Materials Literature
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Some FeTPP−Cl/carbon electrocatalysts, heat-treated at temperatures up to 800 °C, have been studied with cyclic voltammetry, x-ray photoelectron spectroscopy, extended X-ray absorption fine structure, and in situ Mössbauer spectroscopy. It appears that the heat treatment induces considerable site heterogeneity in elec…
We use extended Mie theory to investigate optical forces induced by and acting on small silver nanoparticle aggregates excited at surface plasmon resonance. It is shown that single molecules can be trapped at junctions between closely spaced nanoparticles, which are simultaneously pulled together by optical forces. Th…
An autocatalytic electroless gold process suitable for electronic packaging applications, particularly wirebonding needs, is described. This process yields high purity, non porous soft gold of any thickness that meets or exceeds all military specifications. The process can be used for a wide variety of organic laminat…
The non complete charge collection efficiency observed in Semi-Insulating (SI) Gallium Arsenide (GaAs) particle detectors has been generally attributed to trapping effects. However most of the detectors analyzed in literature can only operate below the depletion voltage. We present a careful analysis of the output sig…
Recent improved of larger-scaled microwave devices at the field such as communication systems demand a high-performance wiring substrate which has high thermal conductivity and good high-frequency characteristics. Aluminum nitride (AlN) has been considered a hopeful candidate to meet these demands because of its high…
We studies the surface characteristics and mechanical properties of four brands of poly(ether urethane) feeding tubes incubated for eight weeks at 37/spl deg/C in simulated gastric juice. Surface degradation was characterized by scanning electron microscopy and energy dispersive spectroscopy (SEM/EDS). Changes in mech…
This paper describes it method for monitoring electromigration (EM) resistance of multilayered metal interconnects which have been widely used in recent LSI technologies. We studied the combination of SWEAT (Standard Wafer-Level Electromigration Acceleration Test) patterns and the BEM (Breakdown Energy of Metal) metho…
The Safety Interlock System (SIS) at the Synchrotron Radiation Research Center (SRRC) is introduced. SIS is designed to protect people from exposure to accidental high radiation. It is composed of three subsystems. The Access Control System (ACS) prevents people from being exposed to the extremely high radiation insid…
The paper describes a non-destructive electro-optical diagnosis concept of partial discharges in solid dielectrics. The aim of the measurements is to localise the partial discharges, to gain information about the power density of the discharges and the correlation with the damage of the dielectric surface. This makes…
The pulsed electro-acoustic method was used as a nondestructive measurement technique of space charge distribution in dielectric materials. In our work presented here, we measured simultaneously the space charge distribution and conduction current in the low-density polyethylene samples with elevated temperatures up t…
Although the fast breeder reactor (FBR) was developed by many countries as the economical nuclear reactor, many countries have stopped developing FBR, except France and Japan, for economic reasons. Nuclear power is important for Japan as a source of energy, therefore Japan will continue to investigate nuclear energy s…
This paper is devoted to electrical and photoelectrical properties of silicon MIS structures with REO insulator such as yttrium, lutetium and samarium oxide films. Interface properties and barrier energies of metal-REO and silicon-REO interfaces are the subject of these investigations.
This paper describes the fundamental characteristics of EPDM (ethylene propylene rubber) which is applied as a high voltage insulation material. Also recently, polymer compounds have been applied as high voltage insulation materials. EPDM rubber is inferior in weather resistance to silicone rubber. However, we found t…
Ultrashort pulse pump−probe and transient anisotropy methods are used to study polaron dynamics of primary doped conductive polyaniline in solution. The degenerate frequency pulses are resonant with the polaron absorption of the emeraldine salt form of polyaniline. Pronounced oscillatory components with frequencies of…
A new reaction calorimeter has been developed for measuring the kinetics of reactions accompanied by small thermal effects. For kinetic purposes, the calorimeter was calibrated by simulating the heat flow in accord with a certain kinetic equation. This was accomplished by applying a software-controlled voltage to a re…
Medical grade silicone rubber has been developed for use as a material for the fabrication of medical implant devices. It has high performance, strength, elongation and very resistant to flaws and crack propagation with an excellent fatigue flex life. The toxicological/biocompatibility studies such as systemic toxicit…
Electrical treeing tests at divergent field are a tool for the characterization of insulating materials which has been extensively studied in the recent years. The divergent field is generally obtained by means of point plane electrode geometries, where the point (needle) electrode can be either conductive or semicond…
The acquisition, storage and processing of partial discharge (PD) signals is widely used as a condition monitoring tool to determine the integrity of the solid insulating systems of high power plants. Despite the advances in the instrumentation available for this purpose, the ability of partial discharge data to provi…
This paper presents the research aid development results on surface corona suppression systems in high voltage large generator stator winding end turns. Theoretical analysis on the physical phenomena of the surface corona in stator end turns is described. The important physical parameters of surface corona suppression…
Abstract The functionalization of polyethylene was realized by the thermal decomposition of peroxyesters in molten polymer in the absence of any other additive. Ester and acid functions were introduced onto the polymer operating with various peroxyesters. This grafting resulted from the combination of a polymer radica…