I skimmed through it, one thing that struck me was that they hit 1372°C for 10 minutes. I have serious doubts that their stainless steel vessel could have survived such a temperature (barely bellow melting) - which makes me suspicious of an error somewhere, this is above where k-type thermocouples would typically be expected to be accurate or reliable. Also melting point depression would have melted nickel powder at such temps destroying (what I thought was important) nickel surface morphology.
They seem to have good resources so hoping they do better calorimetry in future. On 31 May 2015 at 04:19, Bob Higgins <rj.bob.higg...@gmail.com> wrote: > Type B thermocouples are expensive; even for fine wire, short, uninsulated > couples, because they are made from platinum. They may be 10x more > expensive than type-K and extension wires are just as expensive. > Additionally the signal level is smaller with type-B which means more noise > in the measurement. > > > On Sat, May 30, 2015 at 11:41 AM, Jed Rothwell <jedrothw...@gmail.com> > wrote: > >> a.ashfield <a.ashfi...@verizon.net> wrote: >> >> Beats me why they don't use type S or type B thermocouples that are >>> common in the glass industry. >>> >> >> That probably would be better. You should suggest it to Jiang. (His >> e-mail in the slides. He is a good guy.) >> >> The K-type thermocouple maxed out. >> >> They have to replace the inner thermocouple (T3) in any case. >> >> - Jed >> >> >
