Abstract
Applications of differential thermal analysis under high-pressure gas atmospheres are critically reviewed. High-pressure differential scanning calorimetry and thermogravimetry are described. The influence of gas pressure (partial pressure of carbon dioxide and water vapor) on decarbonation reactions is intensively discussed with new results and interpretations. Other applications of high-pressure DTA to materials science and engineering are also reviewed, i.e. dehydration, oxidation and other inorganic and organic reactions, and phase transitions such as boiling, melting and polymorphism. Materials which are used under normal pressure are often characterized more clearly by analysis under high-pressure gas atmospheres; e.g. separation of superimposed DTA peaks (two endothermic peaks or an endothermic peak and an exothermic peak), evaluation of oxidation stability, determination of self-ignition temperature, etc. Prospects for high-pressure DTA are also discussed.
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