New observation of phase transition sequence in NBT
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New observation of phase transition sequence in NBT 2theta 8.55 8.6 8.65 2theta 12.15 12.2 12.25 2theta 10.5 10.55 10.6 2theta 9.6 9.8 10 10.2 Temp (ºC) Space group Phase Frac. a (Å) b (Å) c (Å) β (º) Fit Values 25 Cc 73% 9.52688 9 5.48220 3 5.5084 92 125.36 30 Rp = 4.97% wRp = 6.87% Pm-3m 27% 3.88500 3 3.88500 3 3.8850 03 90 100 Cc 38% 9.52184 5 5.48622 0 5.5130 125.29 41 Rp = 4.67% wRp = 6.20% Pm-3m 62% 3.88735 1 3.88735 1 3.8873 51 90 250 Cc 13% 9.53996 5.50071 8 5.5136 08 125.29 70 Rp = 3.95% wRp = 5.01% Pm-3m 87% 3.89346 0 3.89346 0 3.8934 60 90 300 P4bm - 5.50779 2 5.50779 2 3.8995 72 90 Rp = 4.06% wRp = 5.11% 400 P4bm - 5.51526 2 5.51526 2 3.9058 51 90 Rp = 3.91% wRp = 4.90% 600 Pm-3m - 3.91213 5 3.91213 5 3.9121 35 90 Rp = 4.24% wRp = 5.70% Pm-3m Cc 600º C 400º C 300º C 250º C 100º C 25ºC 110 111 200 ½(310) ½(311) 110 111 200 ½(311 ) High Resolution Diffraction Rietveld refinement of 250ºC Pattern
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New observation of phase transition sequence in NBT. High Resolution Diffraction. Rietveld refinement of 250 º C Pattern. 600º C 400º C 300º C 250 º C 100º C 25 º C. Pm-3m Cc. ½(310) ½(311). 200. 110. 111. ½(311). 110. 111. 200. - PowerPoint PPT Presentation
Transcript of New observation of phase transition sequence in NBT
New observation of phase transition sequence in NBT
2theta
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12.15 12.2 12.25
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10.5 10.55 10.6
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9.6 9.8 10 10.2
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Temp (ºC)
Space group
Phase Frac.
a (Å) b (Å) c (Å) β (º) Fit Values
25 Cc 73% 9.526889 5.482203 5.508492 125.3630 Rp = 4.97%wRp = 6.87%Pm-3m 27% 3.885003 3.885003 3.885003 90
100 Cc 38% 9.521845 5.486220 5.5130 125.2941 Rp = 4.67%wRp = 6.20%Pm-3m 62% 3.887351 3.887351 3.887351 90
250 Cc 13% 9.53996 5.500718 5.513608 125.2970 Rp = 3.95%wRp = 5.01%Pm-3m 87% 3.893460 3.893460 3.893460 90
300 P4bm - 5.507792 5.507792 3.899572 90 Rp = 4.06%wRp = 5.11%
400 P4bm - 5.515262 5.515262 3.905851 90 Rp = 3.91%wRp = 4.90%
600 Pm-3m - 3.912135 3.912135 3.912135 90 Rp = 4.24%wRp = 5.70%
Pm-3mCc
600ºC 400ºC300ºC250ºC100ºC25ºC
110 111 200
½(310) ½(311)
110 111 200½(311)
High Resolution Diffraction Rietveld refinement of 250ºC Pattern
