Electrical
Materials
Properties to be
considered
Crystalline
Structure
Impacts behind
the concepts
1. Low
permeability(1.26*1
0^-4),RP-100
2.Low
permeability(1.24*1
0^-6),RP-0.9
1. iron can be
anisotropic but an
iron rod shows
isotropic material
properties
2.steel-isotropic
2.FCC-Anisotropic
Material with high
carbon content
have low
permeability which
induce more
magnetic flux lines.
1.Permittivity
2.High Conductivity
3.Resistivity
4.Positive &
negative
temperature coefficient.
1.FCC-isotropic
2.FCC-anisotropic
3.FCC-isotropic
4.FCC-isotropic
1.Positive-Materials
that experience an
increase in
electrical resistance
when their
temperature is
raised.
2.NegativeMaterials that
experience a
decrease in
electrical resistance
when their
temperature is
raised
1.Permittivity
(High dielectric
strength)
2.Highly Resistive
Ceramic-isotropic
Mica-isotropic
glass-isotropic
Variations in
temperature cause
discontinuities in
the permittivity of
a dielectric
material, and have
a significant effect
on the dielectric
constant of a
material.
Magnetic Material
1. Iron
2. steel
3. copper
Conducting Material
1.Silver
2.copper
3.gold
4.aluminium
Insulating Material
Dielectric material
eg:porcelain
(ceramic), mica,
glass, plastics, and
the oxides of
various metals
Dry air is an
excellent dielectric
Distilled water is a
fair dielectric
The permittivity
that a material
exhibits when it is
exposed to an
electric field is
dependent on the
frequency of the
voltage source.
Semiconducting Material
Intrinsic(Si,Ge) and 1.Dopping
Extrinsic(GaP,Ga2.It behaves like an
As) semiconductors insulator at 0 Kelvin
and as temperature
increases, it
behaves like a
conductor.
Ge-highly
anisotropic
Si-fcc-anisotropic
Semiconductor
doping is the
process that
changes an
intrinsic
semiconductor to
an extrinsic
semiconductor.
During doping,
impurity atoms are
introduced to an
intrinsic
semiconductor.