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The phase equilibrium relationship of the Bi 2 O 3 –Fe 2 O 3 –Nd 2 O 3  system at 973 K was established by means of X-ray diffraction. The phase diagram contains 9 single-phase regions, 5 two-phase regions, 7 three-phase regions and no ternary compounds. There are three solid solutions of Bi 1.446 Nd 0.554 O 3 -type,  R 3 c -BiFeO 3  and Pnma-NdFeO 3 . The lattice parameters of the Nd 1- x  Bi   x   O 3  compound increase with increasing Bi 2 O 3  content, but the XRD peaks shift to lower 2 θ  values when  x  is 0–0.75. The effect of different mass percentages of two phases, NdFeO 3  and Bi 25 FeO 40,  on the performance of the sample is explored. When the mass percentage of the second phase Bi 25 FeO 40  increases, the magnetic properties of the samples decrease instead. The sample with a mass ratio of 59 % Bi 25 FeO 40  shows the best adsorption performance. The effective bandwidths of the samples are 2.12 GHz, 2.76 GHz and 2.25 GHz when the mass percentage of the second phase is 17 wt.%, 59 wt.%, and 77 wt.%, respectively.

international journal of materials research

Investigation of the phase relation of the Bi 2 O 3 –Fe 2 O 3 –Nd 2 O 3  system at 973 K and the microwave absorption performance of NdFeO 3 /Bi 25 FeO 40  with different mass ratios