Journal of Materials Science

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Crystallization kinetics of Ni-P glass — activation energies for nucleation and growth of nuclei
Journal of Materials Science - Tập 23 - Trang 3001-3005 - 1988
K. Lu, J. T. Wang
A pre-anneal treatment was introduced to a melt-spun Ni-P alloy. By crystallizing the asquenched and pre-annealed samples in a differential scanning calorimeter at different heating rates and isothermal process, the apparent activation energies for the total crystallization of the Ni-P samples were obtained by using the Kissinger technique and the Arrhenius relation. It was found that the apparent...... hiện toàn bộ
Characterization of clay composite ballistic witness materials
Journal of Materials Science - Tập 50 - Trang 7048-7057 - 2015
Jonathan E. Seppala, Yoonae Heo, Paul E. Stutzman, John R. Sieber, Chad R. Snyder, Kirk D. Rice, Gale A. Holmes
Mechanical and thermal properties of Roma Plastilina Clay #1 (RP1) were studied through small-amplitude oscillatory shear (SAOS), large-amplitude oscillatory shear (LAOS), and differential scanning calorimetry (DSC), supplemented with thermogravimetric analysis, X-ray diffraction, and X-ray florescence. Rheological characterizations of RP1 through SAOS indicate that the clay composite softens as i...... hiện toàn bộ
Fabrication and characterization of anisotropic dielectrics for low-loss microwave applications
Journal of Materials Science - Tập 43 - Trang 1505-1509 - 2008
Lanlin Zhang, Gokhan Mumcu, Salih Yarga, Kubilay Sertel, John L. Volakis, Henk Verweij
New magneto-photonic assembly designs for high-gain antennas require dielectrics with a significant anisotropy and low loss at GHz frequencies. This paper describes an approach to fabricate such dielectrics from ceramic laminates. These laminates consist of two ceramics with largely different permittivities and low dielectric losses. Alternating layers of commercially available α-Al2O3 and Nd-dope...... hiện toàn bộ
Sintering and properties of highly donor-doped barium titanate ceramics
Journal of Materials Science - Tập 35 - Trang 895-901 - 2000
S. Urek, M. Drofenik, D. Makovec
The electrical properties of donor (La3+) doped BaTiO3 samples with a donor concentration in the range from 0.3 to 1.5 mol.% of La were studied. Samples were sintered at a low partial pressure of oxygen in order to facilitate anomalous grain growth and donor incorporation. In order to optimise the PTCR anomaly, the samples were annealed in air at 1100°C. Results show that with the use of a specifi...... hiện toàn bộ
Interfacial properties of (Ag + CuO) brazes used as sealing materials in SOFC stacks
Journal of Materials Science - Tập 49 Số 1 - Trang 300-313 - 2014
Rallou Chatzimichail, G. Triantafyllou, Frank Tietz, P. Nikolopoulos
Supramolecular nanofiber-reinforced Puerarin hydrogels as drug carriers with synergistic controlled release and antibacterial properties
Journal of Materials Science - Tập 55 - Trang 6669-6677 - 2020
Wan Li
Hydrogels as drug carriers for delivery of antibiotics are rarely derived from natural molecules and often require complicated synthesis. Puerarin is an herbal natural product that can self-assemble to form pH-sensitive hydrogels without any structural modification. However, Puerarin hydrogels have poor thermostability and weak mechanical strength. In this work, we prepared N-(9-fluorenylmethoxyca...... hiện toàn bộ
Effect of double aluminium doping on the structure, stability and electronic properties of small gold clusters
Journal of Materials Science - Tập 50 - Trang 4586-4599 - 2015
Debajyoti Bhattacharjee, Bhupesh Kr. Mishra, Ramesh Ch. Deka
In this work, we have used density functional theory with PW91PW91 functional to analyse the structures, relative stabilities and electronic properties of small bimetallic neutral and charged Au n Al2 (n = 1–5) clusters. The results reveal that doping with two Al atoms can significantly affects the geometries of the ground-state Au n+2 (n = 1–5) ...... hiện toàn bộ
Cellulose nanocrystals and self-assembled nanostructures from cotton, rice straw and grape skin: a source perspective
Journal of Materials Science - Tập 48 Số 22 - Trang 7837-7846 - 2013
You‐Lo Hsieh
Synthesis and electrochemical performance of gold nanoparticles deposited onto a reduced graphene oxide/nickel foam hybrid structure for hydrazine detection
Journal of Materials Science - - 2020
Wenda Wang, Zhenting Zhao, Haoyue Yang, Pengwei Li, Zhichao Yu, Wendong Zhang, Jian Shi, Jie Hu, Yong Chen
In this paper, an ultrahigh sensitive hydrazine electrochemical sensor based on gold nanoparticles integrated into a reduced graphene oxide/nickel foam (AuNPs-rGO@NF) hybrid structure was synthesized using a facile coating and electrochemical deposition method. The morphology and elemental composition of the as-synthesized AuNPs-rGO@NF structure was comprehensively investigated. Both cyclic voltam...... hiện toàn bộ
Sintering and crystallization behaviour of a glass powder and block with a composition of anorthite and the microstructure dependence of its thermal expansion
Journal of Materials Science - Tập 29 - Trang 3323-3328 - 2004
Bongi Ryu, Itaru Yasui
Two kinds of glass specimens were prepared in the form of powders and blocks with anorthite compositions, and an examination was made of the sintering and crystallization behaviour of the specimens and the microstructure dependence of their thermal expansion. It was found that the addition of a few wt% of Ti02 was necessary to obtain a good sintered body by heat treatment at 1050°C. Specimens with...... hiện toàn bộ
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