6533b85ffe1ef96bd12c1284
RESEARCH PRODUCT
"Reactivity of Cu3Si of different genesis towards copper(I) chloride"
Eric GaffetH SouhaB. GillotFrédéric Bernardsubject
Annealing (metallurgy)Inorganic chemistry[ PHYS.COND.CM-MS ] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]chemistry.chemical_element02 engineering and technologyActivation energy010402 general chemistry01 natural sciencesChlorideIsothermal processchemistry.chemical_compoundmedicineCopper(I) chlorideReactivity (chemistry)Physical and Theoretical ChemistryInstrumentationChemistry021001 nanoscience & nanotechnologyCondensed Matter PhysicsCopper[PHYS.COND.CM-MS] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]0104 chemical sciencesThermogravimetry[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Physical chemistry0210 nano-technologymedicine.drugdescription
Abstract A comparative study of the reactivity between copper(I) chloride and three types of Cu 3 Si obtained in a molten medium (Cu 3 Si-Ref) and from mechanical activation following an annealing process (Cu 3 Si-M2AP) or a self-propagating high-temperature synthesis (Cu 3 Si-MASHS) was performed by thermogravimetry under vacuum using non-isothermal and isothermal methods of kinetic measurement. It was established that for the three Cu 3 Si/CuCl systems, the acceleration and decay stages in the temperature range 145–215°C are very closely approximated by an equation of the Prout–Tompkins type where an autocatalytic process was proposed. The lower apparent activation energy obtained for the Cu 3 Si-MASHS/CuCl system (63 kJ mol −1 against 68 and 78 kJ mol −1 for Cu 3 Si-M2AP and Cu 3 Si-Ref, respectively) has been attributed to a small grain size which induces nanoscale contacts between reactants and impedes CuCl to sublime.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-06-01 |