TY - JOUR
T1 - High-temperature phase equilibria of the magnesium-niobium-titanate system
AU - Mangham, Robert I.
AU - Petuskey, William
PY - 2005/11
Y1 - 2005/11
N2 - The high-temperature phase equilibria for the MgO-Nb2O5-TiO2 system have been determined in air and at 1 atm O2. Three isothermal sections, namely 1450°, 1350°, and 1250°C, were determined experimentally. From this, the 1000°C isothermal section was deduced by extrapolation. Throughout each diagram, most compounds were found to have an extended range of solubility, each exhibiting the same substitutional pattern of the combination 13(MgNb2)4+ replacing Ti4+. Furthermore, entropic stabilization because of cation mixing is evident for all phases except for the columbite solid solution, in which case the solid solution range decreased with increasing temperature.
AB - The high-temperature phase equilibria for the MgO-Nb2O5-TiO2 system have been determined in air and at 1 atm O2. Three isothermal sections, namely 1450°, 1350°, and 1250°C, were determined experimentally. From this, the 1000°C isothermal section was deduced by extrapolation. Throughout each diagram, most compounds were found to have an extended range of solubility, each exhibiting the same substitutional pattern of the combination 13(MgNb2)4+ replacing Ti4+. Furthermore, entropic stabilization because of cation mixing is evident for all phases except for the columbite solid solution, in which case the solid solution range decreased with increasing temperature.
UR - http://www.scopus.com/inward/record.url?scp=33745305128&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33745305128&partnerID=8YFLogxK
U2 - 10.1111/j.1551-2916.2005.00584.x
DO - 10.1111/j.1551-2916.2005.00584.x
M3 - Article
AN - SCOPUS:33745305128
SN - 0002-7820
VL - 88
SP - 3192
EP - 3197
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 11
ER -