One thing that you should know is that pure metals make better heat conductors than alloyed metals. Working with aluminum, pure aluminum is impractical because it is generally too soft, and certain alloys work better as heat sinks than others.
Alloy 1050 is an excellent heat conductor, as high as 229 W/(m⋅K) but tends to be soft. While trading off a bit of conductivity, stronger alloys such as 6060, 6061 and 6063 can still be effective. They will exhibit thermal conductivity values between 166 and 201 W/(m⋅K). Even the temper of the alloy will affect the amount of heat conducted, so it is important to know exactly how much conductivity you need and check it against the properties of the alloy under consideration.
XTM help advise you on which alloys might work best with your application. XTM aluminum specializes in tile trims, stair nosing, furniture profile, LED profile, partition profile, pipes and tubes.