[labnetwork] Aluminimum source crucible suggestions

[Felix Lu]

HI Cliff,

    I had the same problem a few years ago using the evaporator at UNC Chapel Hill. We were using a graphite crucible and the aluminum would creep up the side and I think the surface tension of the metal would break the crucible as it cooled - after a few cycles. I talked the guys over at Kamis (NY) and I don’t recall the crucible liner we bought from them now (some boron alloy in conjunction with graphite spacers?) but it worked (haven’t heard of a break). I would talk to them if you haven’t done so already.

Best,

Felix

On May 31, 2016, at 12:11 PM, Clifford F Knollenberg <cknollen at stanford.edu<mailto:cknollen at stanford.edu>> wrote:


Hi All,


We've been having crucible cracking issues with out Al e-beam evaporation source.  In short it cracks its crucible after just a few uses.  This wasn't so bad when it happened ever 4-5 months, but not its happening about every week or two.  I've tried a variety of crucibles, had the most luck with carbon crucible.  Is there anything else out there we should be trying?


Cheers,


Cliff


Clifford Knollenberg

Science & Engineering Associate

Stanford Nano Shared Facilities (SNSF)

Email: cknollen at stanford.edu<mailto:cknollen at stanford.edu>

Tel: 650-723-1675

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