The properties of hydraulic mortars were studied by means of simultaneous thermal analysis (STA), according to a procedure
proposed in the literature. Hydraulic limes, cement and/or slaked lime were mixed using different proportions of both inert
and reactive aggregates, in order to test the effectiveness of such procedure in distinguishing the different degree of hydraulicity
of such samples. The use of the normalized coordinates suggested in the literature results in overlapping of the clusters
of different kinds of mortars. Modified coordinates are proposed, which give promising results in view of outlining a ‘master
curve’ of hydraulicity.
A mass spectrometer coupling system for simultaneous TG/DSC/DTA-QMS measurements will be introduced that is capable of operation
at temperatures up to 2000°C. The coupling is maintained at a temperature very close to that of the sample, minimizing condensation,
and features an extremely short gas flow path. The efficiency of this coupling system will be demonstrated through examples
from the area of polymers, ceramics, metallurgy and recycling.
A thermal strengthening process, which occurs during low-temperature heating of binder-free silicon nitride, has been investigated
using simultaneous thermal analysis, dilatometry and FTIR and shown to occur in separate stages over clearly identifiable
temperatures. Reactions which give the strengthening are the loss of physically and chemically combined water and the decomposition
of ammonium carbonate and various hydrosilicates. Compacts have bend strengths of 8–10 MPa after strengthening at 500°C and
30–34 MPa after strengthening at 900°C.
High-temperature dilatometry shows several stages of sintering. The maximum rate occurs at 1800°C with shrinkage commencing
at 1450°C. Densities of 98.3% theoretical are obtained on heating to 1900°C.
Authors:L. Häuβler, G. Pompe, V. Albrecht, and D. Voigt
Ethylene vinyl acetate copolymers were investigated by means of simultaneous thermal analysis (STA) and pyrolysis gas chromatography (Py-GC). Both devices are coupled to a mass spectrometer (MS). STA-MS revealed that the calibration with poly(vinyl acetate) leads to sufficient accuracy in relation to the vinyl acetate (VA) content, because of the linear calibration plot.Quantitative determination of VA by means of Py-GC-MS was carried out at both 500 and 700°C. The calibration plot in this method was linear provided that the mass of VA did not exceed a critical value.
A recently-developed quadrupole mass spectrometer system specifically designed for thermal analysis studies, has been linked
to a thermobalance and a simultaneous TG-DTA unit, for evolved gas analysis. The performance and applicability of the system
is illustrated by examples from four fields of study
Authors:E. Yu. Semitut, P. E. Plyusnin, Yu. V. Shubin, S. A. Veniaminov, and S. V. Korenev
.3 ± 0.5/41.6.
Thermogravimetric experiments in hydrogen atmosphere were carried out on a Q-1000 derivatograph modified for operation in different atmospheres. Simultaneousthermalanalysis was made on an STA 409 PC Luxx ® device (NETZSCH
Authors:Denis A. Brosnan, John P. Sanders, and Stephanie A. Hart
Thermal analysis methods were used in characterization of masonry mortars and bricks. Simultaneousthermalanalysis and evolved gas analysis provided distinctive results for lime based mortar, mortars containing natural cement, and mortar
Authors:O. Ordzhonikidze, A. Pivkina, Yu. Frolov, N. Muravyev, and K. Monogarov
HMX and CL-20 is of key importance to meet the advanced performance objectives of solid propellants.
One of methods for investigation of thermal decomposition of energy-intensive substances is a simultaneousthermalanalysis (STA), those
Authors:R. Kunze, D. Neubert, K. Brademann-Jock, and U. Erhardt
A simultaneous thermal analysis/mass spectroscopy system was used for the determination of halogenated hydrocarbons in polymeric
foam insulation materials. The investigation of ten different polymeric foams show that this equipment is a sensitive and
reliable tool for the identification and determination of the bubbling agent. The results are compared with the Purge and