Time-domain and frequency-domain differential calorimetry
Anno: 1996
Autori: Ferrari C., Salvetti G., Tognoni E., Tombari E.
Affiliazione autori: Istituto di Fisica Atomica e molecolare – CNR, Via del Giardino, 7 – 56127 Pisa, Italy
Abstract: The heat capacity C-p of a sample can be considered as a frequency dependent quantity; its behaviour can reflect the dynamics of enthalpy fluctuations. In order to take into account the dynamic nature of the measured quantity, calorimetry can mimic experimental methods as those of dielectrometry, performing experiments in time domain or in frequency domain.
In this paper, an instrument is presented which is based on a calorimetric method meeting these requirements, and thus allowing to study sample dynamics of very viscous systems as glasses and some supercooled liquids. Moreover, experimental procedures permitting investigation of samples undergoing chemical and/or physical transformations by simultaneous measurements of enthalpy variation, heat capacity and, under certain conditions, thermal conductivity, are discussed.
Giornale/Rivista: JOURNAL OF THERMAL ANALYSIS
Volume: 47 (1) Da Pagina: 75 A: 85
Parole chiavi: Calorimetry; Enthalpy; Heat capacity; Thermal conductivityDOI: 10.1007/BF01982687Citazioni: 2dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-04Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui
