An adiabatic low-temperature calorimeter for heat capacity measurement of small samples

Tan, Zhi‐Cheng; Sun, Guanyu; Sun, Ying; Yin, Anxiang; Wang, Wenbin; Ye, Jinchun; Zhou, Lixing

doi:10.1007/bf02548664

Cited by 158 publications

(91 citation statements)

References 15 publications

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“…The sample was characterized by melting point measurement, IR, 1 H NMR, 15 C NMR, HPLP and element analysis to identify its molecular structure. The results indicated that the sample was N-(p-methylphenyl)-N'-(2-pyridyl)urea(C 13 N 3 OH 13 ; molecular mass is 227.262).…”

Section: Methodsmentioning

confidence: 99%

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Thermochemical and thermal analysis on N-(p-methylphenyl)-N'-(2-pyridyl)urea

Song

Tan

et al. 2004

Journal of Thermal Analysis and Calorimetry

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Low temperature heat capacities of N-(p-methylphenyl)-N'-(2-pyridyl)urea were determined by adiabatic calorimetry method in the temperature range from 80 to 370 K. It was found that there was not any heat anomaly in this temperature region. Based on the experimental data, some thermodynamic function results were obtained. Thermal stability and decomposition characteristics analysis of N-(p-methylphenyl)-N'-(2-pyridyl)urea were carried out by DSC and TG. The results indicated that N-(p-methylphenyl)-N'-(2-pyridyl)urea started to melt at ca. 426 K (153°C) and the melting peak located at 447.01 K (173.86°C). The melting enthalpy was 204.445 kJ mol -1 (899.6 J g -1 ). The decomposition peak of N-(p-methylphenyl)-N'-(2-pyridyl)urea was found at 499.26 K (226.11°C) from DSC curve. This result was similar with that from TG and DTG experiment, in which the mass loss peak was determined as 500.4 K (227.2°C).

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Section: Methodsmentioning

confidence: 99%

“…The calorimetric apparatus and measuring technique have been described in detail [14][15][16][17][18]. Briefly, it is an adiabatic calorimeter with intermittent energy inputs and temperature equilibration after each input.…”

Section: Low Temperature Calorimetry Experimentsmentioning

confidence: 99%

Thermochemical and thermal analysis on N-(p-methylphenyl)-N'-(2-pyridyl)urea

Song

Tan

et al. 2004

Journal of Thermal Analysis and Calorimetry

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show abstract

“…The performance of this calorimeter and the details of its constitution have been previously described [7]. The data were automatically collected using a Data Acquisition/Switch Unit (Model 34970A; Aglient, USA) and processed by a computer.…”

Section: Adiabatic Calorimetermentioning

confidence: 99%

Low-temperature heat capacity and thermal decomposition of crystalline [Er2(His·H+)(H2O)8](ClO4)6·4H2O

et al. 2004

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“…The construction of the calorimeter has been described previously in detail [4]. Brie¯y, the calorimeter included a sample cell, a thermometer, a heater, two adiabatic shields, two sets of 8-junction chromel± copel thermocouples and a high vacuum system.…”

Section: Adiabatic Calorimetrymentioning

confidence: 99%