Calorimetric analysis of dysprosia and dysprosia-doped zirconia ceramics

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DOIResolve DOI: http://doi.org/10.1007/s10973-011-2033-4
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TypeArticle
Journal titleJournal of Thermal Analysis and Calorimetry
ISSN1388-6150
Volume110
Issue3
Pages10611067; # of pages: 7
Subjectcalorimetry; zirconia; 7YSZ; dysprosia; plasma spray
AbstractDysprosia (Dy2O3) and dysprosia-doped ZrO2 (*10 wt% Dy2O3) samples were subjected to calorimetric and thermal analyses to understand the effect of dysprosia doping on the thermal properties of ZrO2 and to compare the thermal conductivity of dysprosia-doped ZrO2 (DySZ) to standard 7YSZ (7 wt% Y2O3 in ZrO2). All doped samples were plasma sprayed and subsequently sintered to ensure material densification (reduced porosity for bulk property analysis) and sufficient diffusion of constituents throughout the samples. Differential scanning calorimetry was used to measure the specific heat capacity values for powder and sintered samples as a function of temperature. The thermal conductivities of sintered samples were measured using laser flash techniques. The results showed that the addition of dysprosia to ZrO2 has lowered both the specific heat capacity and thermal diffusivity when compared to the standard 7YSZ. The resulting thermal conductivity of DySZ was 75% lower than that of 7YSZ under the sintered condition.
Publication date
LanguageEnglish
AffiliationNRC Institute for Aerospace Research; National Research Council Canada
Peer reviewedYes
NPARC number19726597
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Record identifier7ca235cd-819a-4770-9201-5d53e7f52667
Record created2012-03-26
Record modified2016-05-09
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