Anomalous increase in specific volume upon crystallization of some alloys in the zirconia–yttria–erbia system

Ionic exchange and the local structure in the HfO2/Ho2O3 system studied by PAC spectroscopy

“…Hence, it should be colorless; nevertheless, it is a pale yellow powder due to many lattice defects such as oxygen vacancies, which are commonly present in powder samples. This sesquioxide crystallizes in the structure of the mineral bixbyite and has many technological applications in catalysis [11,12], in the calibration of spectrophotometers, as a dopant in ceramics [13] and glass [14], in thin filmbased capacitors [15], etc. In the last few years HfO 2 and different RE oxides have been deeply studied because of their potential use in Si-based semiconductor technology as a substitute of SiO 2 in metal-oxide-semiconductor field-effect transistors (MOSFETs) [16,17].…”