Alumina...

[server]

Phil Allison <pallison49@gmail.com> wrote in news:93fa8c1c-2ac8-44ea-
88e2-2bace80f11b3n@googlegroups.com:

Decayed Brain Matter LIAR
======================

Nice try though. The new stuff is quite hard and quite stable and
far better than cooking against Aluminum.

** Bullshit.

Coated pans are orders of magnitude better than cooking against
Aluminum. No bullshit about it, boy.

Google health fanatic or psychosomatic illness.

** And see your name - fuckhead.

I am not the one touting PTFE as hazardous.

And as for the Aluminum FACTS I stated, the issues with Aluminum
have been reported for decades.

I am not a health fanatic and I do not claim illnesses I do not
have. I simply KNOW that Aluminum is bad for the body and I KNOW
that I will stay away from it for that reason. Pretty simple shit,
putz. Notice how we (at least the intelligent among us) do not have
ANY Aluminum utensils.

THAT is why we no longer see bare Aluminum in the stores like
WalMart, because any AL they have is coated or hard anodized. Now
the bottom of the barrel Dollar General might have some cheap chinese
Al pots and pans, but I don\'t buy those. Why? Because I have known
for years... decades even that Aluminum is a bad cooking medium.
Why do you think a restaurant puts oven paper down on their huge
Aluminum baking trays when they fill them up with bacon?

 

[server]

Phil Allison <pallison49@gmail.com> wrote in news:93fa8c1c-2ac8-44ea-
88e2-2bace80f11b3n@googlegroups.com:

Decayed Brain Matter LIAR
======================

Nice try though. The new stuff is quite hard and quite stable and
far better than cooking against Aluminum.

** Bullshit.

Coated pans are orders of magnitude better than cooking against
Aluminum. No bullshit about it, boy.

Google health fanatic or psychosomatic illness.

** And see your name - fuckhead.

I am not the one touting PTFE as hazardous.

And as for the Aluminum FACTS I stated, the issues with Aluminum
have been reported for decades.

I am not a health fanatic and I do not claim illnesses I do not
have. I simply KNOW that Aluminum is bad for the body and I KNOW
that I will stay away from it for that reason. Pretty simple shit,
putz. Notice how we (at least the intelligent among us) do not have
ANY Aluminum utensils.

THAT is why we no longer see bare Aluminum in the stores like
WalMart, because any AL they have is coated or hard anodized. Now
the bottom of the barrel Dollar General might have some cheap chinese
Al pots and pans, but I don\'t buy those. Why? Because I have known
for years... decades even that Aluminum is a bad cooking medium.
Why do you think a restaurant puts oven paper down on their huge
Aluminum baking trays when they fill them up with bacon?

 

[server]

Phil Allison <pallison49@gmail.com> wrote in news:93fa8c1c-2ac8-44ea-
88e2-2bace80f11b3n@googlegroups.com:

Decayed Brain Matter LIAR
======================

Nice try though. The new stuff is quite hard and quite stable and
far better than cooking against Aluminum.

** Bullshit.

Coated pans are orders of magnitude better than cooking against
Aluminum. No bullshit about it, boy.

Google health fanatic or psychosomatic illness.

** And see your name - fuckhead.

I am not the one touting PTFE as hazardous.

And as for the Aluminum FACTS I stated, the issues with Aluminum
have been reported for decades.

I am not a health fanatic and I do not claim illnesses I do not
have. I simply KNOW that Aluminum is bad for the body and I KNOW
that I will stay away from it for that reason. Pretty simple shit,
putz. Notice how we (at least the intelligent among us) do not have
ANY Aluminum utensils.

THAT is why we no longer see bare Aluminum in the stores like
WalMart, because any AL they have is coated or hard anodized. Now
the bottom of the barrel Dollar General might have some cheap chinese
Al pots and pans, but I don\'t buy those. Why? Because I have known
for years... decades even that Aluminum is a bad cooking medium.
Why do you think a restaurant puts oven paper down on their huge
Aluminum baking trays when they fill them up with bacon?

 

[John Walliker]

Amidst all the noisy discussion here, there are some things that seem to be clear:
1) Bulk alumina is well tolerated by the body and has been used for many decades
in implantable devices such as hip implants (*).
2) There is lots of alumina in the environment and it seems to do no harm.
3) There is evidence that soluble compounds of aluminium
can be neurotoxic. For example there were cases of neurological damage to
dialysis patients when the water used was contaminated with aluminium salts.
4) The cause of the symptoms in the Camelford incident is unclear, because
the acidity of the water was thought to have released copper and lead from
the water pipes, so the victims suffered from a cocktail of contaminants.

What is not so clear is what would be the effect of ingesting or inhaling very
finely divided alumina powder. I would be inclined to be careful.

* I once visited a factory in the UK making alumina hip implants. They
manufactured some medical devices for me. They also made small
plates for body armour and much larger ones for armoured vehicles.
There were rows of missile nose cones there. Apparently alumina
was used because it is transparent to radar but survives the extreme
heat of supersonic flight. They made igniters for jet engines too, which
consisted of platinum alloy electrodes fused into alumina insulators.
Hardly any of the commercial alumina products are pure. There is almost
always a small percentage of sodium, calcium and magnesium oxide
based glass which binds grains of pure alumina together. Otherwise, the
firing temperatures would be so high that energy costs would be
prohibitive and the furnaces would have a very short life.
The furnaces I was shown were each the size of a house. Three of them
were operated on a three-week cycle - one week to load the furnace,
one week to fire the contents and one week to unload them.
I wasn\'t allowed to see the smaller, higher temperature ones used
for high-purity alumina in medical devices.

John

 

[John Walliker]

Amidst all the noisy discussion here, there are some things that seem to be clear:
1) Bulk alumina is well tolerated by the body and has been used for many decades
in implantable devices such as hip implants (*).
2) There is lots of alumina in the environment and it seems to do no harm.
3) There is evidence that soluble compounds of aluminium
can be neurotoxic. For example there were cases of neurological damage to
dialysis patients when the water used was contaminated with aluminium salts.
4) The cause of the symptoms in the Camelford incident is unclear, because
the acidity of the water was thought to have released copper and lead from
the water pipes, so the victims suffered from a cocktail of contaminants.

What is not so clear is what would be the effect of ingesting or inhaling very
finely divided alumina powder. I would be inclined to be careful.

* I once visited a factory in the UK making alumina hip implants. They
manufactured some medical devices for me. They also made small
plates for body armour and much larger ones for armoured vehicles.
There were rows of missile nose cones there. Apparently alumina
was used because it is transparent to radar but survives the extreme
heat of supersonic flight. They made igniters for jet engines too, which
consisted of platinum alloy electrodes fused into alumina insulators.
Hardly any of the commercial alumina products are pure. There is almost
always a small percentage of sodium, calcium and magnesium oxide
based glass which binds grains of pure alumina together. Otherwise, the
firing temperatures would be so high that energy costs would be
prohibitive and the furnaces would have a very short life.
The furnaces I was shown were each the size of a house. Three of them
were operated on a three-week cycle - one week to load the furnace,
one week to fire the contents and one week to unload them.
I wasn\'t allowed to see the smaller, higher temperature ones used
for high-purity alumina in medical devices.

John

 

[John Walliker]

Amidst all the noisy discussion here, there are some things that seem to be clear:
1) Bulk alumina is well tolerated by the body and has been used for many decades
in implantable devices such as hip implants (*).
2) There is lots of alumina in the environment and it seems to do no harm.
3) There is evidence that soluble compounds of aluminium
can be neurotoxic. For example there were cases of neurological damage to
dialysis patients when the water used was contaminated with aluminium salts.
4) The cause of the symptoms in the Camelford incident is unclear, because
the acidity of the water was thought to have released copper and lead from
the water pipes, so the victims suffered from a cocktail of contaminants.

What is not so clear is what would be the effect of ingesting or inhaling very
finely divided alumina powder. I would be inclined to be careful.

* I once visited a factory in the UK making alumina hip implants. They
manufactured some medical devices for me. They also made small
plates for body armour and much larger ones for armoured vehicles.
There were rows of missile nose cones there. Apparently alumina
was used because it is transparent to radar but survives the extreme
heat of supersonic flight. They made igniters for jet engines too, which
consisted of platinum alloy electrodes fused into alumina insulators.
Hardly any of the commercial alumina products are pure. There is almost
always a small percentage of sodium, calcium and magnesium oxide
based glass which binds grains of pure alumina together. Otherwise, the
firing temperatures would be so high that energy costs would be
prohibitive and the furnaces would have a very short life.
The furnaces I was shown were each the size of a house. Three of them
were operated on a three-week cycle - one week to load the furnace,
one week to fire the contents and one week to unload them.
I wasn\'t allowed to see the smaller, higher temperature ones used
for high-purity alumina in medical devices.

John

 

[Phil Allison]

Decayed Brain Matter LIAR
======================

Nice try though. The new stuff is quite hard and quite stable and
far better than cooking against Aluminum.

** Bullshit.

Coated pans are orders of magnitude better than cooking against
Aluminum.

** More Bullshit

Google health fanatic or psychosomatic illness.

** And see your name - fuckhead.

I am not the one touting PTFE as hazardous.

** Not am I.


> And as for the Aluminum FACTS I stated,

** No facts - just Bullshit

I am not a health fanatic and I do not claim illnesses I do not
have. I simply KNOW that Aluminum is bad for the body and I KNOW
that I will stay away from it for that reason.

** You know nothing at all.

Not one, single thing.

 

[Phil Allison]

Decayed Brain Matter LIAR
======================

Nice try though. The new stuff is quite hard and quite stable and
far better than cooking against Aluminum.

** Bullshit.

Coated pans are orders of magnitude better than cooking against
Aluminum.

** More Bullshit

Google health fanatic or psychosomatic illness.

** And see your name - fuckhead.

I am not the one touting PTFE as hazardous.

** Not am I.


> And as for the Aluminum FACTS I stated,

** No facts - just Bullshit

I am not a health fanatic and I do not claim illnesses I do not
have. I simply KNOW that Aluminum is bad for the body and I KNOW
that I will stay away from it for that reason.

** You know nothing at all.

Not one, single thing.

 

[Phil Allison]

Decayed Brain Matter LIAR
======================

Nice try though. The new stuff is quite hard and quite stable and
far better than cooking against Aluminum.

** Bullshit.

Coated pans are orders of magnitude better than cooking against
Aluminum.

** More Bullshit

Google health fanatic or psychosomatic illness.

** And see your name - fuckhead.

I am not the one touting PTFE as hazardous.

** Not am I.


> And as for the Aluminum FACTS I stated,

** No facts - just Bullshit

I am not a health fanatic and I do not claim illnesses I do not
have. I simply KNOW that Aluminum is bad for the body and I KNOW
that I will stay away from it for that reason.

** You know nothing at all.

Not one, single thing.

 

[server]

John Walliker <jrwalliker@gmail.com> wrote in
news:5fa27e05-a4ba-4a3e-ac21-ed2ca0cc8311n@googlegroups.com:

snipped great, less noisy alumina story.

Gee Walliker (bet you never heard that before);-) That\'s pretty
cool... errr... hot, man.

 

[server]

John Walliker <jrwalliker@gmail.com> wrote in
news:5fa27e05-a4ba-4a3e-ac21-ed2ca0cc8311n@googlegroups.com:

snipped great, less noisy alumina story.

Gee Walliker (bet you never heard that before);-) That\'s pretty
cool... errr... hot, man.

 

[server]

John Walliker <jrwalliker@gmail.com> wrote in
news:5fa27e05-a4ba-4a3e-ac21-ed2ca0cc8311n@googlegroups.com:

snipped great, less noisy alumina story.

Gee Walliker (bet you never heard that before);-) That\'s pretty
cool... errr... hot, man.

 

[server]

Phil Allison <pallison49@gmail.com> wrote in
news:785a9c99-2576-466a-a45a-6faa551967a3n@googlegroups.com:

Decayed Brain Matter LIAR
======================

Nice try though. The new stuff is quite hard and quite stable
and far better than cooking against Aluminum.

** Bullshit.

Coated pans are orders of magnitude better than cooking against
Aluminum.

** More Bullshit

Google health fanatic or psychosomatic illness.

** And see your name - fuckhead.

I am not the one touting PTFE as hazardous.

** Not am I.


And as for the Aluminum FACTS I stated,

** No facts - just Bullshit


I am not a health fanatic and I do not claim illnesses I do not
have. I simply KNOW that Aluminum is bad for the body and I KNOW
that I will stay away from it for that reason.

** You know nothing at all.

Not one, single thing.

Nice try, but it is one of my favorite songs.
Quite textural.

Way over your head though. You\'ll probaly say something stupid
about it.

<https://www.youtube.com/watch?v=rxj1z2HRwSI>

 

[server]

Phil Allison <pallison49@gmail.com> wrote in
news:785a9c99-2576-466a-a45a-6faa551967a3n@googlegroups.com:

Decayed Brain Matter LIAR
======================

Nice try though. The new stuff is quite hard and quite stable
and far better than cooking against Aluminum.

** Bullshit.

Coated pans are orders of magnitude better than cooking against
Aluminum.

** More Bullshit

Google health fanatic or psychosomatic illness.

** And see your name - fuckhead.

I am not the one touting PTFE as hazardous.

** Not am I.


And as for the Aluminum FACTS I stated,

** No facts - just Bullshit


I am not a health fanatic and I do not claim illnesses I do not
have. I simply KNOW that Aluminum is bad for the body and I KNOW
that I will stay away from it for that reason.

** You know nothing at all.

Not one, single thing.

Nice try, but it is one of my favorite songs.
Quite textural.

Way over your head though. You\'ll probaly say something stupid
about it.

<https://www.youtube.com/watch?v=rxj1z2HRwSI>

 

[Steve Roberts]

Get some Boric Acid.
Buy some Zinc Oxide
Buy some very pure silica sand.
Optional: Lead (II) Oxide
Existing fine Alumina.
Washing Soda or Sodium Bicarbonate, or Sodium Borax,

Various metal salts to add colorants, ie Copper, Manganese, Iron, Cobalt in small amounts (0.05% or less by Weight)

Happy Glassmaking.

Alumina that fine will readily dissolve in the Zinc Oxide flux if there is another salt nearby to bind to.

Boric Acid 3 grams, ZnO 0.5 gm, Lead Oxide 5 grams, 1 gram of Sodium Compound, and up to 2% alumina by weight.

That is my low favorite melting glass recipe # 1 + alumina. Because your Alumina is so fine, it will readily dissolve. You will have to pre-melt the rest of the mixture before adding the Alumina,

I\'m well aware that the PbO is toxic as hell, but if you want a low melting glass (800-900\'C) that can fire in a standard Alumina crucible that is actually clear and self de-bubbling when fired, there are not many alternatives. Unless you like adding Arsenic compounds to your mixture.

Again, VERY TOXIC mix with the Lead.

Steve

My experience is that adding the alumina makes the mixture freeze quickly, but makes a tough Aluminosilicate.

 

[Steve Roberts]

Get some Boric Acid.
Buy some Zinc Oxide
Buy some very pure silica sand.
Optional: Lead (II) Oxide
Existing fine Alumina.
Washing Soda or Sodium Bicarbonate, or Sodium Borax,

Various metal salts to add colorants, ie Copper, Manganese, Iron, Cobalt in small amounts (0.05% or less by Weight)

Happy Glassmaking.

Alumina that fine will readily dissolve in the Zinc Oxide flux if there is another salt nearby to bind to.

Boric Acid 3 grams, ZnO 0.5 gm, Lead Oxide 5 grams, 1 gram of Sodium Compound, and up to 2% alumina by weight.

That is my low favorite melting glass recipe # 1 + alumina. Because your Alumina is so fine, it will readily dissolve. You will have to pre-melt the rest of the mixture before adding the Alumina,

I\'m well aware that the PbO is toxic as hell, but if you want a low melting glass (800-900\'C) that can fire in a standard Alumina crucible that is actually clear and self de-bubbling when fired, there are not many alternatives. Unless you like adding Arsenic compounds to your mixture.

Again, VERY TOXIC mix with the Lead.

Steve

My experience is that adding the alumina makes the mixture freeze quickly, but makes a tough Aluminosilicate.

 

[Steve Roberts]

Get some Boric Acid.
Buy some Zinc Oxide
Buy some very pure silica sand.
Optional: Lead (II) Oxide
Existing fine Alumina.
Washing Soda or Sodium Bicarbonate, or Sodium Borax,

Various metal salts to add colorants, ie Copper, Manganese, Iron, Cobalt in small amounts (0.05% or less by Weight)

Happy Glassmaking.

Alumina that fine will readily dissolve in the Zinc Oxide flux if there is another salt nearby to bind to.

Boric Acid 3 grams, ZnO 0.5 gm, Lead Oxide 5 grams, 1 gram of Sodium Compound, and up to 2% alumina by weight.

That is my low favorite melting glass recipe # 1 + alumina. Because your Alumina is so fine, it will readily dissolve. You will have to pre-melt the rest of the mixture before adding the Alumina,

I\'m well aware that the PbO is toxic as hell, but if you want a low melting glass (800-900\'C) that can fire in a standard Alumina crucible that is actually clear and self de-bubbling when fired, there are not many alternatives. Unless you like adding Arsenic compounds to your mixture.

Again, VERY TOXIC mix with the Lead.

Steve

My experience is that adding the alumina makes the mixture freeze quickly, but makes a tough Aluminosilicate.

 

[whit3rd]

On Friday, November 12, 2021 at 4:02:45 PM UTC-8, amdx wrote:

My son\'s company did a clean out and discarded 2 lbs of high purity
Alumina Powder.

Any fun I can have with it? Anything useful?

Makes a great scouring powder. The low purity stuff (pink especially) makes
a fine UV light show. Mainly, it\'s for ceramists, though, firing into a nice strong
solid with the right binders. High end faucets and my dishwasher use polished
alumina ceramics for their water seals; no lube or washers required, just
accurate flat surfaces in contact.

 

[Sjouke Burry]

On 13.11.21 1:02, amdx wrote:

My son\'s company did a clean out and discarded 2 lbs of high purity
Alumina Powder.

Any fun I can have with it? Anything useful?

Sprinkle some into a flame and see what happens.
Or:
drop some into hot soda water.
Before you start, put on your safety glasses.

I love experimenting.

 

[Steve Roberts]

Buy Calcium Aluminate and make a high temperature cement. Mixed with water and the Alumina, it sets quickly and and is good for up to 1700\'C.

Steve