MgB2

Conundrum, Thu May 08 2014, 04:53AM

Hi all.
As part of my ongoing research I need to make this from scratch.

So far I've determined that boron mixed with magnesium would probably work if "fired" in a domestic microwave but is there a safer method please?

Ideally the shape change should be minimal as I need to stack Y263 and MgB2 disks.
Thanks!
A
Re: MgB2
ohnos, Tue May 27 2014, 05:45AM


Mg + B2
Adiabatic reaction temp: 1706K
Heat of reaction: 479cal/g

ref: 24th int.pyro.sem 1998

Ive tried TiB but couldnt get a reaction and its supposedly much more energetic, you'd need an inert atmosphere regardless.
Re: MgB2
Conundrum, Fri May 30 2014, 07:51PM

Thanks!


EDIT: Got Mg, would argon (cheap, £30 or so per cylinder) do?

I'd need to use a microwave and inert glass frit to seal the tube then pump it down and encase in a susceptor such as silicon carbide powder, in a fire cement casing with some sort of thermal feedback.

EDIT: Best to use a proper crucible, tried it with ZnGaS (Zn+GaO+S) and it broke spectacularly.


-A