XRD patterns of the compositions calcined at 1173 K: (a) Ni0.7Mn1.8Co0.5O4, (b) Ni0.7Mn1.5Co0.5Fe0.3O4 and (c) Ni0.7Mn1.77Co0.5Cu0.03O4.
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Full-size image (35 K)
Fig. 2.
SEM images of disc thermistors sintered at 1473 K: (a) Ni0.7Mn1.8Co0.5O4, (b) Ni0.7Mn1.5Co0.5Fe0.3O4 and (c) Ni0.7Mn1.77Co0.5Cu0.03O4.
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