma jets flowing out from cathode spots. These atoms are magnesium ions that are neutralized by collisions with gas particles. The advantages and disadvantages of this synthesis method are discussed in this paper. The reference methods for the powder synthesis of magnesium oxide are compared. The prospects of the studied method from the point of view of its application for obtaining ceramic materials are also evaluated.","PeriodicalId":33263,"journal":{"name":"Ceramics-Switzerland","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45592771","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