Authors:A. Biedunkiewicz, U. Gabriel, P. Figiel, and D. Grzesiak
The analysis of purification and carbonization process in argon with use of nc-TiCx/C powder, obtained by sol–gel method, is presented. TG-DSC measurements were carried out under non-isothermal and isothermal
conditions. The samples were heated up in series to 1473, 1573, 1673, and 1773 K. For this series description of process kinetics
is presented. Four stages of the process have been distinguished. Kinetics was described using Coats-Redfern equation. The
kinetic parameters were determined for particular stages. Using obtained kinetic data, the analysis of the process was performed.
The α(T) and r(α,T) dependencies on heating rate and temperature were investigated. In order to obtain high carbonization degree and carbide
particles of small size, an appropriate temperature and time of process duration have to be determined. Appropriate carbonization
and particles size were obtained for series heated up to 1570 K. It has been demonstrated that the oxygen, present at trace
level in argon, can react with components of the system in certain range of temperature, influencing the quality of obtained
product. The particles have been depicted by TEM method, whereas characterization of structure and particles size was performed
by XRD method. MS method was used to determine evolved gaseous products.
Authors:Grzegorz Makomaski, Wiesława Ciesińska, and Janusz Zieliński
for 1 h.
Prepared carbonizates were activated with steam at 800 °C to 50 % burn-off. For the samples after the activation process the measurements of thermalanalysis (DSC) in the range of temperatures from (−25) to 530 °C, with the temperature
Authors:Barbara Pacewska, Iwona Wilińska, and Mariola Nowacka
constructed at the Institute of Physical Chemistry of Polish Academy of Science. The results were calculated using computer software [ 13 ]. Thermalanalysis and infrared absorption measurements were carried out for the cement pastes after 2nd and 28th day of
Authors:R. Kusiorowski, T. Zaremba, J. Piotrowski, and J. Adamek
requiers higher temperature. The final products of amosite decomposition above 900 °C (at isothermal soaking) are a spinel, hematite, magnetite, and cristobalite [ 31 , 38 ]. The thermalanalysis of tremolite mainly shows an endothermic peak at ∼950 °C due
best tool which allows to determine the thermal decomposition of organic substances in ceramic samples and the proper heating program seems to be DTA/TG measurements [ 20 ]. The important information from thermalanalysis is the temperature at which
Authors:Maria Marudova, Stanko Stankov, and Marianna Baeva
bound water as a percentage of total bound water in the cake crumb was determined by differential thermalanalysis (DTA) and thermogravimetry analysis (TGA) ( Madhava et al., 2001 ). DTA included differential thermogravimetry (DTG) and DTA curves, while
Authors:B. Pacewska, M. Nowacka, I. Wilińska, W. Kubissa, and V. Antonovich
this study was to investigate the effect of spent FCC catalyst on hydration of two types of CACs (of about 40 and 70% content of alumina) at ambient temperature. Thermalanalysis (TG, DTG), infrared absorption (FTIR) and X-ray diffraction methods were