Materials Literature
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The temperature dependence of the rotational displacement parameters below the second-order phase transitions in SrTi${\mathrm{O}}_{3}$ and LaAl${\mathrm{O}}_{3}$ at ${T}_{a}=105.5 \mathrm{and} 797$\ifmmode^\circ\else\textdegree\fi{}K is described by an exponent $\ensuremath{\beta}=0.33\ifmmode\pm\else\textpm\fi{}0.02…
The term fettling which constitutes the major part of finishing may be considered to include:
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。
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.…
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…
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…
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…
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…
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‐…
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…
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…
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…
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…
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…
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…
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.
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 (…
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…
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…
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.