Počet záznamů: 1

Thermal Conductivity of Al2O3–ZrO2 Composite Ceramics

  1. 1.
    0370188 - UFP-V 2012 RIV US eng J - Článek v odborném periodiku
    Hostaša, J. - Pabst, W. - Matějíček, Jiří
    Thermal Conductivity of Al2O3–ZrO2 Composite Ceramics.
    Journal of the American Ceramic Society. Roč. 94, č. 12 (2011), s. 4404-4409 ISSN 1551-2916
    Výzkumný záměr: CEZ:AV0Z20430508
    Klíčová slova: alumina * zirconia * composites * thermal conductivity * model
    Kód oboru RIV: JH - Keramika, žáruvzdorné materiály a skla

    The Al2O3–ZrO2 composite ceramics were prepared by slip casting in plaster molds and sintering at 1350°C in air. The composition of prepared samples varied from pure alumina to doped zirconia (3Y-TZP) with steps of 10 vol%. The relative density of the sintered samples varied from 94% to 98%, depending on the composition. Thermal diffusivity of sintered samples was measured by means of the xenon flash method at 100°C, 200°C, 400°C, 600°C, 800°C, and 1000°C and thermal conductivities were calculated based on measured bulk densities and specific heat data and finally corrected for porosity effects. As expected, the thermal conductivity decreased with increasing zirconia content, and in the case of samples with higher alumina content, it also decreased with increasing temperature. Effective thermal conductivities are close to the lower Hashin–Shtrikman bound and the recently proposed sigmoidal average. Empirical relations were used to fit the dependence of effective thermal conductivity
    Trvalý link: http://hdl.handle.net/11104/0204060