Results 301 to 310 of about 40,582 (335)

Temperature Measurement in Thermogravimetry

Review of Scientific Instruments, 1964
A method is described whereby the temperature of a sample in a thermobalance may be determined directly without the large uncertainty that usually accompanies these measurements. The procedure consists of using a unijunction transistor relaxation oscillator with a thermistor as the resistive part.
Emanuel P. Manche, Benjamin Carroll
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High resolution thermogravimetry

Journal of Thermal Analysis, 1992
A new thermogravimetric instrument is introduced, Hi-ResTM TGA 2950. The Hi-ResTM TQA gives a significant improvement to TG results. The instrument control parameters are varied as a function of the sample's rate of weight change. This novel feature improves resolution and reduces analysis time.
S. R. Sauerbrunn, P. S. Gill, B. S. Crowe   +2 more
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Thermogravimetry of Selected Bentonites

Energy Sources, 2002
In this research the application of thermal analysis techniques (TG-DTA) to the characterization of bentonite samples is presented. The thermal behavior of 4 bentonite samples was investigated using simultaneous thermogravimetry (TG/DTG) and differential thermal analysis (DTA) techniques. It was observed that all bentonite samples exhibit 2 weight loss
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Thermogravimetry of dihydroxyviolanthrone esters

Thermochimica Acta, 1982
Abstract Dihydroxyviolanthrone esters of straight chain alkanoic acids contain a thermally stable aromatic system connected by an ester linkage to an aliphatic hydrocarbon moiety. These esters provide excellent models for studying the different pyrolysis behavior of aliphatic and aromatic structures. Using dynamic and isothermal thermogravimetry, the
Albrecht H. Granzow, R. G. Ferrillo, E. Klingsberg   +2 more
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Temperature Calibration in Thermogravimetry

1980
Five magnetic materials have been tested and certified as temperature reference materials for thermogravimetry. Use of these materials will enable the relating of data from thermobalances of different designs.
Paul D. Garn, Oscar Menis, Hans-Georg Wiedemann   +2 more
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Thermogravimetry of some copolymers

Thermochimica Acta, 1974
In order to produce more thermally stabIe materials it is desirable to be able to relate stability and chemical structures Some guides in this direction have already been defined. For example it is now accepted that crosshnking increases stability. The development of a technique r for synthesising polymers of controlled chemical structure makes it ...
J.R. MacCallum, K. Paterson, D.H. Richards   +2 more
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Image furnace for thermogravimetry

Journal of Physics E: Scientific Instruments, 1970
A vacuum microbalance system is described in which samples were heated by focused radiation. The heat source was a 1 kW projector lamp and an ellipsoidal mirror. Small specimens of good conductors could be heated rapidly and then continuously weighed at controlled temperatures of up to 1000°C, while the rest of the vacuum system remained cool ...
J W Linnett, W T Bordass
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Thermogravimetry of manganese dioxides

Thermochimica Acta, 1994
Abstract A number of manganese dioxides have been synthesized and investigated by X-ray diffraction, electron microscopy and thermogravimetry under flowing oxygen. The TG curves show, (a) water loss, (b) release of OH-water, and (c) oxygen release.
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Points to be considered in thermogravimetry

Materials and Corrosion, 1993
AbstractContinuous thermogravimetry is a common method to test materials in gaseous corrosive environments at high temperatures and to elucidate kinetics and mechanisms of high temperature corrosion. Recommendations how to conduct thermogravimetric tests are collected here, points to be considered including sample size and form, surface preparation ...
James F. Norton, S. Mrowec, Willem J. Quadakkers, Z. Zurek, F. Gesmundo, W. Auer, D. B. Meadowcroft, D. J. Hall, F. Bregani, H. J. Grabke, M. J. Bennett, S. R. J. Saunders   +11 more
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Vapor pressure determination by thermogravimetry

Thermochimica Acta, 2001
A method for measuring the vapor pressures of a wide range of materials using a conventional thermobalance and standard sample holders is described. The equipment is calibrated using pure reference materials of known vapor pressure and exploiting the relationship between volatilization rate and vapor pressure based on the Langmuir equation for free ...
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