Thermodynamic Studies at Higher Temperatures of the Phase Relationships of Substoichiometric Plutonium and Uranium/Plutonium Oxides

Ole Toft Sørensen

Thermodynamic Studies at Higher Temperatures of the Phase Relationships of Substoichiometric Plutonium and Uranium/Plutonium Oxides

Ole Toft Sørensen

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Abstract

Partial molar thermodynamic quantities for oxygen in non-stoichiometric Pu and U/Pu oxides were determined by thermogravimetric measurements in CO/CO2 mixtures in the temperature range 900-1450°C. A detailed analysis of the thermodynamic data obtained, as well as data previously published for these oxides, shows that the substoichiometric phase range in the phase diagram, previously described as a grossly non-stoichiometric single phase, can be divided into several subregions each with a characteristic type of defect. The pattern of subregions found for the mixed oxides is not the same as that found for PuO2-x because of the greater stability of the mixed oxides.

Original language	English
Title of host publication	Plutonium 1975 and Other Actinides
Number of pages	978
Place of Publication	Amsterdam
Publisher	North-Holland
Publication date	1976
Pages	123-131
ISBN (Print)	044411050X
Publication status	Published - 1976
Event	5th International Conference on Plutonium and Other Actinides - Baden-Baden, Germany Duration: 10 Sept 1976 → 13 Sept 1976 Conference number: 5

Conference

Conference	5th International Conference on Plutonium and Other Actinides
Number	5
Country/Territory	Germany
City	Baden-Baden
Period	10/09/1976 → 13/09/1976

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@inproceedings{223b71d204954ed09dabb96d7fb1dce6,

title = "Thermodynamic Studies at Higher Temperatures of the Phase Relationships of Substoichiometric Plutonium and Uranium/Plutonium Oxides",

abstract = "Partial molar thermodynamic quantities for oxygen in non-stoichiometric Pu and U/Pu oxides were determined by thermogravimetric measurements in CO/CO2 mixtures in the temperature range 900-1450°C. A detailed analysis of the thermodynamic data obtained, as well as data previously published for these oxides, shows that the substoichiometric phase range in the phase diagram, previously described as a grossly non-stoichiometric single phase, can be divided into several subregions each with a characteristic type of defect. The pattern of subregions found for the mixed oxides is not the same as that found for PuO2-x because of the greater stability of the mixed oxides.",

author = "S{\o}rensen, \{Ole Toft\}",

year = "1976",

language = "English",

isbn = "044411050X",

pages = "123--131",

booktitle = "Plutonium 1975 and Other Actinides",

publisher = "North-Holland",

note = "5th International Conference on Plutonium and Other Actinides ; Conference date: 10-09-1976 Through 13-09-1976",

}

TY - GEN

T1 - Thermodynamic Studies at Higher Temperatures of the Phase Relationships of Substoichiometric Plutonium and Uranium/Plutonium Oxides

AU - Sørensen, Ole Toft

N1 - Conference code: 5

PY - 1976

Y1 - 1976

N2 - Partial molar thermodynamic quantities for oxygen in non-stoichiometric Pu and U/Pu oxides were determined by thermogravimetric measurements in CO/CO2 mixtures in the temperature range 900-1450°C. A detailed analysis of the thermodynamic data obtained, as well as data previously published for these oxides, shows that the substoichiometric phase range in the phase diagram, previously described as a grossly non-stoichiometric single phase, can be divided into several subregions each with a characteristic type of defect. The pattern of subregions found for the mixed oxides is not the same as that found for PuO2-x because of the greater stability of the mixed oxides.

AB - Partial molar thermodynamic quantities for oxygen in non-stoichiometric Pu and U/Pu oxides were determined by thermogravimetric measurements in CO/CO2 mixtures in the temperature range 900-1450°C. A detailed analysis of the thermodynamic data obtained, as well as data previously published for these oxides, shows that the substoichiometric phase range in the phase diagram, previously described as a grossly non-stoichiometric single phase, can be divided into several subregions each with a characteristic type of defect. The pattern of subregions found for the mixed oxides is not the same as that found for PuO2-x because of the greater stability of the mixed oxides.

M3 - Article in proceedings

SN - 044411050X

SP - 123

EP - 131

BT - Plutonium 1975 and Other Actinides

PB - North-Holland

CY - Amsterdam

T2 - 5th International Conference on Plutonium and Other Actinides

Y2 - 10 September 1976 through 13 September 1976

ER -

Thermodynamic Studies at Higher Temperatures of the Phase Relationships of Substoichiometric Plutonium and Uranium/Plutonium Oxides

Abstract

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