DerivatographyA complex method in thermal analysis

Paulik, F.; Paulik, J.; Erdey, L.

doi:10.1016/0039-9140(66)80083-8

Cited by 150 publications

(50 citation statements)

References 21 publications

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“…4. The sample is surrounded by a silica chamber, which can be flushed with an inert carrier gas [10]. The evolved gases are removed from the furnace chamber of the derivatograph and transported through the detector at a constant flow Compared to the decomposition curves the following conclusions can be drawn as regards the signal of the detector:…”

Section: Methodsmentioning

confidence: 99%

A simple device for continuous and selective detection of water vapour evolved during thermal decomposition reactions

Kristóf

Inczédy

Paulik

et al. 1979

Journal of Thermal Analysis

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A technique developed for the continuous and selective detection of water vapour formed during thermal decomposition reactions is described.The device can be connected to different types of thermoanalytical instruments without any difficulties. The detector can closely follow changes in the amount of water released during decomposition reactions, with negligible time delay.The signal curves obtained by the detector can be compared to the simultaneously recorded thermoanalytical curves and used to determine the step in which the water was released.The device as a free standing unit can be used to detect water plugs in different gas flows as well.The different techniques of evolved gas detection (EGD) and evolved gas analysis (EGA) are widely used in thermal analysis to detect the volatile products, if any, and to determine the nature and amount of the volatile products formed during the heating process.Different types of thermoanalytical equipment (thermobalance, DTA apparatus, dilatometric equipment) are connected to gas chromatographs Compared to the simple thermoanalytical methods, these complex methods give additional and detailed information on the decOmposition processes.During thermal decomposition processes it is often necessary to know exactly whether or not water vapour has been formed in the reactions, to detect it selectively in the evolved gases, and continuously to record the change in the amount of water released and to measure its approximate amount.In practice a number of techniques are used to determine the water contents of different flowing gases. However, the number of techniques available for determination of the time-dependent water contents of flowing gases is much lower. For example, there are different well-known methods to measure the water contents in flowing gases, based on conductivity [6], coulombmetry [7], piesoelectricity [8] and dew-point determination [9].The above methods are not suitable for thermoanalytical purposes for various reasons: their characteristic curves are non-linear, the instruments are sensitive ot corrosive gases, or the response time is too high.

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Section: Methodsmentioning

confidence: 99%

A simple device for continuous and selective detection of water vapour evolved during thermal decomposition reactions

Kristóf

Inczédy

Paulik

et al. 1979

Journal of Thermal Analysis

Self Cite

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“…The thermal analysis measurements were made with a derivatograph [8] (MOM, Budapest) which performs simultaneous TG, DTG and DTA and measures the temperature T within the sample. The ME spectrometer was a constant acceleration type with linearity better than 0.2 per cent over 95 per cent of the triangular wave form [9].…”

Section: Methodsmentioning

confidence: 99%

Thermal decomposition of potassium hexacyanoferrate(II) trihydrate

Kunrath

Muller

Frank

1978

Journal of Thermal Analysis

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Potassium hexacyanoferrate(II) trihydrate, K4Fe(CN) 6 9 3HeO, was heated under controlled conditions of mass and rate in a derivatograph in the presence of oxygen. The heating was stopped at different temperatures and Mbssbauer spectra and X-ray diffractograms were taken on the quenched material at room temperature. The reaction pathway was studied in this way and the advantages and drawbacks of each of the techniques are described. At different stages of the thermal process we were able to show the presence of K4Fe(CN)~, c~-Fe203, F%O~, FeaC, Fe, FeO, KFeO2,/3-FeOOH, KOCN, K~CO 3 and KCN.

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“…The first heat event can be attributed to dehydration of gypsum. 14 The second weight loss, observed at 310…”

Section: Investigation Of the Studied Bfdmentioning

confidence: 97%

Extraction of zinc from blast‐furnace dust using ammonium sulfate

Saleh

Hassan

2004

J of Chemical Tech & Biotech

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The reaction between roasted zinc blast-furnace dust (BFD) and ammonium sulfate was studied in the temperature range 250-450• C using different molar ratios to determine the maximum extraction of zinc. The reaction products are characterized. The composition of the untreated and roasted BFD, and reaction products was investigated by chemical, thermal, X-ray diffraction and fluorescence analyses. The decomposition of ammonium sulfate leads to the formation of (NH 4 )

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DerivatographyA complex method in thermal analysis

Cited by 150 publications

References 21 publications

A simple device for continuous and selective detection of water vapour evolved during thermal decomposition reactions

A simple device for continuous and selective detection of water vapour evolved during thermal decomposition reactions

Thermal decomposition of potassium hexacyanoferrate(II) trihydrate

Extraction of zinc from blast‐furnace dust using ammonium sulfate

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