<div dir="ltr">If C is a concern, you may consider SiC.<div>I have no experience with that, but you could research that type.</div><div>BR,</div><div>Ted Wangensteen</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Aug 18, 2022 at 7:19 PM Michael Yakimov <<a href="mailto:yakimom@sunypoly.edu">yakimom@sunypoly.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">From the general perspective...<br>
<br>
La is an active metal, it slowly oxidizes in the air. It is very feasible that it may react with carbon and form carbide, if melted in carbon crucible. So the way I read that crucible selection is "do not use carbon! Use something else". Yellow layer of Aluminum Carboide can become a problem with carbon crucible as well, so at least this is a feasible assumption. <br>
As an active metal, again, it will wet most other crucibles - I don't think that can be avoided. Density of Liquid La is somewhat below solid, but not too much - so I suspect it may be breaking crucibles like Al, so beware of ceramic ones. Otherwise, I would be looking at crucible price - those materials must be steep. <br>
<br>
If you have to justify the use of metal in evaporator, compare La with Al. It seem to be on the same page from e-beam deposition perspective. <br>
<br>
Thanks<br>
<br>
mike<br>
<br>
<br>
<br>
<br>
<br>
<br>
-----Original Message-----<br>
From: labnetwork <<a href="mailto:labnetwork-bounces@mtl.mit.edu" target="_blank">labnetwork-bounces@mtl.mit.edu</a>> On Behalf Of dbouillez <a href="http://plasmaprocessgroup.com" rel="noreferrer" target="_blank">plasmaprocessgroup.com</a><br>
Sent: Wednesday, August 17, 2022 17:26<br>
To: Alexey Kovalev <<a href="mailto:kovalev@magnet.fsu.edu" target="_blank">kovalev@magnet.fsu.edu</a>>; <a href="mailto:labnetwork@mtl.mit.edu" target="_blank">labnetwork@mtl.mit.edu</a><br>
Subject: Re: [labnetwork] Lantanum evaporation<br>
<br>
Hello Alexey,<br>
<br>
I have several questions if you don't mind me asking:<br>
<br>
What gas environment do you intend to use for evaporation? <br>
What is the end product you are looking to produce with the use of this material? <br>
Are you looking for liners that allow for best adhesion of over spray? Or, looking at concerns with contamination from secondary deposition?<br>
<br>
I can't say that I have a background on this material, but I would be interested in knowing the use for this material if it can be disclosed.<br>
<br>
Thanks,<br>
<br>
Dan<br>
<br>
Dan Bouillez<br>
Plasma Process Group<br>
Sales<br>
<a href="mailto:dbouillez@plasmaprocessgroup.com" target="_blank">dbouillez@plasmaprocessgroup.com</a><br>
PH 970-663-6988 <br>
Cell 970-415-7259<br>
PPG business hours Mon-Thurs 7 am to 5:30pm Mountain time<br>
<br>
-----Original Message-----<br>
From: labnetwork <<a href="mailto:labnetwork-bounces@mtl.mit.edu" target="_blank">labnetwork-bounces@mtl.mit.edu</a>> On Behalf Of Alexey Kovalev<br>
Sent: Wednesday, August 17, 2022 9:34 AM<br>
To: <a href="mailto:labnetwork@mtl.mit.edu" target="_blank">labnetwork@mtl.mit.edu</a><br>
Subject: [labnetwork] Lantanum evaporation<br>
<br>
Hello All,<br>
We are thinking about e-beam evaporation of Lanthanum.Kurt Lesker recommends either tungsten or tantalum liner and I am wondering what could be the difference in this case. I also found out that Thermionics thinks that alumina liner will work as well.<br>
Could anybody please give a comment, either on evaporation of the lantanum, or on the liner material?<br>
Thank you very much<br>
Alexey<br>
<br>
-- <br>
Alexey Kovalev <br>
Assistant in Research<br>
A302<br>
NHMFL FSU<br>
1800 E. Paul Dirac Dr.<br>
Tallahassee , FL 32310-3706 <br>
<a href="mailto:kovalev@magnet.fsu.edu" target="_blank">kovalev@magnet.fsu.edu</a><br>
TEL:850-644-0861<br>
FAX:850-644-5038<br>
<br>
5161 706C 6127 <br>
<br>
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</blockquote></div>