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refractoriness and refractoriness under load are high, as expected. Differential thermal analysis Well-designed concrete attains strength only after hydration of cement [ 6 ]. Due to a poor crystallinity of the hydration

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Journal of Thermal Analysis and Calorimetry
Authors: J. J. H. Lancastre, F. M. A. Margaça, L. M. Ferreira, A. N. Falcão, I. M. Miranda Salvado, M. S. M. S. Nabiça, M. H. V. Fernandes, and L. Almásy

differential thermal analysis techniques at Aveiro University. The thermogravimetric data were collected using a Setaram equipment, model SETSYS, in the 25–600 °C range, at a heating rate of 10 °C min −1 , in air. Differential thermal analysis data were

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the differential thermal analysis (DTA) or differential scanning calorimetry (DSC). Among the chalcogenide systems, selenium and selenium based glassy alloys have been intensively studied due to their wide technical applications, especially in

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Journal of Thermal Analysis and Calorimetry
Authors: Nopsiri Chaiyo, Rangson Muanghlua, Surasak Niemcharoen, Banjong Boonchom, Panpailin Seeharaj, and Naratip Vittayakorn

Introduction Thermal analysis (TA), e.g., thermogravimetry (TG), differential thermal analysis (DTA), and differential scanning calorimetry (DSC) have been used widely for scientific and practical purposes [ 1 , 2 ]. These

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—Chemical oxygen demand test [ 7 ]. The obtained value was COD = 19.1 mg/g. Differential thermal analysis (DTA) measurements were performed on DERIVATOGRAPH MOM Budapest equipped with the PC A-D data collection, using the heating rate of 10 °C/min. and the

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Journal of Thermal Analysis and Calorimetry
Authors: Masoud Nazarian-Samani, Ali Reza Kamali, Mahboobeh Nazarian-Samani, Roohallah Mobarra, and Saber Naserifar

Ar flow. About 80–100 mg of the 10 h-milled powder was subjected to differential thermal analysis (DTA) at different selected heating rates (5, 10, 15, 20, and 50 °C min −1 ). The temperature covered in the DTA ranged from room temperature to 1200 °C

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systematically studied. The grown crystals were characterized by differential thermal analysis (DTA)/thermogravimetric (TG) analysis, dielectric measurement, DC conductivity measurement, and surface etching study. Experimental

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patrimonial objects made from leathers as well as the methods to put in evidence the impact of environmental factors on them. Among these techniques, the thermal analysis methods, especially thermogravimetry (TG), differential thermal analysis (DTA

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Abstract  

Ionic chelate complexes of kojic acid(I) and hafnium(IV) of the type [(η5-C5H5)2HfL]+[MCl3] (II)[HL=kojic acid; M=Zn(II), Cd(II), Hg(II), Cu(II)] have been synthesised and characterised by spectral studies (IR, UV, 1H NMR and 13CNMR). Thermogravimetric (TG) and differential thermal analytical (DTA) studies have been carried out for these complexes and from the TG curves, the order and apparent activation energy for the thermal decomposition reactions have been elucidated. The various thermal studies have been correlated with some structural aspects of the complexes concerned. From DTA curves, the heat of reaction has been calculated.

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Abstract  

The thermal decomposition of several sulfonamides and potassium salts of sulfonamides was investigated. The analyses were performed using a derivatograph in an air atmosphere, sample sizes were from 50 to 200 mg and heating rate from 2.5 to 20 K min-1. It has been established, that the thermal destruction of studied compounds occurs via three stages with formation of potassium carbonate as a final product of the complete combustion of potassium salts of sulfonamides. The temperature ranges, in which the analyzed compounds undergo thermal transformations were established. For evaluation of the results the principal component analysis (PCA) was applied. By this method the influence of the specific functional groups on the thermal decomposition of sulfonamides and potassium salts of sulfonamides was determined. It has also been recognized, that better discrimination among the analyzed compounds is obtained for the data set of the DTA.

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