Phase equilibria of the PbO-MgO-TiO 2 and PbO-Nb 2O 5-TiO 2 systems have been experimentally determined at 1000°C and 1 atm pressure. This work is part of an overall comprehensive thermal analysis of the ferroelectric relaxor system Pb(Mg 1/3Nb 2/3)O 3-PbTiO 3. In the PbO-MgO-TiO 2 system, lead titanate equilibrates with each of the magnesium titanates, MgO and a titania saturated liquid lead oxide. The most significant feature in the PbO-Nb 2O 5-TiO 2 system is the extent of solid solution of the lead and oxygen-defect pyrochlore phase, Pb 3(Nb 1-xTi x) 4O 13, in which titanium dissolution is as much as x = 0.394 (or ∼22.5 cation % Ti 4+).
|Original language||English (US)|
|Number of pages||11|
|Publication status||Published - 2005|
ASJC Scopus subject areas
- Ceramics and Composites