Thermal physics
Thermal Physics is written for students studing the core Thermal Physics/Thermodynamics modules(s) at 2nd/3rd year UK undergraduate level. Thermal Physics deals with the transfer of energy to, from an
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Sind Hochtemperatursupraleiter nützlich?
Abstract Die neuen Supraleiter‐Materialien mit Sprungtemperaturen oberhalb der Siedetemperatur des flüssigen Stickstoffs werden bereits im vierten Jahr nach ihrer Entdeckung im Bereich der Hochfrequenztechnik eingesetzt. Im Hinblick auf Anwendungen in der Magnet‐ und Energietechnik ist jedoch noch einiges an Entwicklu…
Ordering of interstitial oxygen atoms in La2NiO4+ delta
Two types of homologous series of superstructures have been found for La 2 NiO 4+ delta containing excess oxygen, i.e. delta >O. They are 2a*ka*1c (k, 1=n or 2n depending upon n) and square root 2a*p square root 2a*qc (most frequently p=2 and q=1), where a*a*c stands for the K 2 NiF 4 -type cell. The origin of these s…
Preparation and Properties of Mg-PSZ by Different Processing Routes
The aim of the present work is to study the densification behaviour and microstructural evolution in zirconia alloyed with 3.4 wt % MgO. A comparison is made of products obtained by conventional mechanical mixing and the wet-chemical method of coprecipitating the constituents as crystallized materials obtained under h…
DIAMOND SYNTHESIS BY DC PLASMA JET CVD
This paper reviews our research on diamond synthesis by etc plasma jet CVD. The unique feature of this method is supplying high radical density plasma to a substrate by quenching a thermal plasma. The maximum growth rate is 200 μm/h. The crystallinity measures well in terms of x-ray diffraction and Raman spectroscopy.…
Graphite for the nuclear industry
Graphite finds applications in both fission and fusion reactors. Fission reactors harness the energy liberated when heavy elements, such as uranium or plutonium, fragment or fission''. Reactors of this type have existed for nearly 50 years. The first nuclear fission reactor, Chicago Pile No. 1, was constructed of grap…
New Fluorination Reactions of Ammonium Bifluoride
This paper describes a novel route for the production of low-oxygen-containing fluorozirconate glasses. The process involves the use of a hitherto unknown solid-state chemical reaction between ammonium bifluoride and specific anhydrous and hydrated metal fluoride salts. The products are defined as ammonium fluoride–me…
Improvements in the structure and adhesion of electrodeposited thin film cadmium selenide
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTImprovements in the structure and adhesion of electrodeposited thin film cadmium selenideHenry Wynands and Michael CociveraCite this: Chem. Mater. 1991, 3, 1, 143–149Publication Date (Print):January 1, 1991Publication History Published online1 May 2002Published inissue 1 Jan…
An extension of the theory of the deformation of fiber assemblies.
A new approach is presented to the micromechanics or fiber assemblies, extending the current idea of the local fiber orientation distribution. The theory can predict all the differential elastic moduli of a mass in terms of its structural parameters, the density of fiber length, orientation density, fiber crimp parame…
The Growth of KDP Crystals and its Mechanism by Splicing Misoriented in Aqueous Solution
Abstract The growing characteristics of splicing misoriented KDP seeds of both bulk and thin pieces were investigated. The chemical etching method was used to determine the prismatic and Z‐plate surfaces of the crystals grown by splicing bulk KDP seeds. The X‐ray Lang topography method was employed to measure original…
Production of Al–Cu and Al–Si Alloy Rods by a Moldless Upward Continuous Casting Process
Al–Cu and Al–Si alloy round rods were experimentally produced by using a moldless upward continuous casting apparatus. Al–Cu and Al–Si alloys were selected because they have a wide solidification range and solidify in a mushy type or in a eutectic manner. Effects of the the alloying element, the superheat of molten me…
The effect of size of polystyrene particles on their retention within the rat peritoneal compartment, and on their interaction with rat peritoneal macrophages
Polystyrene particles (size range 300nm-3μm diameter) were radioiodinated and their capture by rat peritoneal macrophages measured in vitro. For unmodified particles, most efficient accumulation was observed using a diameter of 600nm (Endocytic Index (E.I.) = 16.4 ± 2.9μl/106cells/h). Particles (3μm diameter) which ha…
Metabolism of the Flame Retardant Plasticizer Tris(2-chloroethyl)phosphate by HUman and Rat Liver Preparations
Metabolism of the Flame Retardant Plasticizer Tris(2-chloroethyl)phosphate by Human and Rat Liver Preparations. CHAPMAN, D. E., MICHENER, S. R., AND POWIS, G. (1991) Fundam. Appl Toxrcol. 17, 2 15–224. Previous studies indicate that tris(2-chloroethyl)phosphate (TCP) preferentially produces hippocampal brain lesions i…
Effect of Final Thickness on Secondary Recrystallization of Grain-Oriented Electrical Steel Produced by Single-Stage Cold Rolling Process
A study has been made on the effect of the final thickness, 0.60-0.18 mm, under the same reduction rate in cold rolling on the secondary recrystallization of the grain-oriented electrical steel produced by the single-stage cold rolling process.(1) On the heating period of final annealing in the case of the atmosphere…
Crystal growth and structure refinement of SeCeO3 protonic conductor.
アークイメージ浮遊帯法により陽イオン伝導体であるSrCeO3およびSrCe0.95Yb0.05O3-a結晶を育成し,それぞれの構造を粉末X線回折図形のRietveld解析により決定した。精密化には,Glazerが提案したひずんだペロブスカイト型構造モデルを使用して行った。SrCeO3は斜方晶のPnma(No.62)で,格子定数はa=6.1473(2),b=8.5803(5),c=6.0066(2)Åで,SrCe0.95Yb0.05O3-aではa=6.1409(2),b=8.5783(7),c=5.9997(4)Åであった。SrCeO3とSrCe0.95Yb0.05O3-aとの精密化された構造パラメーターは,誤差範囲内で一致し,イッ…
High Temperature Corrosion of Iron Chromium Alloys by Tellurium.
The reaction rates between iron-chromium alloys (1.17, 5.65 and 11.96 a/0Cr) and tellurium were measured in the temperature range of 873–1,023 K at 350 Pa of tellurium vapor pressure, and in the tellurium vapor pressure range of 66.7–600 Pa at 923 K. The electron probe microanalysis, marker experiment and X-ray diffra…
Structure and Hydrolysis of Heterovalent polynuclear Oxonitrocomplexes of Ptii,iv in Aqueous Solutions by 195Pt and 15N nmr Spectroscopy
195Pt and 15N NMR chemical shifts and constants of scalar spin–spin coupling, 195Pt–15N and 195PtII–195PtIV, for the heterovalent platinum tetra- and hepta-meric oxonitrocomplexes [(NO2)6PtIV(μ-O)3PtII3(NO2)6]5− and [(NO2)6PtII3(μ-O)3PtIV(μ-O)3PtII3(NO2)6]8−, and for products of hydrolysis of these complexes have been…
Notes. Synthesis and nuclear magnetic resonance spectroscopy of the platinum–gold clusters [Pt(AuPPh 3 ){P(CH 2 CH 2 PPh 2 ) 3 }] + and [Pt(AuPPh 3 ){N(CH 2 CH 2 PPh 2 ) 3 }] +
The platinum–gold cluster complexes [Pt(AuPPh3){P(CH2CH2PPh2)3}]+ and [Pt(AuPPh3){N(CH2CH2PPh2)3}]+ were obtained by treatment of [PtH{P(CH2CH2PPh2)3}]+ or [PtH{N(CH2CH2PPh2)3}]+ with [AuCl(PPh3)], isolated as BPh4– salts, and characterized by 31P and 195Pt NMR spectroscopy. They contain five-co-ordinate platinum and…
Cryopump vibration isolation system for an SEM
Abstract A standard commercially available cryopump system has been installed on a scanning electron microscope (SEM) using specially optimized vacuum vibration isolation bellows. This installation was successful in reducing the cryopump‐induced vibration to a level that did not degrade the standard performance or res…
Effects of microstructure on fracture toughness of SUS 329 J1 duplex stainless steel welds
Relationship between the microstructure and the fracture behavior of welds which were tested by Charpy impact on SUS329J1 (Fe-25Cr-5Ni-0.1N) stainless steel has been studied.Volume fraction of γ phase decreases at HAZ which has been heated over 1400K. At the region over 1600K, the morphology of γ also change to Widman…