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Which material has the highest-breakdown voltage and ohms?

R

Radium

Jan 1, 1970
0
Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?


Thanks,

Radium
 
P

Palindrome

Jan 1, 1970
0
Radium said:
Hi:

Which material has the highest breakdown voltage and electrical
resistance?

You probably mean highest dielectric strength.

"PBN exhibits extremely high electrical resistivity (yet is uniquely
combined with good directional thermal conductivity) and the highest
dielectric strength of any commercially available material."

Dielectric Strength of 200kV per mm
Can this material block the flow of lightning's megavolts?

You bet.
Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms? Not necessarily

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?

Not necessarily.
 
S

Salmon Egg

Jan 1, 1970
0
Ink on paper.

9^999999999999999999999999999999999999999999999999999999999999999999999999
ohms but only

9^999999999999999999999999999999999999999999999999999999999999999999999998
volts.
 
D

Don Kelly

Jan 1, 1970
0
Possibly you should learn something about high voltage and breakdown. After
you have learned the basics, then come back with (possibly) more intelligent
questions.
 
S

Salmon Egg

Jan 1, 1970
0
Possibly you should learn something about high voltage and breakdown. After
you have learned the basics, then come back with (possibly) more intelligent
questions.
Don,

You are missing the point. This Ra guy is just trying to infuriate us, and
he is succeeding.
-- Fermez le Bush--about two years to go.
 
B

Bob Parker

Jan 1, 1970
0
Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?


Thanks,

Radium

plonk
 
E

Eric Gisse

Jan 1, 1970
0
Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?

Thanks,

Radium

Why don't you do some research?
 
R

Radium

Jan 1, 1970
0
Radium wrote:
You probably mean highest dielectric strength.

"PBN exhibits extremely high electrical resistivity (yet is uniquely
combined with good directional thermal conductivity) and the highest
dielectric strength of any commercially available material."

Dielectric Strength of 200kV per mm
Okay.



You bet.

Are you sure? You're saying that PBN has enough dielectric strength to
block out lightning? PBN can block millions of volts? Sounds too good
to be true.

Not necessarily
Okay.
Not necessarily.

How do ohms and dielectric strength relate? Is their an equation?
 
B

Beachcomber

Jan 1, 1970
0
Why don't you do some research?

Practically speaking... Blocking lightning with an insulator is
difficult, if not impossible. The charge levels can be on the order
of billions of volts and the lightning is going to go somewhere.

Therefore, most, if not all, lightning protection schemes use
conductors, cages, cables, wires, sheet metal and attempt to safely
discharge the current into the ground and divert it from what you want
to protect.

Example, let's say you are driving a car through a thunderstorm.
You're going to generally be safer inside a car with a metal top, than
in a convertable with a non-conductive top, no matter how good an
insulator the roof of the car is made of.

Another example - Skyscrapers in storm areas can get struck hundreds
of times per year, yet the people who work or live in them are much
safer than people just walking around outside. You are generally
going to be surrounded by a conductive steel enclosure and be in
perfect safety.
 
D

David L. Jones

Jan 1, 1970
0
Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?

Thanks,

Radium

You need to talk in terms of Dielectric Strength.
http://en.wikipedia.org/wiki/Dielectric_strength

Ceramics are one of the highest, they are used as the insulators on HV
power lines.

Look at a power pole and take note of the shape of the ceramic
insulators, they are this shape because the air around the insulator
will break down before the insulator will.

Dave.
 
| Are you sure? You're saying that PBN has enough dielectric strength to
| block out lightning? PBN can block millions of volts? Sounds too good
| to be true.

At 200kV/mm a few meters thickness of this stuff should work for you.
The catch is that if the lightning strike does happen, even though the
electrical voltage won't go through, the heat emitted from the arc
could damage the material and the next strike will getcha!
 
U

Uncle Al

Jan 1, 1970
0
Radium said:
Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?

Shitanium Illudium Phosdexate prepared as an incommensruate modulated
crystal lattice has a normalized specific dearcation index of
1.61803. That is the highest normalized specific index there is - by
almost 62% relative.
 
P

PD

Jan 1, 1970
0
Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?

Thanks,

Radium

It's easier to block lightning with a *conductor* than with a
dielectric shield. Google "Faraday cage" and "lightning rod".

Also note that lightning has no real need to travel in a straight line
from A to B. It will usually take the path of least resistance, which
might be somewhat straight, as long as there isn't a sheet of
dielectric in the way. But if there is a path *around* the dielectric
sheet that is lower resistance, then it will certainly take that
route.

Finally, note that people have been electrocuted standing 100 ft or
more away from the tree that lightning struck, as the current
*continued* traveling through the ground.

PD
 
D

Don Kelly

Jan 1, 1970
0
I'm not infuriated. It is really quite asinine so one doesn't know whether
to laugh or cry.

Thanks
 
D

dmm

Jan 1, 1970
0
Shitanium Illudium Phosdexate prepared as an incommensruate modulated
crystal lattice has a normalized specific dearcation index of
1.61803. That is the highest normalized specific index there is - by
almost 62% relative.

What, the shaving cream atom?
 
T

The Ghost In The Machine

Jan 1, 1970
0
In sci.physics.relativity, Uncle Al
<[email protected]>
wrote
Shitanium Illudium Phosdexate prepared as an incommensruate modulated
crystal lattice has a normalized specific dearcation index of
1.61803. That is the highest normalized specific index there is - by
almost 62% relative.

And it can be used to blow up the Earth, in case it obstructs anyone's
view of Venus.

:)
 
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