best metal for heatsinks? - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 16th March 2004, 12:35 AM   #1
sardonx is offline sardonx  Canada
diyAudio Member
 
Join Date: Jun 2003
Location: Canada
Default best metal for heatsinks?

I searched but couldn't find anything. Which metal has the best heat conductivity and heat dissapation? I need to build a heatsink. Anyone know?
__________________
The End
  Reply With Quote
Old 16th March 2004, 12:38 AM   #2
diyAudio Member
 
Join Date: Jan 2003
Location: State College
Send a message via AIM to damonpip
Diamond, silver, copper. I cannot find the link that proves this at the minute though.
  Reply With Quote
Old 16th March 2004, 12:44 AM   #3
OliverD is offline OliverD  Germany
diyAudio Member
 
OliverD's Avatar
 
Join Date: Nov 2002
Location: Germany
After copper, the list continues with aluminium.

Cheap, easy to work with, non-magnetic, ... There is a reason why everybody keeps using it
  Reply With Quote
Old 16th March 2004, 12:48 AM   #4
Magura is offline Magura  Denmark
diyAudio Member
 
Magura's Avatar
 
Join Date: Oct 2003
Location: Denmark, Viborg
Quote:
Originally posted by damonpip
Diamond, silver, copper.

A truth with modifications.

For heat conductivity, this is correct.

For dissipation, it is not correct.

An anodized black aluminium surface will have far better dissipation properties than any of the above, for the simple reason that you can dye it black. Any of the other materials you would have to paint black.

Magura
__________________
Everything is possible....to do the impossible just takes a little while longer.
www.class-a-labs.com
  Reply With Quote
Old 16th March 2004, 12:50 AM   #5
sardonx is offline sardonx  Canada
diyAudio Member
 
Join Date: Jun 2003
Location: Canada
that was a quick response.. thank you.

Aluminum is not a problem to get
__________________
The End
  Reply With Quote
Old 16th March 2004, 12:51 AM   #6
diyAudio Member
 
Bill Fitzpatrick's Avatar
 
Join Date: Jun 2001
Location: Eugene, OR
Copper has better conductivity but poorer dissapation than alum.
  Reply With Quote
Old 16th March 2004, 12:53 AM   #7
sardonx is offline sardonx  Canada
diyAudio Member
 
Join Date: Jun 2003
Location: Canada
so ideally the chips should be mounted to a copper bar (of appropriate dimensions) and the fins made out of black anodized aluminum...?
__________________
The End
  Reply With Quote
Old 16th March 2004, 01:15 AM   #8
diyAudio Member
 
breguetphile's Avatar
 
Join Date: Mar 2003
Location: Indiana, USA
It needs to be said that just because one material is greater than another does not mean it is appropriate for the job. The reason aluminum heatsinks are used so frequently is because they are best 99% of the time. While you did ask for best dissipation and heat conductivity, I'd keep in mind cost and ease of use.
__________________
Dawn: When men of reason go to bed. ~Ambrose Bierce
  Reply With Quote
Old 16th March 2004, 01:51 AM   #9
diyAudio Member
 
Sch3mat1c's Avatar
 
Join Date: Jan 2003
Location: Milwaukee, WI
Send a message via ICQ to Sch3mat1c Send a message via AIM to Sch3mat1c
Saphire is also pretty conductive. And it just so happens that's what anodizing produces on the aluminum surface.

I think aluminum is more conductive than copper by density; certainly by cost.

Tim
__________________
Seven Transistor Labs
Projects and Resources
  Reply With Quote
Old 16th March 2004, 01:52 AM   #10
diyAudio Member
 
Bill Fitzpatrick's Avatar
 
Join Date: Jun 2001
Location: Eugene, OR
Quote:
Originally posted by sardonx
so ideally the chips should be mounted to a copper bar (of appropriate dimensions) and the fins made out of black anodized aluminum...?
I'm pretty sure I've seen that done before. Don't forget the thermal resistance between the copper-alum. interface needs to be minimized.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
FS: Metal Case Enclosure, Inductors, heatsinks durwood Swap Meet 1 19th May 2009 02:28 PM
Metal dome should always go with metal cone? Is this a rule? Jay_WJ Multi-Way 5 5th February 2007 07:53 PM
where do you buy your metal?? sts9fan Parts 9 13th October 2006 09:56 PM
ASC metal can polypro caps: ground the metal can to AC ground? jarthel Tubes / Valves 10 6th September 2006 01:54 PM
Metal Oxide vs flamme proof vs metal film ostie01 Parts 28 26th June 2006 07:38 AM


New To Site? Need Help?

All times are GMT. The time now is 03:45 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2