Question on cooling power of metals...

[TOMATOMAN]

Where can i get info in the heat transfer rate of things? Just wondering whats better than copper. Im guessing Silver, gold, maybe platnium? Well i know silver and gold just wondering what better than that :}

[Silversinksam]

Thermal Properties of Materials
Thermal Conductivity, W/cm-K
Metals

Aluminum 2.165
Beryllium 1.772
Beryllium-copper 1.063
Brass 70% copper, 30% zinc 1.220
Copper 3.937
Gold 2.913
Iron .669
Lead .343
Magnesium 1.575
Molybdenum 1.299
Monel .197
Nickel .906
Platinum .734
Silver 4.173
Stainless Steel-321 .146
Stainless Steel-410 .240
Steel, low carbon .669
Tin .630
Titanium .157
Tungsten 1.969
Zinc 1.024

Semiconductors

GaAs .591
Silicon (pure) 1.457
Silicon (.0025 ohm-cm) .984
Silicon Dioxide (amorphous) .014
Silicon Dioxide (quartz) c-axis .11
Silicon Dioxide (quartz) a-axis .059
Silicon Nitride .16 - .33
Silicon Carbide .90

Insulators

Air (still) .0003
Sapphire c-axis .35
Sapphire a-axis .32
Alumina .276
Alumina 85% .118
Beryllia 99.5% 1.969
Beryllia 97% 1.575
Beryllia 95% 1.161
Boron Nitride (hot pressed) .394
Diamond (room temperature) 6.299
Diamond (77 K) 24.
Diamond (room temperature, isotopically pure) 50.
Epoxy .002
Thermally conductive epoxy .008
Glass .008
Heat sink compound (metal oxide loaded grease) .004
Mica .007
Mylar .002
Phenolic .002
Silicone Grease .002
Silicone Rubber .002
Teflon .002
FR-4 or G-10 PC board material .003
water .0055
Liquid Helium (4.2K) .000307
Liquid Nitrogen (77K) .001411
Liquid Argon (85K) .001258
Thermally Conductive Elastomers
Bergquist Sil-pads .009
Tecknit Consil-C 871 .023
Tecknit Consil-R 350 .00433 to .00732
Saracon 2.9e-3 cal/cm-sec-K
Chomerics XTS-274 alumina filled elastomer .002 cal/sec cm K
Cho-seal 1224 .038
Cho-therm .0433
Cho-therm 1678 .018
Cho-therm 1671 .027

Click here for a Periodic interactive Table of Elements (http://www.webelements.com/webelements/elements/text/periodic-table/heat.html)

[TOMATOMAN]

So any one want to make a diamond water block see what temps we get?? :}

[train22]

Originally posted by Silversinksam
Thermal Properties of Materials
Thermal Conductivity, W/cm-K
Metals

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Click here for a Periodic interactive Table of Elements (http://www.webelements.com/webelements/elements/text/periodic-table/heat.html)

Actaully some of these are off, for example gold is more conductive than copper, here's the correct chart in order:

Material__________Conductivity k W/mK
Silver...........................420,000
Gold............................310,000
Copper........................300,000
Aluminum....................150,000
Brass..........................150,000
Platinum.......................69,000
Iron, cast......................65,000
Zinc...............................64,000
Iron, wrought...............58,000
Nickel............................58,000
Steel, soft.....................46,000
Lead.............................35,000
Mercury...........................7,000
----------------------------------
Water.............................0.600
Air...................................0.026

Hope this helps, for a heatsink Coppoer is best, Gold and Silver are obviosuly better but much more expensive for a tiny bit in difference of temps. Aluminum is lighter but less conductive.

Cheers

[ptcg]

I don't know where you guys come up with this info.. Gold is a better electrical conductor, but not as good at heat conductivity as copper...

Here's (http://www.overclockers.com/tips188/) a good link that shows everything you need to know..

Silver is best, Copper is second, Gold is third..

[JigPu]

Do I sense a debate??? Oh well, all I know is that I'm not going to spend more money for a gold heatsink when silver will do better, and definatly won't spend the money for a silver heat sink 'cuz copper is close, and is MUCH cheaper...

Oh yeah... you forgot to put that special type of diamond in your table....
JigPu