Order–disorder transition in Nd2−yGdyZr2O7 pyrochlore solid solution: An X-ray diffraction and Raman spectroscopic study

Synthesis, X-ray Rietveld analysis, infrared and Mössbauer spectroscopy of R 2 FeSbO 7 (R 3+ = Y, Dy, Gd, Bi) pyrochlore solid solution

“…From the X-ray diffraction peaks, crystallite size (d) was estimated using = 2.355σ. The particle size was thus found to be 37.8, 30, 38, 39 nm, respectively, for these polycrystalline samples (R = Y, Dy, Gd, Bi) and was consistent with the stannate R 2 Sn 2 O 7 [9] and zirconate R 2 Zr 2 O 7 pyrochlores [14,15].…”

Investigation about thermal conductivities of La2Ce2O7 doped with calcium or magnesium for thermal barrier coatings

“…Thus, it can be concluded from Fig. 1 [32][33][34].The pyrochlore oxides were found to be stable when the radius ratio (r A /r B ) of the cations lies in range 1.46-1.78 [35]. Mandal et al have reported this radius ratio as 1.2-1.6 [32].…”

Preparation and fluorite–pyrochlore phase transformation in Gd2Zr2O7

“…2(g) and 2(h). Their corresponding Miller indices are (1 1 1), (3 1 1), (3 3 1) and (5 1 1) [15,16]. Rietveld refinement results show that these two samples have 100% pyrochlore phase.…”