Topic
Calorimeter
About: Calorimeter is a research topic. Over the lifetime, 5878 publications have been published within this topic receiving 77157 citations.
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TL;DR: In this article, anisothermal dilution calorimeter of the Van Ness type is described, suitable for studying either endothermic or exothermic mixing, and the results of measurements of enthalpies of mixing are presented.
68 citations
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TL;DR: Utilizing a thin film vacuum gauge as a fast calorimeter is able to extend the scanning rate range of commercial DSC's to rates as high as 10000 K s(-1) on heating and cooling, allowing us to study the kinetics of extremely fast processes in semicrystalline polymers like reorganization.
Abstract: Reorganization of semicrystalline polymers on heating is a fast process. For poly(ethylene terephthalate) (PET) heating rates of several thousand Kelvin per second are needed to prevent reorganization of unstable crystals. Utilizing a thin film vacuum gauge as a fast calorimeter we are able to extend the scanning rate range of commercial DSC's (μK s−1 to 10 K s−1) to rates as high as 10 000 K s−1 on heating and cooling. Because of the fast equilibration time isothermal experiments can be performed after scanning at several thousand Kelvin per second. The dead time after such a quench is in the order of 10 ms and the time resolution is in the order of milliseconds. These ultra fast calorimeters allow us to study the kinetics of extremely fast processes in semicrystalline polymers like reorganization. For PET crystallized at 130 °C reorganization needs less than 40 ms between 150 °C and 200 °C. Isothermal reorganization at 223 °C is about two orders of magnitude faster than isothermal crystallization from the isotropic melt at the same temperature. The melt memory for the remaining structures needed for reorganization is removed 25 K above the equilibrium melting temperature of PET.
68 citations
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Laboratoire d'Annecy-le-Vieux de physique des particules1, Centre national de la recherche scientifique2, CERN3, University of Milan4, Columbia University5, DSM6, Brookhaven National Laboratory7, Royal Institute of Technology8, University of Sheffield9, Academia Sinica10, Ohio State University11, University of Victoria12, Geneva College13, Stony Brook University14
11 Mar 2010-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this paper, the performance of the ATLAS liquid argon barrel calorimeter was analyzed in a controlled beam and the results showed linearity, uniformity, and resolution with different amounts of material upstream of the barrel and energies ranging from 1 to 250 GeV.
Abstract: During summer and fall 2004, the response of a full slice of the ATLAS barrel detector to different particles was studied in controlled beam. One module of the ATLAS liquid argon barrel calorimeter identical to the production modules and read out by the final front-end and back-end electronics was used for electromagnetic calorimetry. This paper presents and discusses the electron performance of the LAr barrel calorimeter, including linearity, uniformity, and resolution with different amounts of material upstream the calorimeter and energies ranging from 1 to 250 GeV. (C) 2010 Elsevier B.V. All rights reserved.
68 citations
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TL;DR: By separating biofilm cultivation from the actual heat measurement, a high flexibility and a much higher throughput was achieved if compared with conventional calorimeters, and the approach suggested allows cultivation of biofilms in places of interest such as technological settings as well as in nature followed by highly efficient measurements in the laboratory.
67 citations
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TL;DR: In this paper, the C80 micro calorimeter was used to study the thermal stability of several commonly used organic solvents and electrolytes, and it was found that most of the samples are stable in argon atmosphere while decomposing in air atmosphere, and the single organic solvent is more stable than the electrolyte generally.
Abstract: With the extensive applications of lithium-ion batteries, many batteries explosion accidents were reported. The thermal stability of lithium-ion battery electrolyte could substantially affect the safety of lithium-ion battery. The C80 micro calorimeter was used to study the thermal stability of several commonly used organic solvents and electrolytes. The samples were heated in argon atmosphere and air atmosphere, respectively. The chemical reaction kinetics was supposed to fit by an Arrhenius law, then the self-accelerating decomposition temperature was calculated. It is found that most of the samples are stable in argon atmosphere while decomposing in air atmosphere, and the single organic solvent is more stable than the electrolyte generally.
67 citations