Search Results
Application of thermal analysis in nanotechnology
Carbonization and purification of nc-TiC x in argon atmosphere
Abstract
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.
. [3] Bellos E. , Tzivanidis C. , Korres D. , Antonopoulos K. A. ( 2015 ), Thermal analysis of a flat plate collector with Solidworks and determination of convection
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 thermal analysis (DSC) in the range of temperatures from (−25) to 530 °C, with the temperature
constructed at the Institute of Physical Chemistry of Polish Academy of Science. The results were calculated using computer software [ 13 ]. Thermal analysis and infrared absorption measurements were carried out for the cement pastes after 2nd and 28th day of
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 thermal analysis 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 thermal analysis is the temperature at which
. 2009 ; 96 : 481 – 485 . 10.1007/s10973-008-9169-x . 6. Bakon , KH , Palmer , SJ , Frost , RL . Thermal analysis of synthetic reevesite and cobalt substituted reevesite (Ni, Co)6Fe 2
bound water as a percentage of total bound water in the cake crumb was determined by differential thermal analysis (DTA) and thermogravimetry analysis (TGA) ( Madhava et al., 2001 ). DTA included differential thermogravimetry (DTG) and DTA curves, while
bound water as a percentage of total bound water in the cake crumb was determined by differential thermal analysis (DTA) and thermogravimetry analysis (TGA) ( Madhava et al., 2001 ). DTA included differential thermogravimetry (DTG) and DTA curves, while
Cadmium(II) and calcium(II) complexes with N,O-bidentate ligands derived from pyrazinecarboxylic acid
Thermal data and crystal structure correlation
) – – – vb very broad Thermal analysis and structure correlation Plausible tentative thermal degradation patterns proposed for the metal complexes under air are presented in Fig. 3
