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Abstract

The effects of Mg and Ca on sulfide modification of sulphur steel were studied to elucidate the difference between micromagnesium treatment and micro-calcium treatment for the inclusion of sulphur steel. The results show that the inclusions in the steel appeared with an oxide core of Al2O3 and MnS wrapped. After the addition of Mg, the core was changed to spinel, and the MnS coating was changed to Mn-Mg-S. After Ca was added, the core was changed to Ca-Al-O, and the MnS coating was changed to Mn-Ca-S. The Mg content was higher than Ca content in the sulfides of the steel. Therefore, Mg was more effective than Ca in terms of sulfide modification with the same content of Mg and Ca in steel, but the yielding rate of Mg was lower than that of Ca. The Mg content in the oxide core was higher than Mg of the coating of the inclusions in the steel treated with Mg or Mg-Ca. In contrast, the Ca content in the oxide core was lower than Ca of the coating of the inclusions in the steel treated with Ca or Mg-Ca. MnS formed and precipitated during the melt solidification process. The complex sulfide (Mg-Mn-S) was precipitated around MgO·Al2O3 in the Mg treated steel during the cooling process. CaS inclusion was precipitated on the CaO·Al2O3 inclusions in the liquid Ca-treated steel. Thus, CaS was formed first, whereas MnS was formed during the cooling process, followed by the formation of complex sulfide (CaS+MnS), which finally precipitated around CaO·Al2O3 in the Ca-treated steel.
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Abstract

In this paper, explain the preparation of CaTiO3 ceramics synthesized by the solid-state reaction method. Calcium carbonate and titanium dioxide were high energy mixed in stoichiometric amounts, and the obtained mixture was calcined at different temperatures (800, 900, 1000 and 1300ºC) for 2 h. The obtained samples were characterized by measurement of particle size, Energy Dispersive X-Ray (EDX) Analysis; differential thermal analysis, X-ray diffraction and SEM images. XRD patterns indicated that CaTiO3 ceramics with the structure of perovskite is obtained from calcined powders at 1,300°C for 2 h. SEM images show the formation of a very fine and homogeneous morphology. The measured values of electrical resistivity were within the typical range of insulating materials and approach values corresponding to insulating ceramics.
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Abstract

The discovery of (BaxCa1-x)(ZryTi1-x)O3 lead-free ceramics drawn a lot of attention to those novel materials because of their excellent piezoelectric properties. However, quite a little attention has been paid to other features of the material. This article reports a wide range of research, including composition, structure and microstructure, dielectric response and impedance spectroscopy in order to systematize and expand knowledge about this peculiar ceramics and strontium doping effect on its properties. In order to test that influence a series of samples with various strontium concentration, precisely the admixtures of 0.02, 0.04 and 0.06 mol% were prepared, as well as basic ceramics to compare obtained results.
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Abstract

The history of “Études de théologie, de philosophie et d’histoire” is connected with the Work of Saints Cyril and Methodius (L’OEuvre des Saints Cyrille et Méthode), which was founded in 1855. The purpose of the Work was prayer as well as refl ection and discussion on the union of the Catholic and Orthodox Church. The founder of the Work, Ivan Gagarin, once Russian Orthodox and from 1842 a Catholic in France, gathered for this purpose a vast library in order to document the history of ecumenism and the ecclesiastical history of the Slavic countries. With time, the Slavonic Library became one of the most abundant book collections on these subjects in Western Europe. Gagarin believed that the West knew too little about the Orthodox Russia, which was an impediment to the union of the Churches. To bring his motherland closer to Western Catholics and to present problems to be faced by those who strove for the unity of the Christian East and West, Gagarin decided to start to publish a magazine “Études de théologie, de philosophie et d’histoire”, for which he needed approval of the superiors of the Jesuit Order. Due to Gagarin’s prolonged negotiations with his superiors, the magazine did not start to be published until 1857. This paper deals with the history of “Études de théologie, de philosophie et d’histoire”.
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Abstract

The names of wives in Belarusian Narew dialects were most often formed from the husband’s name using the formatives -iχa, -ča and -ka. These forms were neutral in the past, and the formatives in questions were a maritonymic indicator. During the post-war period, particularly in the nineteen-seventies, a tendency for the gradual disappearance of wives’ names with the formatives -iχa, -ča and -ka was observed. The names of this type now refer almost exclusively to old women. They are used by persons of the oldest generation. In this usage, the names in question retain their maritonymic function and a neutral tinge. The names of wives with the formatives -iχa, -ča and -ka, used to refer to old women by young or middle-aged people, usually have an augmentative-pejorative or jocular- ironic connotation. The names of this type are gradually becoming functionally close to nicknames. What is conducive to the process is without doubt the archaic form of the names in question. The archaization of the traditional names of wives with the formatives -iχa, -ča and -ka is accompanied by the distinct activation, infl uenced by the Polish language, of maritonymic f Keywords: Białystok region, Narewka village and its vicinity, peripheral Belarusian dialects, mari-tonymic forms with the formative -iχa, -ča and -ka, disappearance and change of function Narewka village and its ormatives -ova, -ava, and partly -ina, -yna.
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