Nixie and Magura do Heatsink Material

[maxro]

I was just saying that beryllia would be strong enough for a heatsink, not a bicycle. Cosidering the fact that beryllium oxide heatsinks are commercially available, I don't think I'm stretching. How strong does your Hi-Fi need to be? A tube amp wouldn't take well to a hammer blow either.

Now, in an attept to get back on the topic of frypans; CAST IRON RULES!

ps. I know a lot more about bicycles than heat sinks or fry pans.

 

[Nixie]

Just admit you are wrong. You cannot have fins made of beryllia because they'll break very easily.

 

[SY]

That just means that a different geometry might be optimum.

It would be interesting to use BeO in a block for liquid cooling. It would be even more interesting to use single-crystal tetrahedral carbon, the best thermal conductor.

 

[kelticwizard]

It would be even more interesting to use single-crystal tetrahedral carbon, the best thermal conductor.

Isn't that diamond?

I hear next week they're going to start selling cubit zirconium heatsinks on the Home Shopping Network.

 

[SY]

Until they make them out of tanzanite, my wife isn't interested.

 

[Pjotr]

Until they make them out of tanzanite, my wife isn't interested.

I guess, you meant Tarzan-nite

I wonder, what advantage does BeO have for a heat sink anyway?

 

[EC8010]

I wonder, what advantage does BeO have for a heat sink anyway?

It could have a number of devices with collectors at different voltages and leave the heatsink exposed. Hate to think how much it would cost (although cheaper than the exotic forms of carbon).

 

[Magura]

It could have a number of devices with collectors at different voltages and leave the heatsink exposed. Hate to think how much it would cost (although cheaper than the exotic forms of carbon).

Hmm, I've been playing with carbon heatspreaders. The carbon stuff is conductive, but it has the advantage of being directional and offering heat transfer close to what offered by copper. The carbon stuff is though mostly used to save weight in aircrafts and the like.

Nice material though. I got a few big pieces sent my way (as in like 80 or 90 kilograms) so I've used it as partly heat transfer, partly a design element for my next amp. (see link in www button)

Magura

 

[Nixie]

There's no cheap way to synthesize it. I'm wondering about the amorphous tetrahedral carbon, however. Anyone have heat conductivity data on it?

 

[Magura]

Well, AFAIK the reason that stuff is so darn expensive is not the price of the carbon itself, but that the manufacturing of the final product takes (correct me if I'm wrong) like 8 month at high temp and under constant infusion of carbon from a type of gas (can't remember which one). Hence the steep price tag

Magura

 

[Nixie]

I hear next week they're going to start selling cubit zirconium

Not a single-crystal version, but I have a zirconia knife. The surface is black from the graphite blocks of the HIP process. I get free sharpening for life, though after four years, there's no noticeable loss of sharpness, just a tiny bit of chipping in some edges from the time I tried to cut bones.

 

[Nixie]

but that the manufacturing of the final product takes (correct me if I'm wrong) like 8 month at high temp and under constant infusion of carbon from a type of gas (can't remember which one).

That's just one of the processes; there are multiple routes to large synthetic diamonds. The prices of really good synthetic diamonds exceed that of the lowest quailty natural ones, and even more so for the high-end synthetic rubies and sapphires. Don't know about emeralds.

 

[Magura]

That's just one of the processes; there are multiple routes to large synthetic diamonds. The prices of really good synthetic diamonds exceed that of the lowest quailty natural ones, and even more so for the high-end synthetic rubies and sapphires. Don't know about emeralds.

Hmm, I didn't know there were several ways to shave that goat. Anyway the stuff I have is made with the gas infusion process. I believe it's around 3.000 usd per kilogram. Far from the price of synthetic diamond, or I would be very rich now LOL

Magura

 

[Nixie]

LOL, I just wasn't reading all the posts. I thought you were talking about diamonds.

 

[maxro]

Well, I guess this thread has shown that Teflon is good for keeping us from sticking to the original topic.

 

[Magura]

LOL, I just wasn't reading all the posts. I thought you were talking about diamonds.

Nope, no diamonds, but I do have like 80 kg of that gas infused carbon stuff. It works quite well as heatspreader

Magura

 

[Nixie]

If the carbon is infused with gas, wouldn't the gas act as an insulator? I don't know of any gas that is an excellent heat conductor.

 

[Magura]

No it's infused with carbon from a gas that lets go of the carbon, so the carbon material is really just pure C and thats it. It's a quite good electrical conductor.

Take a look at my www link, there you can see some of it here and there

Magura

 

[Nixie]

Are you talking about CVD?

 

[Magura]

Are you talking about CVD?

CVD , now what's that???

Magura