University of Chile, Chile
Description
Materials Technology Reports (MTR) is an open access journal of related scientific research and technology development. It provides a forum for the publication of reviews, regular research papers (articles), and short communications on fundamental science, engineering, and practical applications of materials. Our aim is to encourage scientists to publish their experimental and theoretical results in great detail. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.
Latest Articles
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Open Access
Article
Article ID: 1762
Potentiality of alginate-yeast biosorbent for biogas purificationby Norli Ismail, Bilhate Chala, Joachim Mueller, Hans Oechsner
Materials Technology Reports, Vol.2, No.2, 2024; 4199 Views, 3922 PDF Downloads
The paper discussed the current research on the applicability of biosorbents for the purification of biogas, particularly the decrease of H 2 S by using encapsulated or embedded biological biomass. This study investigated the potential of alginate-yeast biosorbent (AlgY) for biogas purification, focusing on hydrogen sulfide (H 2 S) removal. A biogas column test was conducted to compare the biosorption efficiency of AlgY and pure alginate beads. Using Response Surface Methodology (RSM), the effects of column length, acquisition time, and biosorbent type were evaluated for CH 4 , CO 2 , and H 2 S removal. Results depicted significant H 2 S reduction, with AlgY achieving a p -value of < 0.0001 and a high correlation coefficient ( R 2 = 0.9518). The relatively high correlation coefficient ( R 2 ) of the tested quadratic model of all the responses were recorded ( R 2 ; 0.5560, 0.5048, and 0.9518 for CH 4 , CO 2 , and H 2 S respectively). According to the studies’ preliminary findings, the type of biosorbent has a significant role in determining the biosorption effectiveness. The ANOVA of model terms depicted a significant p -value ( p < 0.05) indicated a potential alginate-yeast (AlgY) biosorbent for H 2 S purification or reduction.
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Open Access
Article
Article ID: 1699
Preparation and characterization of CuBO2-based photocatalysts and doped variantsby Soheila Azordeh, Mehdi Asadi, Abdolali Alemi
Materials Technology Reports, Vol.2, No.2, 2024; 4157 Views, 2623 PDF Downloads
An eco-friendly CuBO 2 -based photocatalyst has been doped by a lanthanide for the first time. Gd 3+ and Gd 3+ /Bi 3+ -doped CuBO 2 are synthesized by the hydrothermal method to study their magnetic properties. Then they are analyzed by XRD, UV-Vis, SEM, and VSM. The maximum amount of doping is x= 0 − 1.5% in Cu 1 – 3x Gd 3x BO 2 and Cu 1 – 3x Bi 3x/2 Gd 3x/2 BO 2 formulas as they are analyzed in XRD. For concentrations higher than x = 2%, the additional peak indicates that doping is incomplete. The XRD pattern of CuBO2 confirms that its crystal structure is a hexagonal one with the R3 ̅m space group. According to UV-Vis analysis, the bandgap energies are 2.711, 2.753, and 2.765 for CuBO 2 and doped systems. Additionally, the morphology of particle sizes is confirmed according to SEM images. Meanwhile, the magnetic properties of synthesized material are studied by VSM, and the doped compound exhibited higher magnetic properties than CuBO 2 , which is associated with the exchange interaction of electron and d spins in Gd 3+ and Bi 3+ . The study aims to provide insights into the magnetic properties of lanthanide-doped CuBO 2 -based photocatalysts, potentially paving the way for developing improved magnetic materials for various applications.
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Open Access
Article
Article ID: 1813
Study on the influence of aluminium nitride particulates on the dry sliding wear behavior and mechanical properties of aluminium 6061 alloy developed using stir casting methodby Raghavendra Subramanya, Manjunatha Kuntanahalli Narayanappa, Nagesh Devareddy, Madusudhana Shettykothanuru Vemanna, Ravikumar Mukundaiah, Chandra Shekar Anjinappa, Thyagaraj Narasapura Rajanna, Arun Kumar Rudrappa
Materials Technology Reports, Vol.2, No.2, 2024; 3944 Views, 2011 PDF Downloads
Aluminium matrix composites (AMCs) reinforced with hard ceramic particles is currently being widely used as a composite material for a range of industrial and technical applications. In the current study, melt stirring was employed to incorporate Aluminium nitride (AlN) particulates into the aluminium 6061 alloy. In this study AlN particles in different proportions 2%, 4%, 6%, and 8% wt were used with Al6061 alloy. Scanning electron microscopy (SEM) and x-ray diffraction were used to characterise the stir cast composites and the base alloy. SEM analysis confirmed the uniform distribution of AlN particles within the Al matrix. The impact of AlN concentrations on the mechanical properties of Al6061 matrix composites was investigated. Pin on disc machines were utilised to examine the dry sliding wear properties of the composites that were manufactured. The presence of very hard AlN elements in the Al6061 matrix alloy significantly improved the mechanical and wear characteristics of the AMCs. As compared to the Al6061 base alloy, the test results showed that the Al6061 with 8% weight percentage AlN composites had better wear resistance and hardness yield strength and the alloy with 2% AlN showed highest tensile strength of 368 MPa. The good interfacial adhesion between fillers and matrix prevents cracking and allows for effective load transmission to the reinforcing phase. This is mainly because AlN is a highly strong and stiff material, and its incorporation gives strong reinforcement as well as increased tensile, flexural, and hardness strength to the composite. This enhancement in mechanical properties suggests potential applications in high-wear industries such as automotive and aerospace.
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Open Access
Review
Article ID: 1879
Energy systems and green sourced nanomaterials—A today’s outlookby Ayesha Kausar
Materials Technology Reports, Vol.2, No.2, 2024; 3366 Views, 2472 PDF Downloads
Owing to current growing demands of environmental friendly energy devices, innumerable green materials/nanomaterials have been applied to design the desired high tech devices. Amongst energy devices, supercapacitors have been ranked distinctively for efficient energy storage competence. Principally, green nanocomposites derived from green or ecological polymers and green nanoparticles have been scrutinized for supercapacitor components. Concerning this, current review has been planned to sketch the energy storage application of green nanocomposites, predominantly for supercapacitors. In this concern, mostly synthetic green polymers (such as polyaniline, polypyrrole, etc.) and their blends with natural polymers (like chitosan) having fine biodegradability, non-toxicity, low cost, and superior device end performance have been found as the noteworthy materials. Additionally, green nanofillers like carbon nanoparticles (carbon nanotube, graphene, etc.) and metal nanoparticles have been processed with green polymers via ecological techniques, like in situ, solution, sonication, mixing, hydrothermal, exfoliation, reduction, etc., to form the anticipated energy device components. In consequence, the designed ecological nanocomposites expectedly had the advantages of low price/weight, superior mechanical/heat resilience, electron transference, capacitance, power/charge density, charge-discharge, sustainability as well as environmentally friendliness for energy related methodological systems. Incidentally, the design and performance challenges towards the application of ecological nanocomposites in energy storage devices have been conversed.
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Open Access
Article
Article ID: 1630
Microwave absorption properties and mechanism of novel apatite-type materials Mn₂Gd₇.₅Ce₀.₅(SiO₄)₆O₂by Haikun Liu, Xiaoming Liu, Ning Liu, Lefu Mei
Materials Technology Reports, Vol.2, No.2, 2024; 4278 Views, 1277 PDF Downloads
Manganese minerals possess a high intrinsic magnetic moment, making them excellent materials for microwave absorption. Rare earth elements, with their unique electronic structures and interactions between spin electrons and orbitals, can further enhance the performance of absorbing materials. In this study, we designed a novel microwave absorbing material by incorporating manganese into an apatite structure with adjustable chemical composition. The material Mn₂Gd₇.₅Ce₀.₅(SiO₄)₆O₂, exhibiting specific microwave absorption properties, was synthesized using a high-temperature solid-phase method. The results indicate that at a sample thickness of 5 mm, the absorption frequency bandwidth below −10 dB within the 2–12 GHz range reaches 1.2 GHz, with a peak absorption of −21.78 dB. Additionally, smaller particles were prepared using the sol-gel method, achieving a peak absorption of −39.75 dB. The primary absorption mechanism for both particle types is attributed to magnetic loss. This work presents a new approach to designing microwave absorbing materials and significantly contributes to expanding the range of apatite-type materials.
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Open Access
Review
Article ID: 1518
Current research status of high-performance UHMWPE fiber: A reviewby Lei Li, Fanmin Kong, Ang Xiao, Hao Su, Xiaolian Wu, Ziling Zhang, Yutian Duan
Materials Technology Reports, Vol.2, No.2, 2024; 4948 Views, 3333 PDF Downloads
In the relentless evolution of technological innovation, the incorporation of engineered materials across numerous sectors is becoming increasingly widespread. Among them, ultra-high molecular weight polyethylene (UHMWPE) fiber, as a novel type of engineered material, has emerged as a critical hot topic in industries such as aerospace, national defense, and new energy due to its exceptional physical and chemical properties. This article attempts to introduce the characteristics of UHMWPE fibers, including their advantages and areas for enhancement, to provide researchers with a comprehensive overview and research trajectory of UHMWPE. Moreover, this article succinctly elucidates the preparation methodologies and advances of UHMWPE fibers, encompassing mainstream dry and wet spinning methods, revealing their research trajectories, pivotal positions, and practical significance in the realm of engineered materials. In summary, this review briefly discusses the research overview and recent advances in UHMWPE fibers, which contribute to accelerating comprehensive and sustainable progress in this field.
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