Guojun Zhang、Jianfeng Yang、Tatsuki Ohji2002-09-01Journal of the American Ceramic Society
Thermogravimetry, differential thermal analysis, mass spectrometry, and X‐ray diffractometry were used to study the reaction process of the in situ reaction between Si 3 N 4 , B 4 C, and carbon for the synthesis of silicon carbide–boron nitride composites. Atmospheres with a low partial pressure of nitrogen (for examp…
Advanced ceramic materials synthesisBoron and Carbon Nanomaterials ResearchAdvanced materials and composites
H. W. L. Naus2002-09-01IEEE Transactions on Magnetics
The Jiles-Atherton model of the behavior of ferromagnetic materials determines the irreversible magnetization from the effective field by using a differential equation. This paper presents an exact, analytical solution to the equation, one displaying hysteresis. The inclusion of magnetomechanical couplings for various…
Microstructure and Mechanical Properties of SteelsMagnetic Properties and ApplicationsNon-Destructive Testing Techniques
Zhang Ronghua、Shumin Hu、Yanfeng Su2002-09-01Acta Geologica Sinica - English Edition
Abstract This study reports the kinetic experimental results of albite in water and in KCl solution at 22 MPa in the temperature range of 25 to 400°C. Kinetic experiments have been carried out in an open flow‐through reaction system (packed bed reactor). Albite dissolution is always incongruent in water at most temper…
Groundwater flow and contamination studiesCO2 Sequestration and Geologic InteractionsClay minerals and soil interactions
Blas P. Uberuaga、Graeme Henkelman、HANNES J�NSSON 等 6 位作者2002-09-01physica status solidi (b)
Density functional theory studies have been performed to investigate the mechanisms of self-diffusion in Ge and the clustering of B in Si. In the case of self-diffusion of Ge, we find within the harmonic transition state theory a diffusion prefactor for the vacancy mechanism which is in good agreement with experimenta…
Silicon and Solar Cell TechnologiesSilicon Nanostructures and PhotoluminescenceSemiconductor materials and interfaces
Р. С. Бубнова、Ju. F. Shepelev、Natalia Sennova 等 4 位作者2002-09-01Zeitschrift für Kristallographie - Crystalline Materials
Abstract The crystal structure of the α-Na 2 B 8 O 13 stable modification has been refined by single crystal X-ray diffraction at 293, 573 and 773 K. The compound is monoclinic, P 2 1 / a space group, unit-cell parameters at 273 K are: a =6.507(3), b =17.796(8), c =8.377(5) Å, β =96.60(4)°, Z =4. The structure contain…
Zeolite Catalysis and SynthesisNuclear materials and radiation effectsThermal Expansion and Ionic Conductivity
Peter Komadel、Jana Hrobáriková、Ľ. Smrčok 等 4 位作者2002-09-01Clay Minerals
Abstract A series of reduced-charge montmorillonites with cation exchange capacities of 89, 73, 49 and 29% of the starting mineral was prepared from a Li-saturated smectite (Kriva Palanka, Republic of Macedonia) by heating at 110, 130, 160 and 300 ° C for 24 h (samples KP110 – KP300, respectively). Hydration propertie…
Concrete and Cement Materials ResearchSoil and Unsaturated FlowClay minerals and soil interactions
John Bogaard、Paul M. Whitmore2002-09-01Studies in Conservation
The control of relative humidity is generally recognized as an important consideration in the proper storage and display of paper materials. However, the amount that the humidity can fluctuate and the rate at which it can change without causing damage are still unknown. In this study, samples of cotton filter paper (W…
Advanced Cellulose Research StudiesCultural Heritage Materials AnalysisMaterial Properties and Processing
Gary Ferrell、Lawrence A. Crum2002-09-01The Journal of the Acoustical Society of America
Cavitation is an effective physical mechanism for concentrating mechanical energy. Accordingly, it has wide applications in such diverse fields as sonochemistry, in which chemical reactions are initiated or accelerated, or in the electronic component cleaning industry in which particles (and other materials) are remov…
Ultrasound and Hyperthermia ApplicationsUltrasound and Cavitation PhenomenaMicrowave-Assisted Synthesis and Applications
E. A. Kumoto、R. O. Alhadeff、Marcelo Aquino Martorano2002-09-01Materials Science and Technology
Specimens of the peritectic alloy Cu–10 wt-%Sn were subjected to various cooling rates typically observed in industrial casting processes. Some of the specimens were quenched immediately after the end of solidification to avoid further solute homogenisation of the dendrite structure during cooling to room temperature.…
Aluminum Alloy Microstructure PropertiesSolidification and crystal growth phenomenaMetallurgy and Material Science
Min Zhi Rong、Ming Qiu Zhang、Yuan Liu 等 6 位作者2002-09-01Polymers and Polymer Composites
The authors discuss the water absorption behaviour of sisal and its epoxy based composites and the mechanical properties of composites that have been aged in water. In addition, a series of fibre pretreatment techniques, including mercerization, acetylation, cyanoethylation, coupling agent treatment and thermal treatm…
Natural Fiber Reinforced Composites
Alberto Scurati、Ica Manas‐Zloczower、Donald L. Feke2002-09-01Rubber Chemistry and Technology
Abstract The effect of surface treatment on silica agglomerate dispersibility was investigated. Precipitated silica powders were treated with a commercially available coupling agent Bis-(triethoxysilylpropyl)-tetrasulphane (TESPT) in a blender. Spherical agglomerates of known density were prepared and dispersed in sty…
Polymer Nanocomposites and PropertiesSurfactants and Colloidal SystemsPetroleum Processing and Analysis
Andreas Eichhöfer、E. Tröster2002-09-01European Journal of Inorganic Chemistry
The reaction of HgCl2 and PPh2nPr with PhSeSiMe3 and Se(SiMe3)2 in THF at −30 °C results in the formation of yellow octahedral crystals of [Hg10Se4(SePh)12(PPh2nPr)4]. The molecular structure of the cluster is similar to structures of other [M10Se4(SePh)12(PR3)4] (M = Cd, Zn; R = organic group) cluster compounds altho…
Quantum Dots Synthesis And PropertiesCrystal Structures and PropertiesNanocluster Synthesis and Applications
Maguy Jaber、Jocelyne Brendlé、Ronan Le Dred2002-09-01Chemistry Letters
Abstract Adsorbent material with a layered structure was obtained at room temperature. The synthesis involves the reaction of three ethanolic solutions (3-mercaptopropyltrimethoxysilane, aluminum acetylacetonate and magnesium nitrate). This is the first example of organophyllosilicate having Al in the tetrahedral and…
Mesoporous Materials and CatalysisClay minerals and soil interactionsChemical Synthesis and Characterization
Darryl D. Siemer2002-09-01Materials Research Innovations
A “hydroceramic” (HC) is a concrete which possesses mineralogy similar to the zeolitized rock indigenous to the USA's current “basis” high level radioactive waste (HLW) repository site, Yucca Mountain (YM). It is made by curing a mixture of inorganic waste, calcined clay, vermiculite, Na2S, NaOH, plus water under hydr…
Concrete and Cement Materials ResearchNuclear materials and radiation effectsGraphite, nuclear technology, radiation studies
Kosuke Nagashio、Kazuhiko Kuribayashi2002-09-01Journal of the American Ceramic Society
Containerless processing was used to investigate the glass‐forming behavior of Al 2 O 3 –Y 2 O 3 glass. The amorphous bulk samples were obtained at compositions with 25–37.5 mol% yttria when the melt was cooled at a cooling rate of ∼250 K/s. Although small spherical particles (∼10 μm) with the same composition of the…
Material Dynamics and PropertiesGlass properties and applicationsMetallic Glasses and Amorphous Alloys
Marco Antônio da Cunha、Sebastião C. Paolinelli2002-09-01Materials Research
To study the effect of the annealing temperature on the structure and magnetic properties of a 2%Si non-oriented steel cold rolled samples were submitted to final annealing in the temperature range of 540 °C to 980 °C in hydrogen atmosphere. The samples had received cold rolling reduction of 75% to a final thickness o…
Microstructure and Mechanical Properties of SteelsMetallic Glasses and Amorphous AlloysMagnetic Properties and Applications
B. Mamat、Annette Roth、Clemens Grimm 等 8 位作者2002-09-01Protein Science
Formyltransferase catalyzes the reversible formation of formylmethanofuran from N(5)-formyltetrahydromethanopterin and methanofuran, a reaction involved in the C1 metabolism of methanogenic and sulfate-reducing archaea. The crystal structure of the homotetrameric enzyme from Methanopyrus kandleri (growth temperature o…
Metabolism and Genetic DisordersEnzyme Structure and FunctionAmino Acid Enzymes and Metabolism
D. Vasilevskiy、A. Sami、J.-M. Simard 等 4 位作者2002-09-01Journal of Applied Physics
We present the electrical transport properties of thermoelectric n-type Bi2(Te1−xSex)3 (x⩽0.125) polycrystalline alloys obtained by mechanical alloying and extrusion. It was determined that the charge carrier mobility decreases in the temperature range 90–300 K as the content (x) of Bi2Se3 is increased. The observed d…
Advanced Thermoelectric Materials and DevicesThermal properties of materialsAdvanced Thermodynamics and Statistical Mechanics
Jean-Louis Courouau、P. Deloffre、René Adriano2002-09-01Journal de Physique IV (Proceedings)
International audience
Advancements in Solid Oxide Fuel CellsNuclear materials and radiation effectsElectrical and Thermal Properties of Materials
Li Cui、Vytenis Sapagovas、Günter Lattermann2002-09-01Liquid Crystals
A range of new pyridinium bromides was synthesized by the quaternization of different substituted pyridines with a group containing a biphenyl core and alkyl chains of differing lengths. The phase behaviour of the pyridinium bromides was studied by differential scanning calorimetry, polarizing optical microscopy and p…
Liquid Crystal Research AdvancementsIonic liquids properties and applicationsSurfactants and Colloidal Systems