Preparation and characterization of ceria magnesium aluminate nano powder for thermal barrier application

摘要

The present work deals with the preparation of CeMgAl_(11)O_(19) nano powder by sol gel citric acid route and to investigate its structural, surface and thermo-mechanical properties, to access its suitability for thermal barrier application. The XRD profile of the CeMgAl_(11)O_(19) powder heat treated at different temperatures confirms polycrystalline structure. From the XRD data, mean grain size, lattice strain energy, dislocation density and other structural parameters have been investigated and reported. Thermal properties of the as synthesized CeMgAl_(11)O_(19) powder have been studied from the TG-DTA and DSC measurement and the results are presented. Thermal conductivity of the CeMgAl_(11)O_(19) specimen heat treated at different temperatures has been evaluated using the physical property measurement system and the results have been discussed.