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Aluminum oxide (sapphire) glassware?
[rquote=646542&tid=156330&author=unionised]The chemical resistance is also good.
But it can ...
18-10-2020 at 03:02
by: metalresearcher
If earth's resources were differently divided?
Gold is being mined from (mostly) underground, then refined and processed and lots of it is stored u ...
18-10-2020 at 01:47
by: metalresearcher
How to seal a threaded stainless steel retort ?
[rquote=646605&tid=156326&author=Fyndium]Carbon powder, mixed with sodium silicate might wor ...
17-10-2020 at 00:17
by: metalresearcher
How to seal a threaded stainless steel retort ?
[rquote=646596&tid=156326&author=njl]Why not seal with teflon tape?[/rquote]
Teflon tape at ...
16-10-2020 at 09:55
by: metalresearcher
How to seal a threaded stainless steel retort ?
I have a stainless steel retort made of threaded 1" pipe with a bottom welded on and a screwable top ...
14-10-2020 at 11:08
by: metalresearcher
How are phosphorus burns treated?
Always use a face shield and leather gloves and a fire retardant workspace.
Prevention is better t ...
14-10-2020 at 05:44
by: metalresearcher
Even HDPE Bottles Aren't Immune to Chemical Attack
[quote]
Yep, the pics just make the page an absolute horror even for larger res monitors. I wonder ...
29-9-2020 at 01:43
by: metalresearcher
Getting a retort. What can I do with it?
The problem with such a retort is that you cannot clean it. The small stopper in it allows only acce ...
28-9-2020 at 01:34
by: metalresearcher
This is mandatory stuff for (amateur) chemists (Safety)
I stumbled upon a parallel channel of NileRed, called NileBlue, of the same guy.

In this 30 min v ...
27-9-2020 at 01:03
by: metalresearcher
My synthetic rubies are somewhat impure, how to make cleaner ?
The idea of making a kind of pellets is very good to prevent the arc blowing away the powder.
But w ...
25-9-2020 at 23:50
by: metalresearcher
My synthetic rubies are somewhat impure, how to make cleaner ?
Here they are, they are about 12mm large.

My carbon rods are pure carbon, no salts inside and no ...
22-9-2020 at 11:17
by: metalresearcher
My synthetic rubies are somewhat impure, how to make cleaner ?
I tried again, but now with a larger pile of Al2O3 / Cr2O3 mixture, preventing the arc reaching the ...
22-9-2020 at 02:19
by: metalresearcher
My synthetic rubies are somewhat impure, how to make cleaner ?
Using a DC welder with two carbon rods, some Al2O3 powder and 1/50 of that amount of green Cr2O3 to ...
19-9-2020 at 10:06
by: metalresearcher
A slightly dangerous but surprisingly effective way to make HCl
What kind of membrane do you use ? Because a membrane is mandatory to prevent the OH- reacting with ...
15-9-2020 at 11:42
by: metalresearcher
Create a carbon free electric arc ?
Thanks for the tip.
I have a (simple disposable) Ar cylinder for other experiments (not used yet fo ...
10-9-2020 at 21:50
by: metalresearcher
Create a carbon free electric arc ?
No, it is purely the vaporizing carbon which is contaminating the steel. But can I just use a tungst ...
10-9-2020 at 12:06
by: metalresearcher
Create a carbon free electric arc ?
I do sometimes (stainless) steel melting with my DC welder and carbon rods. That works well, but, ev ...
10-9-2020 at 10:19
by: metalresearcher
Best place to get glassware in Germany?
I ordered there some glassware.

https://www.neubert-glas.de/

More expensive than AliExpress or ...
2-9-2020 at 11:10
by: metalresearcher
Making Scientific Glassware
[rquote=644015&tid=156103&author=Morgan]A quartz flask method.
https://youtube.com/watch?v= ...
2-9-2020 at 11:07
by: metalresearcher
Chlorate from pool chem?
[rquote=644097&tid=10727&author=phys_geek]gr8 thread everybody.

Is this method good to ma ...
2-9-2020 at 09:04
by: metalresearcher
Dry Glass with Heatgun ?
[rquote=643996&tid=156109&author=Fyndium][rquote=643933&tid=156109&author=Metacelsus ...
1-9-2020 at 09:06
by: metalresearcher
DIY burners and torches
[rquote=643908&tid=156100&author=wg48temp9]Junk_Enginerd@

Yes, I was forced to use a larg ...
31-8-2020 at 22:10
by: metalresearcher
DIY burners and torches
If you don't use it very often, there are oxypropane burner brazing / welding kits for $100, with di ...
31-8-2020 at 02:14
by: metalresearcher
Making H2SO4 from gypsum and silica ?
On wiki I found
https://en.wikipedia.org/wiki/Calcium_sulfate#Other_uses

[quote=wikipedia]
Up ...
23-8-2020 at 22:01
by: metalresearcher
Preparation of elemental phosphorus
I succeeded.

I heated 7g (NaPO3)6 + 3g Al + 2g silica sand in a steel tube retort with a copper t ...
15-7-2020 at 11:30
by: metalresearcher
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