Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The single-electron capture and loss cross sections ${\ensuremath{\sigma}}_{0,\ensuremath{-}1}$ and ${\ensuremath{\sigma}}_{01}$ for 2-50-keV hydrogen atoms incident upon hydrogen molecules and inert-gas atoms have been measured directly by observing the growth of the fast-collision products (i.e., the fast primary $\…
The significance of present knowledge of the structure of the protein collagen to the study of isinglass and the finings derived from it is examined. It is suggested that differences in fining efficiency of solutions prepared by identical processes from different sources of isinglass are due to variations in the size…
As a method to desilicify from black liquor containing silica in rich amount, carbon dioxide process was investigated. Particularly, the relation between the final pH of the black liquor and the removal percentage of silica by the carbon dioxide treatment was clarified. Further, based on the obtained knowledge of the…
The phenomenological effects of calcination as expressed by such properties as shrinkage, specific gravity, bulk density and porosity were investigated on magnesites from different sources in India, over temperatures ranging from 600°C to 2000°C. No single property is adequate to assess properly the quality of a magne…
B. M. Gatehouse and P. Leverett, Chem. Commun. (London), 1967, 374 DOI: 10.1039/C19670000374
The changes of hardness, Cahrpy impact value, lattice parameter of ferrite, internal stress in matrix, carbide reaction, elements in carbide, and electron microstructure occuring during isothermal tempering of hot-work tool steels of 3Cr-5W-0.3V(DSS), 3Cr-9W-0.3V/(DSH), 3Cr-5W-0.3V-3Co(CoSS), 3Cr-9W-0.3V -3Co(CoSH), 1…
The chemistry of non-peroxo polynuclear cobalt(III) ammines is reviewed with particular emphasis on Werner's major contributions. Modern work in this area has shown that Werner's conclusions regarding the structures of these compounds are substantially correct in spite of the relatively primitive techniques he had ava…
Abstract Results are presented of the structures obtained upon crystallization of polypropylene from dilute solutions in α ‐chloronaphthalene. It is shown that under proper conditions of concentration and crystallization, isotactic polypropylene can be caused to grow in the form of lath‐shaped single‐crystal lamellae.…
Abstract Es gelang, unter den Bedingungen des Abkühlungsverfahrens aus Schmelzlösungen von MgO in Natrium‐ bzw. in Bleimetaborat, Kristalle von Kotoit, Mg 3 [BO 3 ] 2 , zu erhalten. Die optimalen Versuchsbedingungen werden angegeben. Aus Schmelzlösungen von MgO in Calciummetaborat kristallisiert eine nicht identifizie…
酢酸マグネシウム4水和物の分解反応の示差熱分析図形は,試料充てん層の厚さにより著しい変動を示す。この事実から,示差熱分析を中心として,熱天秤,X線回折,化学分析などの方法により,空気中における酢酸マグネシウム4水和物の熱分解の過程を追跡した。4分子の結晶水の脱水は約60℃ から開始するが,脱水の過程に中間水和物の生成はなく,一段脱水である。160℃以下の温度で脱水した無水物は,X線的に無定形状態であるが,180～220℃の温度範囲で結晶化が起こり,α型無水物となる。無水物は180～280℃ の温度範囲で数%分解するが,大部分は280℃ まで熱的に安定である。無水物は約300℃ で酸化マグネシウムに分解するが,熱分解の過程に中間化合…
The weight volume of wood, WRV of pulp and certain physical properties of paper of some tropical and Japanese hardwoods were studied from the morphological point of view.Correlation between the ratio of lumen diameter and fiber diameter (l/D) was found to have close relationship to such properties as the weight volume…
Sendust Fe-Si-Al ternary alloys have high saturation flux density, low coercive force and high resistivity. Moreover, they are strong against wear, so efforts have been devoted to make use of these alloys as the video-tape-recorder head materials. These alloys are too hard and brittle to be made into thin sheets by ro…
The engineering thermodynamic cycles and thermal efficiencies of bimetallic and metallic hydride emf cell systems, which are thermally regenerated by separating the reactants by distillation, are discussed. Thermodynamic equations are presented for the ideal regeneration cycles and from the ideal cycles, thermal effic…
Recently it was shown that the C[dbnd]S group in fluorothiocarbonyl compounds readily undergoes addition polymerization. This review describes polymers obtainable from such compounds as CF2[dbnd]S, CF3CF[dbnd]S, ClCF2CF[dbnd]S, HCFClCF[dbnd]S, and hexafluorothioacetone. The polymerization of CF2[dbnd]S is readily brou…
In the paper a review is given of the properties of oil-impregnated lapped-plastic-tape dielectrics for use as insulation in extra-high-voltage underground cables. The following subjects are discussed: choice of combinable materials, impregnation technique, results of breakdown measurements as a function of various di…
Abstract A quantitative characterization of natural rubber, both as the raw polymer, and unaccelerated vulcanized samples containing different proportions of sulfur and ranging from soft to hard rubber, is reported. A value of 86% of the chains of natural rubber could be accounted for against 37% as reported by Harrie…
Several years ago, members of ASTM Committee B-3, Subcommittee X (now Committee G-1, Subcommittee VI) on Stress Corrosion determined a need for review of work on stress corrosion testing prior to development of standards and criteria for determining stress corrosion susceptibility and behavior of various alloys. The s…
The thermal degradation of polytetrafluoroethylene oxide has been examined by the isothermal and thermogravimetric methods in the temperature range 450 to 650°C. The main components of the volatile gas are trifluoro-acetyl fluoride, carbonyl fluoride, and tetrafluoroethylene. The thermogravimetric decompositions of po…
The breakaway phenomena of Zr and some Zr alloys during high temperature oxidation were studied from a structural point of view, by means of high temperature X-ray diffraction, thermal gravimetry, optical microscopy, and differential thermal analysis. The structural change in oxide scale at breakaway is in close relat…
Abstract Potentiometric titrations have been carried out on a sample of poly(acrylic acid) of very high molecular weight ( M w = 1.92 × 10 6 ). At polymer concentrations greater than about 1 × 10 −4 equiv./liter, this material behaves as a weaker acid, under given conditions, than when it is heat degraded, and also co…