| Effect of Titanium, Zirconium and Niobium on Lattice
Parameter, Density and Magnetic Saturation
Moment of Nio.sZno.sFe204 |
P. K. DAs* AND A. R. DAS
Pages : 9-14
DOI : 10.1080/0371750X.1983.10822609 |
| Abstract |
| Ni0• 5Zn0• 5Fe20 4 powder was prepared by standard ceramic methods
at precalcination and ferritisation temperatures of 800° and 1250°C
respectively. The ferrite was doped with oxides of titanium, zirconium
and niobium in nominal weight percentages of 0.5, 1, 2, 5 and 10 of the
respective oxides. Lattice parameter values and pycnometric densities
of the doped samples were determined. The magnetic saturation
moment as (emu/gm) was determined at room temperature using a
vibrating sample magnetometer at a maximum field of 6.5 koes. The
base ferrite had a density of 5.258 gm/ml, a lattice parameter of
8.3974 A and a as value of 71.44 emujgm. Titanium doped ferrites
showed a sharp fall in lattice parameter up to 0.0240 mole fraction
followed by a monotonic rise at higher concentrations. The density
value first increased and then decreased monotonically. Zirconium
and niobium were slightly soluble up to 0.089 and 0.0012 mole fractions
respectively as indicated by a constancy of the lattice parameters
(at 8.399 A for Zr and 8.398 A for Nb) at higher concentrations.
The density values initially decreased to 5.138 gm/ml and
5.077 gmfml for Zr and Nb doped materials respectively at molar
concentrations of 0.0231 for Zr and 0.0012 for Nb followed by a
subsequent rise in both cases. |
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