NEW LEAD-FREE MATERIALS WITH A1/2BI1/2BO3 FORMULA (A=LI, RB; B=TI)
LELIEVRE JEROME 1, REMONDIERE FABIEN 1, MARCHET PASCAL 1 1. CNRS - Université de Limoges, Science des Procédés Céramiques et de Traitements de Surface, UMR 7315, Centre Européen de la Céramique,
12 Rue Atlantis, 87068 Limoges Cedex, France
The formation of new lead-free materials based on alkali/bismuth couple was studied in the ternary system A2O-Bi2O3-TiO2 (A=Li, Rb). The phase identification has been performed by X-ray diffraction. In both case, compounds with perovskite structure were not observed. However, with the lithium-ion, we can notice the formation of a pyrochlore-like compound, isostructural with Bi2Ti2O7. This compound is known as metastable and decomposing at 650°C. Interestingly, in our case it has been stabilized until 1100°C by the addition of lithium.
