ABSTRACT
This chapter concerns the adiabatic properties of twelvethermitic systems involving some group 3 and lanthanide elements. Binary combinations of scandium (Sc), yttrium (Y), lanthanum (La), cerium (Ce), or lutetium (Lu) and CuO or Bi2O3 are characterized by pyrotechnic adiabatic temperatures. These exothermic combinations are otherwise known as rare earth metal-based thermite compositions or lanthanide-based thermites. Although it should be possible to reduce CeO2 with magnesium (Mg) or aluminum (Al) exothermically, these pairings appear to be far less energetic. The thermochemical descriptions within this chapter were derived from the FactPS and FToxid databases of FactSage 7.0. Each section contains one or twogeneral figures as well as written descriptions of certain fuel-to-oxidizer ratios. Temperature points describe features and points of interest along adiabatic temperature profiles. Similarly, gas points refer to adiabatic gas production profiles. Some adiabatic temperature charts contain flat regions where the adiabatic temperature remains constant despite variations in the stoichiometry of the system. Some of these temperature plateaus are described and explained.
