On the melting behaviour of calcium monoxide under different atmospheres: A laser heating study

Manara, D.; Böhler, R.; Capriotti, Luca; Quaini, A.; Bao, Zhiwei; Boboridis, K.; Luzzi, L.; Janssen, André; Pöml, P.; Eloirdi, R.; Konings, R.J.M.

doi:10.1016/j.jeurceramsoc.2013.12.018

Cited by 24 publications

(31 citation statements)

References 46 publications

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“…The data regarding the melting of CaO were reviewed by Liang et al [18] and discussed by Manara et al [19]. Due to very delicate experimental work, conflicting values ranging from 2843 K to 3223 K have been reported in the literature data.…”

Section: Data Relative To the Melting Of Caomentioning

confidence: 99%

“…It is to be noted that both the measurements and their interpretation are challenging, as it is unsure whether CaO is melting or boiling, if the reaction is congruent or not, and even whether the compound is stoichiometric or not at such high temperatures [10]. Manara et al [19] conducted a remarkable experimental study of the melting of CaO by quasi-containerless laser heating under different atmospheres. Under an oxidizing environment (air at 0.3 MPa), the authors measured a solidification point at 3222±25 K that they attributed to the congruent melting of CaO due to the seemingly negligible influence of the pressure on the measured value.…”

Section: Data Relative To the Melting Of Caomentioning

confidence: 99%

“…12 was optimized along with the parameters A, B and C of Eq. 13 using the liquid heat content data obtained by molecular dynamics by Alvares et al [37] and converted in heat capacity, the heat content data point at 3200 K obtained by the same authors by ab initio molecular dynamics, the melting point of 3222 K measured by Manara et al [19], the enthalpy of fusion of 80.92 kJ.mol -1 calculated by Alvares et al [37] and the corresponding entropy of fusion of 25.12 J.mol -1 .K -1 . A higher weight was assigned to the data relative to the melting of CaO in this process.…”

Section: Data Selection and Optimization Proceduresmentioning

confidence: 99%

“…The associate solution model was used by the authors to describe the liquid phase in the whole composition range. Compared to the description proposed by Lindberg et al [17], the Ca -CaO liquidus was reassessed and the melting point of CaO was revised to a value which is almost 400 K higher than some experimental values in the literature based on a recent investigation conducted by Manara et al [19].…”

Section: Introductionmentioning

confidence: 97%

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Thermodynamic modelling of the Ca–O system including 3rd generation description of CaO and CaO2

Deffrennes

Jakse

Alvares

et al. 2020

Calphad

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A complete thermodynamic description of the Ca-O system is proposed including 3 rd generation modelling of crystalline CaO, liquid and amorphous CaO, and crystalline CaO2. Compared to previous modellings, a more robust description of the thermodynamic properties of the binary phases is achieved using data recently obtained by density functional theory calculations and molecular dynamics simulations. The heat capacity of crystalline CaO is reassessed, leading to a noticeably higher value below the melting point compared to previous modellings and resulting in a slightly higher standard entropy. It is highlighted that the parameters given in terms of polynomial functions of temperature that were employed so far in 3 rd generation models to describe anharmonic contributions in the heat capacity of compounds were not suited to satisfactorily describe the thermodynamic properties of crystalline CaO. It is suggested that this observation can be generalized to most refractory oxides. Alternative terms are proposed in the Gibbs energy function that give more flexibility in fitting the experimental data and lead to more numerically reasonable values for the parameters. The liquid and amorphous CaO phase is described using the two-state model, leading to a significant improvement in the description of its heat capacity. The description of crystalline CaO2 is also improved as only estimates of the thermodynamic properties of the compound were available in previous modellings of the system. Finally, phase equilibria data on the Ca-CaO liquidus is reviewed, and it is highlighted that slight discrepancies in the relatively low temperature measurements can lead to significantly different descriptions of the liquid phase.

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Section: Data Relative To the Melting Of Caomentioning

confidence: 99%

Section: Data Relative To the Melting Of Caomentioning

confidence: 99%

Section: Data Selection and Optimization Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Thermodynamic modelling of the Ca–O system including 3rd generation description of CaO and CaO2

Deffrennes

Jakse

Alvares

et al. 2020

Calphad

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“…The present approach, particularly suited for the laboratory investigation of high-melting materials, has also been employed for the successful analysis of other, more innovative types of nuclear fuels (based, for example, on uranium carbides or nitrides) and other refractory compounds, such as zirconium 9 , tantalum and hafnium carbides, metallic superalloys, calcium oxide 10 , etc.…”

Section: Introductionmentioning

confidence: 99%

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident

Manara

Soldi

Mastromarino

et al. 2017

JoVE

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Major and severe accidents have occurred three times in nuclear power plants (NPPs), at Three Mile Island (USA, 1979), Chernobyl (former USSR, 1986) and Fukushima (Japan, 2011). Research on the causes, dynamics, and consequences of these mishaps has been performed in a few laboratories worldwide in the last three decades. Common goals of such research activities are: the prevention of these kinds of accidents, both in existing and potential new nuclear power plants; the minimization of their eventual consequences; and ultimately, a full understanding of the real risks connected with NPPs. At the European Commission Joint Research Centre's Institute for Transuranium Elements, a laser-heating and fast radiance spectro-pyrometry facility is used for the laboratory simulation, on a small scale, of NPP core meltdown, the most common type of severe accident (SA) that can occur in a nuclear reactor as a consequence of a failure of the cooling system. This simulation tool permits fast and effective high-temperature measurements on real nuclear materials, such as plutonium and minor actinide-containing fission fuel samples. In this respect, and in its capability to produce large amount of data concerning materials under extreme conditions, the current experimental approach is certainly unique. For current and future concepts of NPP, example results are presented on the melting behavior of some different types of nuclear fuels: uranium-plutonium oxides, carbides, and nitrides. Results on the high-temperature interaction of oxide fuels with containment materials are also briefly shown.

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Critical Evaluation and Thermodynamic Optimization of the CaO-P2O5 System

Hudon

Jung

2014

Metall Mater Trans B

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On the melting behaviour of calcium monoxide under different atmospheres: A laser heating study

Cited by 24 publications

References 46 publications

Thermodynamic modelling of the Ca–O system including 3rd generation description of CaO and CaO2

Thermodynamic modelling of the Ca–O system including 3rd generation description of CaO and CaO2

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident

Critical Evaluation and Thermodynamic Optimization of the CaO-P2O5 System

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