The Application of Differential Scanning Calorimetry to the Measurement of Specific Heat

Richardson, M.J.

doi:10.1007/978-1-4615-3286-6_18

Cited by 15 publications

(7 citation statements)

References 18 publications

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“…22 Taking adequate care of these issues facilitates obtaining reliable transformation temperature data using thermal analysis techniques. 23 To begin with, the relevant experimental details are presented briefly in the following section.…”

Section: Introductionmentioning

confidence: 99%

Differential scanning calorimetry study of diffusional and martensitic phase transformations in some 9 wt-%Cr low carbon ferritic steels

Ganesh

Raju

Kumar

et al. 2011

Materials Science and Technology

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The results of a comprehensive characterisation study of different phase transformations that take place upon heating and cooling in some low carbon, 9 wt-%Cr steels with varying concentrations of microalloying additions are presented in this paper. The steels investigated include: standard 9Cr–1Mo grade, V and Nb added modified 9Cr variety, controlled silicon added versions of plain 9Cr variety, (Ni+Mn) content controlled modified 9Cr welding consumables and one composition of W, Ta added reduced activation steel. The various on-heating diffusional phase changes up to the melting range and subsequent rapid cooling induced martensitic transformations are investigated in a controlled manner using differential scanning calorimetry under different heating and cooling rates, in the range 1–100 K min−1. In addition to the accurate determination of A c1, A c3, M23C6, MX carbide dissolution and δ-ferrite formation temperatures upon heating, the melting range and the associated fusion enthalpy have also been established for these steels. The effect of prolonged thermal aging at temperatures of 823–873 K on austenite formation characteristics has also been investigated for standard and modified 9Cr–1Mo steels. The critical cooling rate for the formation of martensite on cooling from single phase austenite region is estimated to be about 4–5 K min−1 for all 9Cr steels investigated in this study. The effect of holding at 1273 K in the austenite region on martensite start temperature Ms, has also been evaluated as a part of this study. The experimental results are discussed in the light of the prevailing understanding of the physical metallurgy of high chromium low carbon steels.

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Section: Introductionmentioning

confidence: 99%

Differential scanning calorimetry study of diffusional and martensitic phase transformations in some 9 wt-%Cr low carbon ferritic steels

Ganesh

Raju

Kumar

et al. 2011

Materials Science and Technology

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“…A more widely accessible and versatile method (although much less accurate), which employs considerably smaller samples (about 10-100 mg) is differential scanning calorimetry (DSC). The reported accuracies of heat capacity determinations by DSC vary considerably, but it is generally accepted that realistic uncertainties for careful routine work are in the range of 3-5% [10,11]. These measurements involve three consecutive experiments [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…The reported accuracies of heat capacity determinations by DSC vary considerably, but it is generally accepted that realistic uncertainties for careful routine work are in the range of 3-5% [10,11]. These measurements involve three consecutive experiments [11][12][13]. First, the zero line is recorded using two empty crucibles.…”

Section: Introductionmentioning

confidence: 99%

“…This procedure is, in principle, very straightforward, but a variety of experimental problems (e.g. baseline definition and balancing, calibration, sample preparation, reproducible positioning of the crucibles in successive runs) must be recognized and overcome in order to obtain accuracies and precisions in the lower end of the range indicated above [11,13,14]. A faster and simpler alternative to DSC is provided by the drop calorimetry technique [4].…”

Section: Introductionmentioning

confidence: 99%

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A new calorimetric system to measure heat capacities of solids by the drop method

Bernardes

Santos

Piedade

2006

Meas. Sci. Technol.

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A new electrically calibrated calorimetric system to measure heat capacities of solids has been designed and tested by determining the heat capacity of sapphire and benzoic acid in the temperature range 298–393 K. Comparison of the obtained results with recommended adiabatic calorimetry data showed that the maximum and average absolute deviations were 3.3% and 1.6%, respectively. The technique provides a convenient alternative to routine heat capacity determinations by DSC, since the experiments are faster and, in general, the results have better accuracy. In addition, the sample cells can be kept under argon or nitrogen atmosphere thus enabling the study of air sensitive compounds.

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“…This technique is commonly used in the fields of materials science, chemistry, and pharmaceuticals to study the thermal behavior of materials and to develop new materials with specific thermal properties. [55][56][57] The rate of heat transfer through convective heat transfer is determined by the properties of the fluid, the velocity of the fluid, and the temperature difference between the two locations. Convective heat transfer is important in many engineering applications, including cooling of electronic devices, air conditioning systems, and heat exchangers.…”

Section: Specific Heat Capacity and Heat Transfer Coefficient Measure...mentioning

confidence: 99%

Doped CeO₂/water nanofluids analyzed the performance of thermal conductivity and heat transfer: An experimental and theoretical investigations

Pandey,

Tiwari,

Paliwal

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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A combined experimental and theoretical study on thermal conductivity, heat transfer specific heat, and electronic properties has been done for doped CeO2/water nanofluid. First, the sol-gel method was implemented for the synthesis of doped CeO2 nanoparticles and then a mixture of nanoparticles with different concentrations of nanofluid. X-ray diffraction and SEM analysis confirm the structural phase purity and homogeneous mixing of nanofluids. Experimental thermal conductivity and specific heat of pure and 4f-doped CeO2 were estimated and found very close to our theoretical calculations. Experimental investigations have been carried out for the measurement of heat transfer using pure and doped CeO2/water nanofluid as the coolant. The experiments were aimed at determining the heat transfer and other thermal properties with different concentrations and with various fluid with Reynolds number 2500 and 3500. The heat transfer coefficient of nanofluids increases not only with an increase in the volume flow rate of the hot water but also increases with increase in the atomic number of dopant elements in CeO2. Electronic states show variation in band gap with doping which may also play an important role in the improvement of solar collectors. It is clear from experimental and theoretical findings that the thermal and electronic properties depend on number of valance electrons. Hence doping of 4f-element in CeO2 plays a vital role to increase the thermal conductivity and tuning of electronic properties leads to many applications in thermal sensors and solar cell-based industries.

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The Application of Differential Scanning Calorimetry to the Measurement of Specific Heat

Cited by 15 publications

References 18 publications

Differential scanning calorimetry study of diffusional and martensitic phase transformations in some 9 wt-%Cr low carbon ferritic steels

Differential scanning calorimetry study of diffusional and martensitic phase transformations in some 9 wt-%Cr low carbon ferritic steels

A new calorimetric system to measure heat capacities of solids by the drop method

Doped CeO₂/water nanofluids analyzed the performance of thermal conductivity and heat transfer: An experimental and theoretical investigations

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The Application of Differential Scanning Calorimetry to the Measurement of Specific Heat

Cited by 15 publications

References 18 publications

Differential scanning calorimetry study of diffusional and martensitic phase transformations in some 9 wt-%Cr low carbon ferritic steels

Differential scanning calorimetry study of diffusional and martensitic phase transformations in some 9 wt-%Cr low carbon ferritic steels

A new calorimetric system to measure heat capacities of solids by the drop method

Doped CeO2/water nanofluids analyzed the performance of thermal conductivity and heat transfer: An experimental and theoretical investigations

Contact Info

Product

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About

Doped CeO₂/water nanofluids analyzed the performance of thermal conductivity and heat transfer: An experimental and theoretical investigations