Masatomi Sakamoto、P. Nunziante、Enrico Traversa 等 7 位作者1997-01-01Journal of the Ceramic Society of Japan
Heteronuclear complexes of Ln[FexCo1-x(CN)6]⋅4H2O (Ln=Pr-Yb) were synthesized and their thermal decomposition products were investigated. Thermal decomposition of the complexes results in the formation of perovskite-type oxides for Ln=Pr-Gd even at 800°C. The lattice parameters, a-, b- and c-lattice constants (crystal…
Ferroelectric and Piezoelectric MaterialsInorganic Chemistry and MaterialsThermal Expansion and Ionic Conductivity
A.C. Gjaerde1997-01-01IEEE Transactions on Dielectrics and Electrical Insulation
A new aging model for thermal-electrical aging is proposed. The combined effect of temperature and partial discharges was investigated using epoxy samples. The new model is based on measurements of void gas pressure and time-to-breakdown experiments. This approach is quite opposite to other aging models in that the ne…
High voltage insulation and dielectric phenomenaDielectric materials and actuatorsElectrostatic Discharge in Electronics
I.W. McAllister1997-01-01IEEE Transactions on Dielectrics and Electrical Insulation
Partial discharge transients can be described in terms of the charge induced on the detecting electrode. The influence of the void parameters upon the induced charge is examined and discussed for spheroidal voids. It is shown that a quantitative interpretation of the induced charge requires a knowledge not only of the…
Gas Sensing Nanomaterials and SensorsHigh voltage insulation and dielectric phenomenaPlasma Diagnostics and Applications
Bo B. Iversen、Finn Larsen、Brian N. Figgis 等 4 位作者1997-01-01Journal of the Chemical Society Dalton Transactions
A quantitative description of transition-metal bonding has been obtained through combined analysis of 9(1) K X-ray and 13(1) K time-of-flight neutron diffraction data. It is shown that a simple valence-orbital model is too crude an approximation adequately to describe the electron-density distribution of Ni(ND 3 ) 4 (…
Crystallography and molecular interactionsBlock Copolymer Self-AssemblyX-ray Diffraction in Crystallography
Carsten Tschierske、Frank Hildebrandt、Jörg Andreas Schröter 等 6 位作者1997-01-01Advanced Materials
The liquid‐crystalline behavior of rod‐like mesogens is normally associated with the formation of smectic layer structures. However, it is shown that the introduction of large hydrophilic groups in a lateral position, such as in the Figure, can lead to columnar mesophases. The formation of columnar mesophases by rod‐l…
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsMolecular spectroscopy and chirality
Hansjörg Kielhöfer1997-01-01Proceedings of the Royal Society of Edinburgh Section A Mathematics
We investigate critical points of the free energy E ε (u) of the Cahn–Hilliard model over the unit square under the constraint of a mean value ü. We show that for any fixed value ü in the so-called spinodal region and to any mode of an infinite class, there are critical points of E ε (u) having the characteristic symm…
Solidification and crystal growth phenomenaAdvanced Mathematical Modeling in EngineeringFluid Dynamics and Thin Films
V.Y. Gertsman、Alexander P. Zhilyaev、Jerzy A. Szpunar1997-01-01Modelling and Simulation in Materials Science and Engineering
Possible grain boundary structures and distributions in monoclinic zirconia are discussed. Crystallogeometrical analysis was employed to evaluate some special, low-energy boundaries in the material. A computer simulation was then used to model the grain boundary misorientation and character distributions based on cert…
Advanced ceramic materials synthesisMicrostructure and mechanical propertiesAdvanced materials and composites
Akemi Ryu、Eiji Naru、Kumi Arakane 等 8 位作者1997-01-01Chemical and Pharmaceutical Bulletin
Singlet oxygen (1O2), a highly reactive and toxic intermediate, may play a role in photo-induced aging. We examined singlet oxygen generation from hematoporphyrin (HP) with UV-A, by monitoring the emission at 1,268 nm corresponding to 1O2 --> 3O2. Singlet oxygen was formed HP-dose-dependently in this system. We then i…
Collagen: Extraction and Characterization
Philip A. Reynolds、Boujemaa Moubaraki、Keith S. Murray 等 6 位作者1997-01-01Journal of the Chemical Society Dalton Transactions
Single-crystal magnetisation and polarised neutron diffraction (PND) measurements have been made for the complex cis-[ReCl 4 (NHCMeNHPh) 2 ]. At higher temperatures the magnetic behaviour is typical of such a rhenium-(IV) complex, with three unpaired spins (µ = 3.6 µ B ), an almost isotropic g-tensor of 1.86(1) and a…
Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesMachine Learning in Materials Science
Yunming Wang、Tsann-Hwang Cheng、Gin Chung Liu 等 4 位作者1997-01-01Journal of the Chemical Society Dalton Transactions
Three N,N″-bis(amide) derivatives of H 5 dtpa (diethylenetriamine-N,N,N′,N ″,N″-pentaacetic acid), H 3 L 1 = bis- (isopropylamide), H 3 L 2 = bis(tert-butylamide) and H 3 L 3 = bis(benzylamide), were synthesized. Their protonation constants were determined by potentiometric titration in 0.10 mol dm -3 KCl and by NMR p…
Analytical chemistry methods developmentMolecular Sensors and Ion DetectionLanthanide and Transition Metal Complexes
Chun‐Guey Wu、Ching-Yuh Chen1997-01-01Journal of Materials Chemistry
In-situ deposition of conducting polypyrrole thin films on an insulating substrate has been achieved by chemical polymerization of pyrrole on a modified surface. The surface modification agent was a silane compound bearing a pyrrole group; C 4 H 4 NC 3 H 6 Si(OMe) 3 which attached to the SiO 2 -Si surface via molecula…
Electrochemical sensors and biosensorsConducting polymers and applicationsAnalytical Chemistry and Sensors
J.R. Nicholls、H.E. Evans、S. R. J. Saunders1997-01-01Materials at High Temperatures
Mechanical damage to thin, protective oxide layers arises principally in service from differential strains produced by temperature changes. For typical alumina- or chromia-forming alloys, in-plane tensile stresses are developed within the oxide layer during upward temperature transients and compressive stresses are pr…
Advanced ceramic materials synthesisNuclear Materials and PropertiesNuclear materials and radiation effects
Ralph Lunkwitz、Carsten Tschierske、Arne Langhoff 等 5 位作者1997-01-01Journal of Materials Chemistry
Liquid crystalline alkane-3,4-dienoates (allenylacetates) have been synthesized. Most compounds incorporate a heterocyclic 1,3,4-thiadiazole ring or a pyrimidine ring as a constituent of the rigid core. These axial chiral allene derivatives were at first obtained as racemic mixtures. Some of them were also synthesized…
Liquid Crystal Research AdvancementsSynthesis and Properties of Aromatic CompoundsMolecular spectroscopy and chirality
John W. Goodby1997-01-01Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals/Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals
Physical theories concerning the structures and properties of chiral smectic liquid crystals abound, however, very few are of practical use in the design and subsequent synthesis of materials. The development of macroscopic theories, although very useful in the explanation of physical phenomena, are not readily transf…
Liquid Crystal Research AdvancementsSynthesis and Properties of Aromatic CompoundsMolecular spectroscopy and chirality
Anirban Dutta1997-01-01The Journal of Physical Chemistry B
This paper reports the incorporation of a nonamphiphilic blue laser dye 2,2‘- p -phenylenebis(5-phenyloxazol), abbreviated as POPOP, in Langmuir−Blodgett (LB) films mixed with stearic acid (SA) and their spectroscopic properties. The surface pressure versus area per molecule isotherms of POPOP mixed with SA at differe…
Porphyrin and Phthalocyanine ChemistryNonlinear Optical Materials ResearchPhotochromic and Fluorescence Chemistry
Sirpa K. Nelo、Kaisu M. Leskelä、J. Sohlo1997-01-01Chemical Engineering & Technology
Abstract The use of ozone and hydrogen peroxide for the simultaneous oxidation of nitrogen and sulfur oxides was studied in experiments carried out in a stirred cell. It was found that in a gas mixture, containing both nitrogen and sulfur oxides, only the nitrogen oxides are oxidized by ozone. Contrary to earlier resu…
Catalytic Processes in Materials ScienceCatalysis and Oxidation ReactionsIndustrial Gas Emission Control
S. Granado、Victoria Ragel、M.V. Cabañas 等 5 位作者1997-01-01Journal of Materials Chemistry
In order to test the influence of ceramic morphology and particle size on the behaviour of the ceramic/polymer/drug composite α-Al 2 O 3 /poly(l-lactic acid)/poly(methyl methacrylate)/ibuprofen (α-Al 2 O 3 /PLLA/PMMA/IB) containing the antiinflammatory drug ibuprofen, have been studied. We have used α-alumina synthesi…
Polymer Nanocomposites and PropertiesInjection Molding Process and Properties
Siddharth Ramachandran、J.C. Pepper、David J. Brady 等 4 位作者1997-01-01Journal of Lightwave Technology
A detailed study of the wavelength dependence of the formation of lenslets by photo-expansion in chalcogenide glasses is reported. Photo-expansion in chalcogenide glasses offers a one-step fabrication process to record surface structures such as gratings and microlenses. The process is purely optical and requires no f…
Phase-change materials and chalcogenidesSemiconductor Lasers and Optical DevicesAdvanced optical system design
H. J. Bunge1997-01-01Texture Stress and Microstructure
Classical Powder Diffraction usually assumes samples with completely random orientation distribution of the crystallites. It can be generalized to non‐random orientation distribution (texture) by introducing a texture factor which enters the expression of the integral intensity directly and serves as a weight function…
Crystallography and molecular interactionsSolid-state spectroscopy and crystallographyX-ray Diffraction in Crystallography
Tsuyoshi Kawanami、Masahiko Yamada、Shoichiro FUKUSAKO 等 4 位作者1997-01-01Heat Transfer - Japanese Research
An experimental and numerical study of solidification characteristics of a droplet on a horizontal cooled wall is reported. Pure water and molten salt were utilized as the testing liquids. The droplet was cooled under a variety of conditions such as wall temperature and initial liquid temperature in a static atmospher…
Solidification and crystal growth phenomena