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Abstract  

The mixed zirconium, titanium, hafnium and first-row transition metal oxides (containing phosphorous oxide) were prepared using ion exchange method followed by calcinations at 1020 K during 12 h. The resulted mixed oxides were identified by XRPD method and studied their thermal behaviour by TG-DTA analysis. As a result of thermal analysis there were found one exothermic (with a peak at about 950 K), and one endothermic (with a peak at about 1300 K) processes, both without mass loss. The observation was valid for all investigated samples. The analysis of XRPD patterns of the investigated samples showed well-defined crystal phases characteristic of each oxide. The XRPD analysis also verified the phase transition of tetravalent metal oxides from orthorhombic to tetragonal, observed by DTA analysis.

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Abstract  

The phase equilibria data are presented for two binary systems (LiCl-KCl and K2O-Nb2O5) which are received by thermal and oscillation method of phase analysis.

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Molnár, M., Sütö, T., Tóth, T. és mtsa: Prolonged blockade of nitric oxide synthesis in gravid rats produces sustained hypertension, proteinuria, thrombocytopenia, and intrauterine growth retardation. Am. J. Obstet. Gynecol., 1994, 170 , 1458

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Invar® oxidation in CO2

Kinetics and mechanism of formation of a wüstite layer

Journal of Thermal Analysis and Calorimetry
Authors: S. Menecier, S. Valette, P. Denoirjean, and P. Lefort

Introduction In the field of thermal plasma deposition, it has been recently shown [ 1 ] that the pre-oxidation of steel substrates enhanced the adhesion of ceramic coatings, compared with the classical method, where the

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Orvosi Hetilap
Authors: András Szarka, Gábor Bánhegyi, and Balázs Sümegi

–147. Muller, F. L., Lustgarten, M. S., Jang, Y., et al.: Trends in oxidative aging theories. Free Radic. Biol. Med., 2007, 43 (4), 477– 503. Anson, R. M., Hudson, E., Bohr, V. A.: Mitochondrial endogenous oxidative

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Reaction Kinetics, Mechanisms and Catalysis
Authors: K. V. Novikova, M. O. Kompanets, O. V. Kushch, S. P. Kobzev, M. M. Khliestov, and I. O. Opeida

Introduction The selective oxidation of alkylbenzenes with a green oxidant (molecular dioxygen) to oxygen-containing compounds such as alcohols, ketones and carboxylic acids is a very important industrial process. Traditional

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Introduction Thermal analysis techniques used in crude oil characterisation was directed towards correlation between thermal behaviour of the samples and kinetic studies. Bae [ 1 ] investigated the thermo-oxidative behaviour

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Introduction Reactive elements, especially rare earths (RE) have been used to improve high-temperature oxidation resistance of chromium dioxide and alumina forming alloys. The improvements are in the form of reduced oxidation

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materials are likely to contain additives such as wood preservatives, coatings, and fire-retardants. Wood preservatives contain metal oxides that can generally act as a catalyst [ 1 – 4 ]. Copper(II) oxide (CuO) is a major component of wood preservatives and

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Journal of Thermal Analysis and Calorimetry
Authors: V. Sydorchuk, S. Khalameida, J. Skubiszewska-Zięba, and R. Leboda

. Therefore, these compounds are perspective as oxidation catalysts [ 3 – 5 ], electro- and photochromic species [ 6 , 7 ], photocatalysts [ 2 , 3 , 8 , 9 ]. In other words, HPCs are versatile materials and have potential for numerous technological

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