Materials Literature
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The ceramic composites containing 1-25 vol% BaTiO3 in a ferrite matrix phase of Ni0.3Zn0.7Fe2O4 were fabricated by sintering at 1250°C in air. The sintered composites indicated a steep increase in dielectric permittivity in a small BaTiO3 ratio up to 5 vol%. In a limited BaTiO3 ratio of 3-15 vol%, a reaction between N…
Chloride-laden and carbonated environments were selected for the investigation of corrosion acceleration due to galvanic corrosion of normal rebars in contact with corrosion-resistant Cr-bearing rebars embedded in concrete. Concrete specimens simulating these environments were fabricated using normal steel (SD345) reb…
Nanocrystalline powder of the single phase nickel‐zinc ferrite have been prepared by a sol‐gel auto‐combustion process. The nitrate‐citrate gels were prepared from metal nitrates and citric acid solutions with various molar ratios of the metal nitrates to citric acid. The results showed that the nitrate citrate gels e…
In a previous work, the measurement of radiative vacancy transfer probabilities from the K shell to the L sub‐shells were measured, when rare earth elements were irradiated with 3 MeV–4 MeV protons. It was found that those probabilities did not depend on the ion energy and there was a close agreement with theoretical…
強制薄膜式リアクターを用いて粒子径が数～10 nmの銅フタロシアニンナノ粒子を作製した。手法は，銅フタロシアニンを濃硫酸に溶解し，純水に希釈することで銅フタロシアニンを析出させるアシッドペースティング法を用いた。得られた銅フタロシアニンナノ粒子は，従来の報告のとおりアシッドペースティング法にて得られるα型の結晶型であったが，紫外－可視領域における光学特性として，従来の銅フタロシアニンには認められない透過，吸収特性をもつことを見いだした。
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Christian R. Segebade, Wolf Goerner; Photon Activation Analysis—An Analytical Application Of High…
Displacement cascades in zirconia have been studied using classical molecular dynamics simulations. Polycrystalline zirconia with nano‐meter grains were created using Voronoi polyhedra construction and studied in comparison with single crystalline zirconia. The results show that displacement cascades with similar kine…
The exceptional stability of the latest generation of electron microscopes has allowed off‐axis electron holography to become a relatively straightforward technique to perform experimentally. In addition, focused ion beam milling can be used to prepare a thin TEM specimens that contain an individual devices with nm‐sc…
Parametric X‐rays (PXR) are produced from the interaction of relativistic electrons with the periodic structure of crystal materials. Smooth X‐ray energy tunability is achieved by rotating the crystal with respects to the electron beam direction. Experiments at the Rensselaer Polytechnic Institute 60‐MeV LINAC produce…
Polymer piezoelectric materials offer lower density and more flexibility than piezoelectric ceramics for applications where rugged and lightweight acoustic sensors are required. This paper discusses constraints imposed by material stiffness and dielectric constants and aims to derive a generalized closed‐form solution…
After the second half of the twentieth century there was a great growth in the understanding of the microstructure of materials, and it was only possible through the discovery of new techniques for characterization of materials. Today there is a number of direct and indirect techniques to characterize samples such as…
Variable cryptocrystalline silica varieties occur en masse in the fractures and cavities of the andesite host rock, showing different genetic and morphological features of variable microbial activity. Four types of CL features characterized silica phases. Raman spectroscopy supported variable amorphous carbon phases i…
Layered nanocomposites of V1.67Ti0.33O5±δ •nH2O gels are synthesized by using sol-gel technology.Then an aqueous solution of hydroquinone (HQ) was mixed with the formed gel in molar ratio 0.33 : 1 and 0.17 : 1 respectively.In this way the V1.67Ti0.33O5±δ •nH2O / 2HQ and V1.67Ti0.33O5±δ •nH2O / HQ gels were synthesized…
I am very grateful to my thesis advisor, Prof. Raj Suryanarayanan, for his constant guidance, support, and encouragement throughout my research. Without his help, the completion of this thesis would be impossible. His friendship and advices are precious to my professional and personal growth and will help me overcome…
This work examines the processing and mechanical properties of graphite compacts electroplated by a copper layer. Natural graphite (NG) flakes have been compressed to make graphite compacts. A copper electrodeposit has been applied to the surface of the graphite compact in order to reinforce the mechanical properties…
"The capacity of manipulating matter at the nanoscale has opened a great potential for diverse type of applications and novel innovations, going from new materials for the textile, packaging or food industry, all the way to sophisticated medical procedures and treatments. The economical potential seems to be of major…
The austenite of the Hadfield type manganese steels (1.0–1.4% C; 12–14% Mn), even though able to be hardened by impact, explosion, etc., is very ductile, tough and deformable, so that the industrial parts made with this material often suffer important geometric deformations during service. To minimize this problem, it…
Met de zogenoemde BetonBallon kunnen gewelven of schalen op een economische manier in het werk worden gerealiseerd. Als bekisting wordt een grote voorgevormde ballon toegepast. Eind oktober 2008 is op de campus van de TU Eindhoven een eerste prototype gebouwd. Mede door minimaal materiaalgebruik blijkt het een duurzam…
We have developed Barium Strontium Tinanate (BST) doped by Indium as soft dopant on Pt/Si substrate using chemical solution deposition method followed by spin coating. The specimen is then examined by XRF to identify the chemical content, SEM to study the morphology of the films, XRD to calculate the grain size, and e…