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  #901  
Old 06-07-2019, 05:11 AM
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Pressure

With a good hydrolic vise you can get about TWO tons of pressure, but they are fairly expensive for a good one. Mine is older than crap, and I can get a little over a ton. If you are going to press ferrite for core material, you have to do it inside a metal cylinder, and then good luck getting the ferrite "plug" out of the cylinder. I am able to get one out of SIX to come out in one piece no matter WHAT I coat the cylinder with, and I have tried five or six different releasing agents. You also need a plunger with a slight dome on it, rather than one that is completely flat to allow the epoxy resin to be pushed to the sides where it will come out of the cylinder as the epoxy and air bubbles are pressed out and you are left with solid ferrite. If you decide to make cores of ferrite, remember to make them LONG. Long is better than too short. When I get the chance, I wanted to expose the ferrite to a strong magnetic field as it is drying to see if that makes ANY difference the output of the coils.

Pick up a hydrolic vise on eBay
https://www.ebay.com/sch/i.html?_fro...+vise&_sacat=0


Or build one yourself
https://www.youtube.com/watch?v=7BANZRdqFvU
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  #902  
Old 06-07-2019, 09:37 AM
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What an awesome hydraulic vice love to have one. Let me show you
more specifically of what the definition of a Ferrite is, not just in the
broad sense of the idea most associate with iron oxide.

To make a specific Ferrite is to know the response curve you are
looking for and based on that you mix the proper metals with the
iron oxide.

Note: To combine your metal dust means fist a chemical reaction or
reduction that is dried back out to later bind with resin (3-5%)
Rust is not Ferrite.

BTW what you have stated about the relief holes in any mold is
right on all the way.

Casting dies are made in halves so the part may be removed. Take
a close look sometime at a flyback Ferrite the halves of the mold
are different one from another.


Check out this quote from Britannia




A ferrite is
formed by the reaction of ferric oxide (iron oxide or rust) with any
of a number of other metals, including magnesium, aluminum,
barium, manganese, copper, nickel, cobalt, or even iron itself.

A ferrite is usually described by the formula M(FexOy), where M
represents any metal that forms divalent bonds, such as any of the
elements mentioned earlier. Nickel ferrite, for instance, is NiFe2O4,
and manganese ferrite is MnFe2O4; both are spinel minerals. The
garnet mineral known as YIG, containing the rare-earth element
yttrium, has the formula Y3Fe5O12; it is used in microwave circuitry.

The most familiar ferrite, known since biblical times, is magnetite
(lodestone, or ferrous ferrite), Fe(Fe2O4).
Ferrites exhibit a form of magnetism called ferrimagnetism (q.v.),
which is distinguished from the ferromagnetism of such materials
as iron, cobalt, and nickel.

In ferrites the magnetic moments of constituent atoms align themselves
in two or three different directions. A partial cancellation of the magnetic
field results, and the ferrite is left with an overall magnetic field that
is less strong than that of a ferromagnetic material. This asymmetry
on the part of the atomic orientations may be due to
the presence of two or more different types of magnetic ions
,
to a peculiar crystalline structure, or to both.

The term ferrimagnetism was coined by the French physicist
Louis Nťel, who first studied ferrites systematically on the atomic level.

There are several types of ferrimagnetism. In collinear ferrimagnetism
the fields are aligned in opposite directions; in triangular ferrimagnetism
the field orientations may be at various angles to each other. Ferrites
can have several different types of crystalline structures, including
spinel, garnet, perovskite, and hexagonal.


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  #903  
Old 06-07-2019, 04:09 PM
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Core material

For a while now I have wanted to try Bismuth as a core material. Why? It is a ferromagnetic material and you can melt it in a pot on the kitchen stove. Or maybe it isn’t ferromagnetic. Don’t remember. All I know for sure is there is SOME reason I thought it might be worth trying. I have enough to make a couple test cores, but it is just one more thing on my list to try and see what happens. It would be a little expensive as a core material, but if it works, I don’t really care.

EDIT: Yeah, that's right. It's diamagnetic, not ferromagnetic. Meaning it will not be attracted to the rotor magnet as it spins past. IF, and this is a big IF, it produces anything in the wires as a core material. it would be pretty cool. Don't know if it will or not. Haven't tried it yet. The reason I thought it might be interesting is that it has such a low value of thermal conductivity. If it will even work.
Attached Images
File Type: jpg 873F2957-F5FB-40AA-B47C-D6D9A7B3495D.jpg (203.5 KB, 9 views)
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Last edited by Turion; 06-08-2019 at 05:25 AM.
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  #904  
Old 06-07-2019, 04:38 PM
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Wow bismuth is brittle isnít it?
How do you plan to stabilize it with the ferrite?
Elemental bismuth may occur naturally, although its sulfide and oxide form important commercial ores. The free element is 86% as dense as lead. It is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. Bismuth is the most naturally diamagnetic element, and has one of the lowest values of thermal conductivity among metals.
I think it will explode under G-forces.
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  #905  
Old 06-07-2019, 07:54 PM
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AND THEN REALITY, BETTER READ UP BEFORE HAND


https://scholar.google.com/scholar?q=FERRITE+MIX+NI+ZN&hl=en&as_sdt=0&as_vis= 1&oi=scholart

There is one paper talking about nano crystalline ribbon or other that
is an advanced modern process for a low low price. You can order cores
made for a little more.

The ribbon is available for improved transformer designs, next level
intermediate and high frequency applications. We need a good response.

Slow response means heat, to fast means a loss of attraction, loss of
the generators ability to produce. Don't be afraid to grind dust put
them together with known acids, muriatic, sulfuric, boric to etch the
exterior of the particle to get close to each other for proper interaction
as well as bonding.

Patents are written to look like it is impossible to the average Joe when
in fact it is always the guys like Bedini who just start trying things.

Once you have your mixed dust ground and reacted together and dried
back out you are ready for molding. The cool thing about ribbon is that
the dust is heated up and rolled out under extreme pressure then
flash cooled while alignment also takes place.

With tape you can now make any shape for cheap. No more $100-
$1000 dollar core custom jobs.

Remember you are making a doped metal.

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Last edited by BroMikey; 06-07-2019 at 09:13 PM.
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  #906  
Old 06-07-2019, 08:33 PM
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Question

Do the resins form chains within the mixture itself after being fully mixed and cured?
If not, would nylon types of material work for strength?
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  #907  
Old 06-07-2019, 09:31 PM
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Quote:
Originally Posted by Pot head View Post

Do the resins form chains within the mixture itself after being
fully mixed and cured?
If not, would nylon types of material work for strength?
I will be back later to talk about this. The tape machines look like a
foundry where white hot metal is melted and rolled out under pressure.

Ferrite are molded at 2500 degrees using HT epoxies. Epoxies that an
exhaust manifold is made from. They are only a little more money for
these epoxies but you need heat and a mold that can withstand the
process. 3% binder
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  #908  
Old 06-07-2019, 09:39 PM
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SEE FOR YOURSELVES HOW METAL OF THIS TYPE IS PROPERLY FORMED

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  #909  
Old 06-07-2019, 10:08 PM
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Bismuth

I didnít plan to stabilize it at all. Just melt and pour into molds to TRY it as a stand alone core material. If it doesnít work melt it again and stir in a little ferrite powder and pour into molds again. I can keep melting and adding ferrite to see if I get something I like. That is the beauty of Bismith. It may be brittle, but the piece I showed in the picture doesnít break or crumble and the two pieces I showed used to be one, before I cut it in half with a hack saw. If you zoom in you can see the blade marks. Donít know WHAT it will be like melted and poured into forms, but thatís what experimenting is all about.
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  #910  
Old 06-07-2019, 11:57 PM
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Hi all, the bailing wire cores, painted with enamel, etc. seem to not retain the magnetism in the core.
Not sure what is added to the iron bailing wire, though when cut up in straight pieces and made into a core, it seems to not retain any magnetic flux at all.
Not sure how fast it actually releases the flux, compared to typical silicon steel cores.
peace love light
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  #911  
Old 06-08-2019, 12:51 AM
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Quote:
Originally Posted by Turion View Post
I didnít plan to stabilize it at all. Just melt and
pour into molds to TRY it as a stand alone core material. .......... but
thatís what experimenting is all about.

Any info on the use of Bismuth so I can understand the reason for
having it would be deeply appreciated. I see levitation on youtube
but that can't be why (to lighten the rig) you would put this in
Ferrite.

Me no savvy on it's purpose or even a guess what effects it may have.

I like chemistry of all kinds.

Don't be afraid to react your dust with the few commonly used caustics
such as sodium hydroxide or potassium. The few minutes it takes to
dry it out is nominal.

Sulfuric, Boric, Hydrochloric and caustics. The benefits are also reduced
particle size so your compound will not only fit more tightly mechanically
but will connect your dust in a way electrically, magnetically and ionically
as per the data.

We have the advantage of seeing the basics all mapped out for us. If
you have time

This pathway of reacting dust is used for soft low temp Ferrite composites.
The goal is to get the dust particulate to do the same job for less.

I did not know you were capable of melting metal dust or set up for that.




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  #912  
Old 06-08-2019, 03:07 AM
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Quote:
Originally Posted by SkyWatcher View Post
Hi all, the bailing wire cores, painted with enamel, etc. seem to not retain the magnetism in the core.
Not sure what is added to the iron bailing wire, though when cut up in straight pieces and made into a core, it seems to not retain any magnetic flux at all.
Not sure how fast it actually releases the flux, compared to typical silicon steel cores.
peace love light
Good to know, makes sense because bailing wire is very very thin
say 40 thousandths? Then it is separated by the enamel. great
experimenting.

I thought about making "C" cores that way, just roll up some fine wire
and cut a notch out for my magnet. Maybe iron wire can be purchased
with an enamel coating? Humm....
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Last edited by BroMikey; 06-08-2019 at 03:12 AM.
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  #913  
Old 06-08-2019, 04:10 AM
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So in a sense the material implodes upon itself and condenses, like a singularly.
Do they add Preparation H???
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  #914  
Old 06-09-2019, 05:23 AM
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"C" core bobbin construction project.

Constructing and reconstructing, creating and recreating ideas to
accommodate the mechanics of a new design.


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  #915  
Old 06-10-2019, 12:04 AM
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Completed "C" core made of grain oriented material and bobbin. Excellent for longevity, superior mechanical design.




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  #916  
Old 06-10-2019, 07:38 PM
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Hi bromikey, thanks for sharing, very nice work so far.

Yes, the multifilar coil needs strong coil bobbin for sure.

I bet a core like that could be made from the bailing wire also
Would need some sort of jig to wind the shape around and then it can be epoxied together into a solid core piece.
The jig could even be wood and then the core could be secured to the wood jig, then the coil/core assembly can be secured at the wood jig.

Keep up the good work, I watch with anticipation.
peace love light
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