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Subsolidus Phase Equilibria in the System Na 2 O‐Bi 2 O 3 ‐TiO 2 at 1000°C

1978; Wiley; Volume: 61; Issue: 1-2 Linguagem: Inglês

10.1111/j.1151-2916.1978.tb09217.x

1551-2916

Kenji Uchida, Takeshi Kikuchi,

Nuclear Materials and Properties

Subsolidus phase relations in the system Na 2 O‐Bi 2 O 3 ‐TiO 2 at 1000°C were investigated by solid‐state reaction techniques and X‐ray diffraction methods. Five ternary compounds were observed in the system: Na 0.5 Bi 4.5 Ti 4 O 15 ; Na 0.5 Bi 0.5 TiO 3 ; a cubic pyrochlore solid solution composed of xNa 2 O.25Bi 2 O 3 .(75−;x) TiO 2 where x is 2.5 to 3.75; a new compound Na 0.5 Bi 8.5 Ti 7 O 27 indexed with the orthorhombic cell of a = 5.45, b = 5.42, and c = 36.8 Å; and an unidentified phase with the probable composition NaBiTi 6 O 14 .