[labnetwork] Lithium evaporation

Thu Sep 19 15:19:54 EDT 2019

Hi all, 

I agree with Gheorghe. Lithium can contaminate your system and can also
interfere with other processes if it's a multi-user evaporator. It reacts
with water and with Nitrogen (that's why it's normally used in a glove box
with Ar). 

Just be careful.

Thanks,

Nava

Nava Ariel-Sternberg, Ph.D.

Director of CNI Shared Labs

CEPSR/MC 8903 

530 west 120th st. NY

NY 10027

Office: 212-8549927

Cell: 201-5627600

From: labnetwork-bounces at mtl.mit.edu <labnetwork-bounces at mtl.mit.edu> On
Behalf Of Gheorghe Iordache
Sent: Tuesday, September 17, 2019 10:31 AM
To: Morrison, Richard H., Jr <rmorrison at draper.com>; labnetwork at mtl.mit.edu
Subject: Re: [labnetwork] Lithium evaporation

Dear Rick,

This material deposition chart is a good source of information:
https://www.lesker.com/newweb/deposition_materials/materialdepositionchart.c
fm?pgid=0 

Lithium may contaminate your vacuum system and special precautions shall be
taken for exhaust and/or decontamination. It shall be avoided the contact
with water or humid air as they react violently with Lithium dust (see for
example page. 9-62 of Laser Program Annual Report, Volume 3, 1980 ! J)

Kind regards,

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Director of the Nanofabrication Core Lab 

KAUST

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From: labnetwork-bounces at mtl.mit.edu <mailto:labnetwork-bounces at mtl.mit.edu>
[mailto:labnetwork-bounces at mtl.mit.edu] On Behalf Of Morrison, Richard H.,
Jr
Sent: 17 September 2019 12:33
To: Clark O.D. <odc1n08 at soton.ac.uk <mailto:odc1n08 at soton.ac.uk> >;
labnetwork at mtl.mit.edu <mailto:labnetwork at mtl.mit.edu> 
Subject: Re: [labnetwork] Lithium evaporation

Thanks Clark excellent information.

Rick

From: Clark O.D. [mailto:odc1n08 at soton.ac.uk] 
Sent: Tuesday, September 17, 2019 3:43 AM
To: Morrison, Richard H., Jr <rmorrison at draper.com
<mailto:rmorrison at draper.com> >; labnetwork at mtl.mit.edu
<mailto:labnetwork at mtl.mit.edu> 
Subject: RE: Lithium evaporation

Can be done and evaporates fairly reliably. It takes very little power to
melt. For us it helped to keep the walls of the crucible cold to stop it
creeping up the sides and out onto the hearth. Can't remember what crucible
we used but a TiN coating is probably not a bad idea to try and stop Li
interdiffusion. There is various literature which discusses it being an
effective barrier to Li. Pyrolytic Boron Nitride is another good
alternative. 

It also evaporates well from a k-cell at ~500C but eventually it will creep
around the end of your crucible and attack heating filaments if you run it
too long. PBN crucibles again.

From: labnetwork-bounces at mtl.mit.edu <mailto:labnetwork-bounces at mtl.mit.edu>
<labnetwork-bounces at mtl.mit.edu <mailto:labnetwork-bounces at mtl.mit.edu> > On
Behalf Of Morrison, Richard H., Jr
Sent: 13 September 2019 16:55
To: labnetwork at mtl.mit.edu <mailto:labnetwork at mtl.mit.edu> 
Subject: [labnetwork] Lithium evaporation

Hi Folks,

Has anybody allowed Lithium into an E-Beam evaporator, if so any tips?

Thanks

Rick

Richard H. Morrison

Principal Member of the Technical Staff

Draper

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Cambridge, MA

02139-3573

Work  617-258-3420

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www.draper.com <http://www.draper.com> 

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