precursor and as prepared powder was studied by simultaneous differentialthermalanalysis (DTA) and thermogravimetric (TG) analysis on a STAR SW9.0. The TG–DTA analysis for all the samples was done from RT to 900 °C in dry air. The heating rate was
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
differentialthermalanalysis 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. Differentialthermalanalysis data were
the differentialthermalanalysis (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
Thermal analysis (TA), e.g., thermogravimetry (TG), differentialthermalanalysis (DTA), and differential scanning calorimetry (DSC) have been used widely for scientific and practical purposes [ 1 , 2 ]. These
Authors:Zuzana Jakubíková, Marek Liška, Alfonz Plško, and Jana Pagáčová
—Chemical oxygen demand test [ 7 ]. The obtained value was COD = 19.1 mg/g.
Differentialthermalanalysis (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
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 differentialthermalanalysis (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
systematically studied. The grown crystals were characterized by differentialthermalanalysis (DTA)/thermogravimetric (TG) analysis, dielectric measurement, DC conductivity measurement, and surface etching study.
Authors:P. Budrugeac, Andrei Cucos, and Lucreţia Miu
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), differentialthermalanalysis (DTA
of reduced glutathione (GSH) of general composition [Pb(L)(X)]H2O
(where L=GSH; X=Cl,
NO3, CH3COO, NCS) have been
synthesized and characterized by elemental analyses, infrared spectra and
electronic spectra. Thermogravimetric (TG) and differential thermal analytical
(DTA) studies have been carried out for these complexes. Infrared spectra
indicate deprotonation and coordination of cysteinyl sulphur with metal ion.
It indicates the presence of water molecule in the complexes that has been
supported by TG/DTA. The thermal behaviour of complexes shows that water molecule
is removed in first step-followed removal of anions and then decomposition
of the ligand molecule in the subsequent steps. Thermal decomposition of all
the complexes proceeds via first order kinetics. The thermodynamic activation
parameters, such as E*, A,
and ΔG* have been calculated. The
geometry of the metal complexes has been studied with the help of molecular
modeling for energy minimization calculation.
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.