[labnetwork] Lithium evaporation

[Gheorghe Iordache]

Dear Rick,
This material deposition chart is a good source of information:  https://www.lesker.com/newweb/deposition_materials/materialdepositionchart.cfm?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 ! :))

Kind regards,
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Gheorghe IORDACHE, PhD Physics, MBA
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From: 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>; 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
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