Conference Dates

November 8-12, 2015


Tantala (Ta2O5) has useful dielectric, optical, catalytic and chemical properties while hafnia (HfO2) has found applications as a high temperature structural ceramic. Tantala and hafnia ceramics have yet to be studied in detailed. During this study, the Ta2O5-HfO2 binary system was investigated using high temperature x-ray diffraction from room temperature to 1650˚C in air using synchrotron radiation. The crystal structures of Ta2O5, HfO2 and Hf6Ta2O17 were examined with their corresponding phase transformations and 3-D thermal expansions.