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Thermodynamic studies of some high temperature systems
KTH, Superseded Departments, Metallurgy.
1997 (English)Doctoral thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: Institutionen för tillämpad processmetallurgi , 1997. , 162 p.
Series
Trita-MET, 97:187
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-2593ISBN: 91-7170-202-4 (print)OAI: oai:DiVA.org:kth-2593DiVA: diva2:8236
Public defence
1997-12-05, 00:00 (English)
Note
QC 2010-05-04Available from: 2000-01-01 Created: 2000-01-01 Last updated: 2010-05-04Bibliographically approved
List of papers
1. Thermodynamic Data of the Rare Earth Sesquioxides
Open this publication in new window or tab >>Thermodynamic Data of the Rare Earth Sesquioxides
1996 (English)Report (Other (popular science, discussion, etc.))
Series
Trita-MEL, 170
National Category
Natural Sciences
Identifiers
urn:nbn:se:kth:diva-12322 (URN)
Note
QC 20100408Available from: 2010-04-08 Created: 2010-04-08 Last updated: 2010-07-16Bibliographically approved
2. Experimental studies of heat capacities of Nd2Fe17, Nd2Fe17N1.49 and Nd2Fe17N1.75 alloys in the temperature range 273-773 K
Open this publication in new window or tab >>Experimental studies of heat capacities of Nd2Fe17, Nd2Fe17N1.49 and Nd2Fe17N1.75 alloys in the temperature range 273-773 K
1998 (English)In: High Temperature Materials and Processes, ISSN 0334-6455, Vol. 17, no 4, 299-311 p.Article in journal (Refereed) Published
National Category
Natural Sciences
Identifiers
urn:nbn:se:kth:diva-12279 (URN)
Note
QC 20100401Available from: 2010-04-01 Created: 2010-04-01 Last updated: 2010-05-04Bibliographically approved
3. Phase Relationships in the System Mn-Co-C
Open this publication in new window or tab >>Phase Relationships in the System Mn-Co-C
1997 (English)In: The Japan Society of Calorimetry and Thermal Analysis - Netsu Sokutei, Vol. 24, no 4, 171-178 p.Article in journal (Refereed) Published
National Category
Natural Sciences
Identifiers
urn:nbn:se:kth:diva-12283 (URN)
Note
QC 20100401Available from: 2010-04-01 Created: 2010-04-01 Last updated: 2010-05-04Bibliographically approved
4. A Galvanic Cell Study Of the Ni-W-O System in the Temperature Range 1034-1317 K
Open this publication in new window or tab >>A Galvanic Cell Study Of the Ni-W-O System in the Temperature Range 1034-1317 K
1994 (English)In: Journal of Chemical Thermodynamics, ISSN 0021-9614, E-ISSN 1096-3626, Vol. 26, no 5, 493-505 p.Article in journal (Refereed) Published
Abstract [en]

Experimental studies of the standard molar Gibbs free energy of formation of NiWO4 have been carried out using a solid-state galvanic cell involving (zirconium oxide + calcium oxide) electrolyte in the temperature range T = 1034 K to 1317 K. The galvanic cell used can be represented as

-Pt|{(1 - δ)Ni + δW}(f.c.c.), NiWO4(s), WO2.72(s)|(1 - x)ZrO2 + x CaO|NiO(s), Ni(s)|Pt+,

where δ « 1. The e.m.f. against temperature plot shows a break at T ≈ 1167 K, indicating a possible phase transformation occurring in the ternary mixture. These studies were complemented by X-ray-diffraction studies of some ternary mixtures equilibrated at T = 1073 K and 1273 K. A thermodynamic assessment of (nickel + tungsten + oxygen) was carried out as part of the present work, incorporating the present results along with those available in the literature for the ternary as well as the three binaries involved. The isothermal sections at T = 1073 K and 1273 K are presented.

Keyword
INTERMETALLIC PHASE; SYSTEM
National Category
Natural Sciences
Identifiers
urn:nbn:se:kth:diva-12278 (URN)10.1006/jcht.1994.1059 (DOI)
Note
QC 20100401Available from: 2010-04-01 Created: 2010-04-01 Last updated: 2011-03-18Bibliographically approved
5. High-temperature Mass Spectrometric Study of the Vaporization of Dysprosium Trifluoride
Open this publication in new window or tab >>High-temperature Mass Spectrometric Study of the Vaporization of Dysprosium Trifluoride
1996 (English)In: Rapid Communications in Mass Spectrometry, ISSN 0951-4198, E-ISSN 1097-0231, Vol. 10, no 5, 501-508 p.Article in journal (Refereed) Published
Abstract [en]

The high-temperature Knudsen effusion method was used to study the vaporization processes and thermodynamic properties of dysprosium trifluoride in the temperature range 1280-1440 K. Data on the partial vapour pressure of DyF3 as a function of temperature and the enthalpy of sublimation of DyF3 were obtained. Using the value of the enthalpy of formation of solid DyF3, available in the literature, the enthalpy of formation of the gaseous molecule of dysprosium trifluoride and its atomization energy were calculated. At 1382 K, the partial vapour pressure of Dy2F6 over dysprosium trifluoride was obtained and the Gibbs energy of the gaseous reaction (Dy2F6)=(2DyF3) was evaluated.

National Category
Natural Sciences
Identifiers
urn:nbn:se:kth:diva-12277 (URN)10.1002/(SICI)1097-0231(19960331)10:5<501::AID-RCM503>3.0.CO;2-Y (DOI)
Note
QC 20100401Available from: 2010-04-01 Created: 2010-04-01 Last updated: 2010-05-04Bibliographically approved

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