Gas concentration programming - a new approach to sample controlled thermal analysis

Sample controlled thermal analysis (SCTA) is the generic name used to describe a family of techniques where the heating rate is not pre-determined as in conventional thermal analysis, but altered as some function of a property of the sample (i.e. mass loss, rate of gas evolution, etc.). We demonstrate here a new form of SCTA, where the reaction rate for gas-solid reactions can be controlled by programming the concentration of the reactive gas whilst keeping the temperature constant.