What kind of reference materials is used in DTA? The ideal reference material is a substance with the same thermal mass as the sample, but with no thermal events over the temperature range of interest.
What kind of reference materials is used in DTA?
The ideal reference material is a substance with the same thermal mass as the sample, but with no thermal events over the temperature range of interest. In DTA is usually used alumina (Al2O3), carborundum(SiC) or magnesium oxide(MgO) powder as the reference material for the analysis of inorganic compounds.
What is DTA instrument?
The Differential Thermal Analysis (DTA) is a very popular thermal analysis technique to measure endothermic and exothermic transitions as a function of temperature. The instrument is used to characterize pharmaceuticals, food/biologicals, organic chemicals and inorganics.
What is DTA used for?
Differential thermal analysis (DTA) has become a popular thermal analysis (thermoanalytical) technique and is often used to measure the temperature of a material, which in turn is used to measure the endothermic and exothermic phase transitions of material.
What is measured in DTA?
The DTA technique measures the difference between the sample temperature (Ts) and the temperature of a reference (Tr). A plot of Ts – TR over a programmed temperature range will show a series of peaks or step changes that map the temperatures where thermal events occur.
What is difference between TGA and DTA?
TGA measures weight change of a sample over a temperature range, DSC measures heat flow of a sample over a temperature range, and DTA measures heat differences between a reference sample and a sample of interest over a temperature range.
What is DTA principle?
Differential Thermal Analysis (DTA) • Principle: The basic principle involved in DTA is the temperature difference (∆T) between the test sample and an inert reference sample under controlled and identical conditions of heating or cooling is recorded continuously as a function of temperature or time, thus the heat …
What is the other name of DTA?
Definitions of Differential Thermal Analysis (DTA) A technique in which the difference in temperature between the sample and a reference material is monitored against time or temperature while the temperature of the sample, in a specified atmosphere, is programmed.
What is the difference between DTA and TGA?
What is the difference between TGA and DTA?
TGA measures change in mass – loss of weight like evaporation, decomposition when some products are gaseous or even oxidation when metallic samples are gaining weight. DTA helps you to find at which temperatures reactions happen in your material and tells you if these changes are endothermic or exothermic.
Is DTA better than DSC?
Differential thermal analysis (DTA) is suited for the determination of characteristic temperatures, while differential scanning calorimetry (DSC) additionally allows for the determination of caloric values such as the heat of fusion or heat of crystallisation.
What are the factors affecting DTA?
Discuss factors affecting DTA results
- Environmental factor. The DTA technique is more sensitive to the gaseous environment around the sample than the TG. Furthermore, the reaction of gaseous atmosphere with the sample may also produce extra peaks in the curve.
- Instrumental factors. (a).
- Sample characteristics. (i).