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<p class="MsoNormal" style="background:white"><span style="color:#212121">Are there commercially available SiC crucibles for e-beam? Never heard of those, and nothing at my usual suspects (Kamis, Lesker, Thermionics) nor on the first page of Google.
<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="color:#212121">And there is certainly carbide formation in Al+SiC system at temperatures used for evaporation.
<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="color:black">Iseki, T., Kameda, T. & Maruyama, T. Interfacial reactions between SiC and aluminium during joining.
<i>J Mater Sci</i> <b>19</b>, 1692–1698 (1984). <a href="https://doi.org/10.1007/BF00563067">
https://doi.org/10.1007/BF00563067</a></span><span style="color:#212121"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="color:black">From:</span></b><span style="color:black"> Ted Wangensteen <twangens@mail.usf.edu><br>
<b>Sent:</b> Friday, August 19, 2022 9:09:28 AM<br>
<b>To:</b> Michael Yakimov <yakimom@sunypoly.edu><br>
<b>Cc:</b> Alexey Kovalev <kovalev@magnet.fsu.edu>; labnetwork@mtl.mit.edu <labnetwork@mtl.mit.edu><br>
<b>Subject:</b> Re: [labnetwork] Lantanum evaporation</span> <o:p></o:p></p>
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<p class="MsoNormal">If C is a concern, you may consider SiC. <o:p></o:p></p>
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<p class="MsoNormal">I have no experience with that, but you could research that type.<o:p></o:p></p>
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<p class="MsoNormal">BR,<o:p></o:p></p>
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<p class="MsoNormal">Ted Wangensteen<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Thu, Aug 18, 2022 at 7:19 PM Michael Yakimov <<a href="mailto:yakimom@sunypoly.edu">yakimom@sunypoly.edu</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">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" 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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