ISSN:
1551-2916
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Within the series of A2O3-HfO2 phase diagrams (A ranges in cationic radius from Lu3+ to La3+), only those from Gd2Hf2O7 to La2Hf2O7 are known to exhibit a pyrochlore phase field. For A cations smaller than Gd3+, only a disordered fluorite phase field exists. Disorder energies for the entire series of pyrochlore oxides have been determined via atomistic simulation. These energies can be correlated to the order-disorder temperatures from the phase diagrams. Consequently, we predict the existence of hitherto unobserved pyrochlores: Dy2Hf2O7, Ho2Hf2O7, and Er2Hf2O7.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1151-2916.2002.tb00423.x
