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α-Fe2O3 Nanoparticles/Vermiculite Clay Material: Structural, Optical and Photocatalytic Properties
Materials - Tập 12 Số 11 - Trang 1880
Marta Valášková, Jonáš Tokarský, Jiří Pavlovský, Tomáš Prostějovský, Kamila Kočí
Photocatalysis is increasingly becoming a center of interest due to its wide use in environmental remediation. Hematite (α-Fe2O3) is one promising candidate for photocatalytic applications. Clay materials as vermiculite (Ver) can be used as a carrier to accommodate and stabilize photocatalysts. Two different temperatures (500 °C and 700 °C) were used for preparation of α-Fe2O3 nanoparticle...... hiện toàn bộ
Effects of Rapid Thermal Annealing on the Structural, Electrical, and Optical Properties of Zr-Doped ZnO Thin Films Grown by Atomic Layer Deposition
Materials - Tập 9 Số 8 - Trang 695
Jingjin Wu, Yinchao Zhao, Ce Zhou Zhao, Li Yang, Qifeng Lu, Qian Zhang, Jeremy S. Smith, Yongming Zhao
The 4 at. % zirconium-doped zinc oxide (ZnO:Zr) films grown by atomic layer deposition (ALD) were annealed at various temperatures ranging from 350 to 950 °C. The structural, electrical, and optical properties of rapid thermal annealing (RTA) treated ZnO:Zr films have been evaluated to find out the stability limit. It was found that the grain size increased at 350 °C and decreased between ...... hiện toàn bộ
Effect of SiC Content on the Ablation and Oxidation Behavior of ZrB2-Based Ultra High Temperature Ceramic Composites
Materials - Tập 6 Số 5 - Trang 1730-1744
Ping Hu, Kaixuan Gui, Yang Yang, Shun Dong, Xinghong Zhang
The ablation and oxidation of ZrB2-based ultra high temperature ceramic (UHTC) composites containing 10%, 15% and 30% v/v SiC were tested under different heat fluxes in a high frequency plasma wind tunnel. Performance was significantly affected by the surface temperature, which was strongly dependent on the composition. Composites containing 10% SiC showed the highest surface temperature (...... hiện toàn bộ
Physical and Chemical Properties of Sintering Red Mud and Bayer Red Mud and the Implications for Beneficial Utilization
Materials - Tập 5 Số 10 - Trang 1800-1810
Ping Wang, Dongyan Liu
Performances of two common types of red mud, Bayer red mud and Sintering red mud, were investigated in this research. Their compositions, mechanical properties and microstructure characterization were measured through XRD, TG and SEM analysis. Their shear strength, particle size, density and hydraulic characteristics also had been performed. Huge differences between the basic mineral types...... hiện toàn bộ
Effect of Zeolite on Shrinkage and Crack Resistance of High-Performance Cement-Based Concrete
Materials - Tập 13 Số 17 - Trang 3773 - 2020
Thang, Nguyen Cong, Tuan, Nguyen Van, Yang, Keun-Hyeok, Phung, Quoc Tri
This study examined the effectiveness of zeolite addition to reduce the autogenous shrinkage of high-performance cement-based concrete (HPC). The zeolites were replaced up to 15% of the cement content by weight and their mean particle size varied from 5.6 to 16.7 µm. To evaluate the crack resistance of HPC containing zeolites, the ring tests and internal relative humidity measurements were perform...... hiện toàn bộ
Self-Flushing in EDM Drilling of Ti6Al4V Using Rotating Shaped Electrodes
Materials - Tập 12 Số 6 - Trang 989
M. Goiogana, Ahmed Elkaseer
This article reports an experimental investigation of the efficacy of self-flushing in the Electrical Discharge Machining (EDM) process in terms of tool wear rate (TWR), hole taper angle and material removal rate (MRR). In addition to a plain cylindrical shape, electrodes of different cross sections (slotted cylindrical, sharp-cornered triangular, round-cornered triangular, sharp-cornered ...... hiện toàn bộ
Combination of Poly(lactic) Acid and Starch for Biodegradable Food Packaging
Materials - Tập 10 Số 8 - Trang 952
Justine Muller, Chelo González‐Martínez, Amparo Chiralt
The massive use of synthetic plastics, in particular in the food packaging area, has a great environmental impact, and alternative more ecologic materials are being required. Poly(lactic) acid (PLA) and starch have been extensively studied as potential replacements for non-degradable petrochemical polymers on the basis of their availability, adequate food contact properties and competitive...... hiện toàn bộ
CdS/CdTe Heterostructures for Applications in Ultra-Thin Solar Cells
Materials - Tập 11 Số 10 - Trang 1788
K. Gutiérrez Z-B, P. G. Zayas-Bazán, O. de Melo, F. de Moure‐Flores, J.A. Andraca-Adame, Luis A. Moreno‐Ruiz, Hugo Martínez‐Gutiérrez, S. Gallardo‐Hernández, J. Sastré‐Hernández, G. Contreras‐Puente
The preparation of ultra-thin semi-transparent solar cells with potential applications in windows or transparent roofs entails several challenges due to the very small thickness of the layers involved. In particular, problems related to undesired inter-diffusion or inhomogeneities originated by incomplete coverage of the growing surfaces must be prevented. In this paper, undoped SnO2, CdS,...... hiện toàn bộ
Effect of the Degree of Conversion on Mechanical Properties and Monomer Elution from Self-, Dual- and Light-Cured Core Composites
Materials - Tập 14 Số 19 - Trang 5642
Branislava Petronijević Šarčev, Sebastian Baloš, Dubravka Marković, Ivan Šarčev, Marija Vukčević, Danka Labus Zlatanović, Vesna Miletić
The objective of this work was to measure and correlate the degree of conversion (DC), mechanical properties and monomer elution from self-, dual- and light-cured core composites. Five samples of each of the following materials were prepared for each test: Clearfil (Core, Photo Core, Automix), Bisco (Core-Flo, Light-Core and Bis-Core). DC was determined using FTIR, compressive and flexural...... hiện toàn bộ
Effects of Surface Treatments of Glass Fiber-Reinforced Post on Bond Strength to Root Dentine: A Systematic Review
Materials - Tập 13 Số 8 - Trang 1967
Lora Mishra, Abdul Samad Khan, Marilia Mattar de Amoêdo Campos Velo, Saurav Panda, Angelo Zavattini, Fábio Antônio Piola Rizzante, Heber Arbildo‐Vega, Salvatore Sauro, Monika Łukomska−Szymańska
The objective of this systematic review was to determine the influence of surface treatment of glass fiber posts on bond strength to dentine. Laboratory studies were searched in MEDLINE, PubMed, Embase, PubMed Central, Scopus, and Web of Science search engine. All authors interdependently screened all identified articles for eligibility. The included studies were assessed for bias. Because...... hiện toàn bộ
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