Thermal conduction behavior in polycrystalline (Sr 1-x ,K 2x )Zr 4 (PO 4 ) 6 ceramic

Dean-Mo LIu*, Chien Jen Chen, Li Jiaun Lin

*Corresponding author for this work

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

Single-phase (Sr 1-x ,K 2x )Zr 4 (PO 4 ) 6 ceramic (with x=0.0-0.8) demonstrated values of thermal conductivity decrease with increasing potassium content to a minimum value at x=0.5, which suggests a maximum content of lattice defect, i.e., oxygen vacancy, at this composition. The thermal conductivity of the ceramic then increased with further increase of potassium. The thermal conduction in (Sr 1-x ,K 2x )Zr 4 (PO 4 ) 6 ceramic (at x=0.5) appears to exhibit a strongly lattice-defect dependence with a calculated phonon mean free path of approximately 3.04 Å, rather than a phonon-phonon dependence as observed in a number of dielectric materials. A linear relationship of the thermal conductivity in terms of porosity with temperature up to 600°C has been correlated and can be simply expressed as K=K 0 (1-p) regardless of the influence of emissivity factor.

Original languageEnglish
Pages (from-to)3765-3768
Number of pages4
JournalJournal of Applied Physics
Volume75
Issue number8
DOIs
StatePublished - 1 Dec 1994

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