<berndj> can one make multiple passes with one roll of wire, or do you use it only once?
<azonenberg> wire saw? i think its a loop
<azonenberg> runs on a belt between two pulleys
<azonenberg> and you use it until it snaps
<azonenberg_work> No, i canot afford it :p
<B0101> I cannot afford that either
<B0101> even if i could... i know that my home lab may not have enough space to put that thing
<B0101> azonenberg_work: do you know anything about Quantum mechanics?
<lekernel> "at a affordable price"? oh well...
<azonenberg_work> lekernel: lol
<lekernel> checking out state auctions might be interesting for such equipment. I nearly bought a 300-ish MHz NMR last year for 200E.
<lekernel> I would have needed liquid helium to get it to work, though. I wonder why they didn't use high temperature superconducting magnets; the field isn't _so_ high ...
<azonenberg_work> Yeah, i heard about that lol
<berndj> lekernel, afaik they prefer "standard" superconductors because they have a higher and hence more useful critical B field
<berndj> also, running a high temp superconductor at said high temp doesn't leave any room for B field; so you cool it some below Tc so that it can be a *magnet*
<berndj> i think as far as superconductors are concerned, 1T is plenty high!
<bart416> azonenberg_work, please note this:
<bart416> SKJ-50CZ is a high quality CZ crystal growth furnace for material research laboratories at a affordable price.
<bart416> Sale Price: USD$119,995.00
<bart416> mhhh...
<azonenberg_work> lol
<bart416> also, it's an affordable price
<bart416> Demand a discount of 99.9999999% for spotting that error!
<mrdata> what can you build a furnace for, these days?
<mrdata> let's start with 18th century fire brick
<bart416> mrdata, that'll do horrible as a crystal growing furnace though
<mrdata> how hard is it to make copper wire from a billet?
<bart416> You need a clean chamber
<mrdata> bart416, what is needed to bring it up to spec?
<mrdata> clean how?
<bart416> High carbon steel alloys
<mrdata> let's say i have unlimited quantities of chalk
<bart416> You need a metal alloy that won't disperse material into the furnace
<mrdata> why not ceramic?
<bart416> Holds its structural integrity
<bart416> Does not contain a crystal seed of any sorts!
<mrdata> oooooh
<bart416> And by all means, no silicium in it, at all
<mrdata> CaO has no Si in it... oh, unless it's random linestone maybe
<mrdata> *limestone
<mrdata> how about a metallic coating on the chamber, then?
<bart416> You don't get it, you need to use a metal alloy for this
<bart416> CaO will thermally disband and create oxides
<mrdata> so, the preferred material is high carbon steel?
<mrdata> stainless?
<mrdata> say, chrome vanadium?
<mrdata> or,...
<bart416> I'd have to look what the preferred material is
<bart416> But high carbon steel has a high enough melting point I think
<bart416> You wouldn't want to use titanium
<bart416> Too dangerous
<azonenberg_work> dangerous how
<mrdata> yeah, why the prejudice against titanium?
<mrdata> is it very reactive at high temperature?
<azonenberg_work> What about tungsten? :P
<mrdata> i like tungsten
<mrdata> but, it also oxidizes?
<mrdata> hafnium tantalum carbide?
<mrdata> if we're getting exotic
<azonenberg_work> lol
<mrdata> it resists high temperatures, but maybe it needs a coating
<bart416> titanium can catch fire at higher temperatures mrdata
<mrdata> ah
<mrdata> how deep a coating will do?
<mrdata> a few nm?
<mrdata> and, coating with what?
<bart416> Maybe Titanium Carbide would work
<bart416> Metls at +3000°C
<mrdata> i am interested to know about refractory materials to use at extremely high temperatures
<mrdata> 10,000 K and above
<bart416> That's a highly specialised field mrdata
<mrdata> anyone here know the composition of Starlite?
<mrdata> with a Starlite nosecone, you could launch objects from cannons at sea level and give them escape velocity
<mrdata> they might make good crucibles, too
<bart416> Starlite's formula is unknown
<mrdata> time for someone to really lean on its inventor
<bart416> They didn't even patent it I think
<bart416> Out of fear of people replicating it from the patent data
<mrdata> the inventor put all this effort into making it, and for what? it hasnt been deployed
<mrdata> he's way too paranoid about it
<azonenberg_work> what is it?
<azonenberg_work> some kind of ceramic?
<mrdata> starlite is a composite material that resists 12,000 degree temperature
<azonenberg_work> o_O
<azonenberg_work> and is it being used for anything now?
<mrdata> you can find videos of flame tests on youtube
<mrdata> intended for deployment on rockets, but the market may not be ready for it
<azonenberg_work> no, i mean is it actually being used commercially
<azonenberg_work> and if not, why
<mrdata> no
<mrdata> not deployed, because the inventor is crazy paranoid
<azonenberg_work> coca-cola's formula is top secret
<azonenberg_work> but they still sell it
<mrdata> wont sell it; wont let samples out of his sight
<azonenberg_work> oh, so crazy paranoid
<mrdata> yes!
<azonenberg_work> rather than pragmatically paranoid
<mrdata> nutbar
<azonenberg_work> So nobody even knows if it works as well as he claims it does?
<mrdata> it's been tested
<azonenberg_work> By reliable third-party labs?
<mrdata> video of flame tests show it protecting an egg from being cooked
<mrdata> youtube
<azonenberg_work> So it's actually an insulator?
<mrdata> yep
<azonenberg_work> As opposed to maintaining structural integrity while transmitting heat
<azonenberg_work> for example, tungsten (at lower temperatures)
<azonenberg_work> which is a metal and thus thermally conductive
<azonenberg_work> but doesnt melt
<mrdata> we need both kinds of materials, sure
<mrdata> i want a flexible, non-radar reflective insulator that can stand 3500 degree temperatures
<mrdata> (for some mach-24 flight tests)
<bart416> radar reflection depends more on shape than material in many ways
<mrdata> ok. the point is, it has to do mach 24 to mach 30, through upper atmosphere, from london to sydney