Oxygen potential measurements of pyrochlore-type Zr₂M₂O_7+x (M= Pu, Ce) by EMF method

Oxygen potential measurements of fluorite-type Zr0.5Pu0.5O2−y by EMF method

“…The same double compartment-type EMF cell as used in the previous study [5] on the P-type Zr 2 Pu 2 O 7+x was employed in the present study: Pt/O 2 in dry air/Stabilized Zr(Ca)O 2Àx /F-type Zr 0.5 Pu 0.5 O 2Ày /Pt. The detail has been already described in [5].…”

“…The P-type Zr 2 Pu 2 O 7+x pellets (typically, 4 mm in diameter and 1 mm in thickness, $100 mg in weight) were prepared by the ceramic method mentioned in the previous study [5]. The P-type Zr 2 Pu 2 O 7+x pellets were heated in air at 1573 K for 6 h. Afterwards, some of the pellets were ground to powders and identified to be the single F-type phase by the XRD method (RAD-2X, Regaku Denki Co. Ltd., Japan).…”

“…In the previous study [5], the oxygen potentials (g(O 2 )) of pyrochlore-type (P-type) Zr 2 Pu 2 O 7+x , in which the Zr and Pu ions are ordered and excess oxygens (x) are incorporated into the ordered oxygen vacancy (V O ) sublattice, have been clarified. In the present study, the g(O 2 ) of the fluorite-type (F-type) Zr 0.5 Pu 0.5 O 2Ày in which the Zr and Pu ions are disordered and the disordered V O (y) are introduced into the oxygen sublattice, have been investigated.…”

“…The present study focuses on F-type Zr 0. 5 data over the y range (0 6 y < 0.10) using the same EMF method. The room temperature powder XRD study was also made for the phase analysis and lattice parameter (a 0 ) determination of the system.…”

“…The previous study [5] has focused on P-type Zr 2 Pu 2 O 7+x and obtained the g(O 2 ) data using electromotive force (EMF) method. The present study focuses on F-type Zr 0.…”