Fettling
The term fettling which constitutes the major part of finishing may be considered to include:
Materials Literature
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Growth Rates of Sodium Thiosulfate Single Crystals from Solution
Na2S203・5H2O単結晶の成長速度を, 溶液流速および温度を変えて測定した。25.0℃における (100) 面の成長速度に対する溶液流速の影響は_で表わすことができた。mの値は溶液流速とともにわずかに変化するが, ほぼ1.3となる。また温度の影響は,r=7.70×1015 (△c) 1.30exp (-20400/RT),286°K≦T≦298°Kで表わすことができた。
Plastic Deformation of Zinc Single Crystals under Hydrostatic Pressure
Hereunder is presented a brief report of the tensile tests performed under hydrostatic pressure up to 2000kg/cm2 on specimens of zinc single crystals with various orientation. The load-elongation curves and the features of plastic deformation to fracture varied significantly in accordance with the crystal orientation.…
Isosteric heats of adsorption for nitrogen adsorbed on microporous silica
Nitrogen adsorption isotherms at three different but similar temperatures were determined on samples of microporous silicas prepared by a freeze–thaw technique. A maximum in the plot of the isosteric heat of adsorption against coverage was observed on all the samples investigated. It is suggested that the effect can b…
Effects of temperature on formation and corrosion resistance of boehmite films
Studies were made on the effects of temperature on the formation and corrosion resistance of boehmite films on aluminum by treatments in aqueous sulution and water vapor. The experiments were conducted by measurements of the film thickness, electron microscopy, electron diffractiometry, X-ray diffractiometry, and corr…
Dielectric relaxation in three chlorine substituted anilines
The complex dielectric permittivity of ortho-, meta-, and para-chloroaniline has been measured at various temperatures at the wavelengths of 10, 3, 2, and 1 cm. For the first two compounds the measurements have been made in pure liquid from as well as in solutions in carbon tetrachloride at various concentrations. p-C…
Photofading Reaction of Some Disperse Azodyes
分散アゾ染料の光退色の反応機構に関連して, オキシアゾベンゼンとフェニルアゾピラゾロン誘導体の光退色挙動をナイロンとポリエステルフィルム上において検討した。そしてこれらアゾ染料の光退色速度におよぼす置換基の効果を調べた。オキシアゾベンゼン誘導体ではこれら光退色の容易さは水酸基の置換位置と数に依存し, その退色速度は 2,4-ジオキシアゾ>>2-オキシアゾ>4-オキシアゾの順位となる。また, フェニルアゾピラゾロン系染料においてポリエステル上の光退色相対速度定数の対数値と第1成分のフェニル核内の置換基の Hammett 定数との間には負の勾配をもつ良好な直線関係がえられる。そしてエトロ基を有する染料では両系列ともナイロン上においてみ…
Zur Kristallographie von Doppelsalzen aus Calciumsulfat und Natriumsulfat
Abstract In the course of investigating a special slurry problem in the Na 2 SO 4 production metastable double salts of calcium sulphate and sodium sulphate were detected (Emons, Stegmann). In this paper it is reported on the properties of these compounds and their decomposition products, determined by microscopic, X‐…
Effects of Alloying Elements on the Corrosion Resistance of Low Alloy Steel in the Sea-Water Splash Zone
L aboralory corrosion lesls and marille eX/Josure lesls were carried oul in order 10 sludy Ihe eJJecls oj alloying elemenls on Ihe corrosion resislance oj low alloy sleel in Ihe s/Jlash zone. nJjecls oj alloying elemenls on Ihe corl'Osioll resislallce were Jound 10 depend U /JOIl Ihe cycle oj drying and welling . [ /I…
Role of Aluminum Ion in the Structure of Alkaline Earth Aluminoborate Glasses
The composition dependence of some physical properties of Cabal and Babal glasses is discussed for the purpose of elucidating the role of aluminum ion in the structure of alkaline earth aluminoborate glasses. To interpret the experimental results on the basis of the glass structure, three rules are assumed about inter…
Thermal Expansion of Uranium and Tantalum Monocarbides up to 2700°C
Data are reported from experiments performed to measure thermal expansion of uranium carbide up to the meltin, point, the expansion accompanying the transition from solid to liquid, and thermal expansion in the liquid phase. The thermal expansion of the tantalum carbide crucibles, used to hold the uranium carbide spec…
Thermodynamic Analysis of the Open-Tube Chemical Vapor Transport of ZnO Using the Zn-H[sub 2]O Reaction
A thermodynamic analysis of the open‐tube chemical vapor transport of ZnO using the reaction of Zn and H 2 O has been attempted, assuming a simple reaction model for Zn and H 2 O vapor phase species. Based on this analysis, computer data have been derived to show variation in ZnO vapor phase content as a function of t…
A Study on Temperature and Strain Rate Dependences of Yield Stress at Low Temperatures in Pure Iron and Fe-Cr Alloys
Temperature and strain rate dependences of yield stress in purified pure iron and Fe-Cr alloys, were studied mainly by compression tests in the ranges of -196-300°C of temperature and 10-5-10-2sec-1 of strain rate.Relations between temperature (T), strain rate (ε) and frictional stress (σt), were established in the fo…
Hypoiodite reaction: the decomposition of oxalic acid half-esters
Alkyl half-esters of oxalic acid photolysed with mercury(II) oxide–iodine reagent gave mainly dialkyl oxalates. 1-Apocamphyl hydrogen oxalate gave, in addition to the diester, 1-apocamphyl iodide. 9-Triptycyl hydrogen oxalate gave 9-triptycyl iodoformate, which was thermally decomposed to 9-iodotriptycene and with sil…
Ring-disc electrodes. Part 12.—Application to ring current transients
The theory of ring current transients at a ring-disc electrode has been tested for Fe(CN)4–6/Fe(CN)3–6 and Br2/Br– systems at three different rotation speeds. Good agreement between theory and experiment has been found.
La fischesserite, Ag8Au Se2, premier séléniure d'or, isotype de la petzite
Fischesserite, Ag₃AuSe₂ was found in carbonate veins at Predborice, Bohemia, Czechoslovakia, associated with naumannite, clausthalite, berzelianite, gold and other selenides. Isometric, isostructural with petzite ; space group O⁸-I4₁3₂ ; a₀ = 9.967 ± 0.003 Å ; Z = 8 ; dₓ = 9.05. The strongest X-ray lines are : 2.662 (…
Mechanisms and Control of Gas Bubble Formation in Cosmetics
Synopsis--The presetace of GAS BUBBLES iu cosmetic and pharmaceutical preparations is generally undesirable not only from the appearance vicwpoint, but also from physical, chem-ical, and biological stability considerations. The air bubbles in a product can affect emul-sion stability, promote oxidation, and, in some in…
Partial and Total Vapor Pressures over Molten Bi[sub 2]Te[sub 3]
The total vapor pressure, , over has been determined between 980° and 1169°K by using a sum manometric technique. The lower end of an evacuated, inverted, fused silica U‐tube was immersed in a large reservoir of melt inside a transparent furnace. The value of and the density of were obtained at each temperature by vis…
Structure de La6Cu2Si2S14
Collin Gaston, Laruelle Pierre. Structure de La6Cu2Si2S14. In: Bulletin de la Société française de Minéralogie et de Cristallographie, volume 94, 2, 1971. pp. 175-176.
Elastic constants of triclinic copper sulphate pentahydrate crystals
Using an iterative technique to obtain the exact solutions of the cubic Christoffel equation, the 21 elastic constants of copper sulphate pentahydrate have been determined at 25°C by the ultrasonic pulse echo method. The elastic constants, referred to the IRE recommended system of axes, are c 11 =5·65, c 12 =2·65, c 1…