Ceramic Heat Sinks

Just pulled a bunch of ceramic heat sinks off a large load of Cisco server boards. Not much info on ebay that I could find, and wondering what you guys have done with these things? May not be worth a penny but this is the place to find out

ceramic heat sinks, or, ceramic processors? Ceramic heat sinks, I was waiting on a picture ; ) Ceramic processors, shouldn't they be worth same as other ceramic processors?

ahhh, pinless

Those look like DLP chips. Ha!

Or is it DPL...gah! Always confuses me!

Sirscrapalot - Move on, nothing to see here. I swear officer!

HEAT SINKS.... sorry for not having a picture handy, plus its still a bit tedious to post pictures on the forum. It looks just like any other type of heat sink, about 2" square, but its made from ceramics.

Here is a ebay listing for the same card I took the heat sinks off of. There is a blue one and a couple black ones. The largest is aluminum, as well as the silver one, but the rest are ceramic. I have about 60-100 of the ceramic types

Cisco GE GBIC SC B Series Router Gigabit Ethernet Line Card for 12000 Series | eBay

Originally Posted by Bear

I found imgbox.com works well enough for me. A simple(although not necessarily required) sign up will also send all your uploads to your own album there. I haven't loaded photos much lately, and haven't tried the SMF uploads, but anything gotta be better than ebay auctiva haha ; )

I'm used to ebay now, although posting pics anywhere seems to be a pain these days. I just don't like that we cant do a simple download from our computer. Now I have to send from camera to computer, from computer to 3rd party site, then from there to final destination. Sadly for me it typically doesn't even work after that, so I gave up on it. Easier to copy/paste a link to a similar item on ebay.

You can now upload pictures to the forum. It's pretty easy, and it automatically adjusts the image to a small filesize, so you don't have to do any editing on your side.

Correct me if I am wrong but I have never heard of a ceramic heat sink. Ceramic is used as an electrical insulator and it is my understanding that if it is a good electrical insulator it is also a heat insulator. I do know that the better a material conducts electricity the better it conducts heat. So why use ceramic for a heat sink?
Chris

Originally Posted by shendog

I'm used to ebay now, although posting pics anywhere seems to be a pain these days. I just don't like that we cant do a simple download from our computer. Now I have to send from camera to computer, from computer to 3rd party site, then from there to final destination. Sadly for me it typically doesn't even work after that, so I gave up on it. Easier to copy/paste a link to a similar item on ebay.

I wasn't referring to you posting them, but me viewing them, haha. Camera to computer to 3rd party host to posting? I do that too, you should try it sometime on dial-up ; ) The link you gave was to a listing which used one ebay pic(which didn't include the heatsink shots) and its other photos were imbedded links from auctiva which I simply couldn't open here.
Still wondering what a ceramic heatsink looks like : D

Originally Posted by shendog

I'll have to look at them closer. At first I thought it was a typical aluminum heat sink with a powder coating on it, but it has the recognizable "clink" sound you would find with a ceramic product. I agree with you on the use and heat conductivity, so I am at a loss why they would use ceramics. I will take a blade to one and break it open just to see if it is in fact aluminum with a coating, but then why put on a coating? My curiosity is clearly piqued at this point! And I will also try to post a photo or two....again

btw immulman: is that DQ still there on RT 302 in Windham? I remember summers going there many moons ago

edit: OK....just put one half in a vise and took pliers and snapped it in half with barely any effort. I took a loupe and examined it and it sort of looks like cast aluminum, but hard to tell. If it is, then there is some type of powder coating on it as well.

Yes the DQ is still there plus a lot of other stores. Do you remember the giant walking service man? [He is still there but does not walk any more] Or the house on the water in Sebago lake? [It was on a pile of rocks, not even an Island, it is not there , got torn down]