Talk:List of thermal conductivities
|WikiProject Physics||(Rated List-class, Low-importance)|
The condition of this list has previously been discussed in Talk:Thermal conductivity#Example values for common elements OK?. It got some work done, but I think I need to be more specific:
- The Electrical Conductivity column, which is more acceptable on a page dedicated to this list, has far too many expressions for the same unit.
Some materials have their composition described in the Material column, which makes that column hard to scan -- this information could go in the notes. Some material compositions link to oxides rather than the elements, which suggests something different from what the text itself says.
- The reference superscripts make the table a burden to read, and the way they've been used inconsistently between the conductivity and temperature columns makes them unhelpful.
Also, in an ideal world, the temperature would be specified once, and all materials would be measured at that temperature. Specifying two ranges isn't at all clear, most particularly when the references for the ranges aren't consistent with the references for the conductivities. This problem has stopped me from making a separate Reference column to clarify the table. --ToobMug 13:55, 10 February 2007 (UTC)
Regarding the reference superscripts: Perhaps they should be moved to the end of the numbers, e.g. 12345g instead of g12345. The table does not sort properly if they are written with preceding superscripts. I will make this change and if I am violating some wikipedia rule, please let me know here and revert it. 220.127.116.11 (talk) 18:49, 7 February 2008 (UTC)
Request for data
First, a vacuum should be included for reference.
As far as I know, vacuum does not conduct heat, although it can transfer it by radiation. Platinum should be added for its use in temperature measurements. YBCO would be a nice (but challanging) addition. —Preceding unsigned comment added by 18.104.22.168 (talk) 01:38, 18 July 2010 (UTC)
- Heat transfer through the vacuum does not conform to Fourier's law. For most materials, energy flux between two planes is proportional to cross section and inversely proportional to the distance between the plates (hence the thermal conductivity coefficient has m^-1 in the dimensionality). The flux between two close parallel planes in the vacuum is not related to the distance between them (to the first order). Instead it is governed by Stefan-Boltzmann law, . At room temperature, , where c = 5.7 W/(m^2 K). --Itinerant1 (talk) 22:05, 4 August 2012 (UTC)
Some of the temperatures cited in the properties table are negative(in kelvin), that has to be a mistake clearly. someone should take a look at it. — Preceding unsigned comment added by 22.214.171.124 (talk) 16:32, 30 August 2013 (UTC)
Thermal Conductivity Common Liquids
Common fluids and their thermal conductivity
Thermal Conductivity of some common liquids at a temperature of 300 K Fluid Thermal Conductivity (W/m K) Acetic acid 0.193 Acetone 0.180 Alcohol, ethyl (ethanol) 0.171 Alcohol, methyl (methanol) 0.202 Alcohol, propyl 0.161 Ammonia, saturated 0.507 Aniline 0.172 Benzene 0.167 n-Butyl alcohol 0.167 Carbon Disulfide 0.161 Carbon Tetrachloride 0.104 Castor Oil 0.180 Chloroform 0.129 Decane 0.147 Dodecane 0.140 Engine Oil, unused 0.145 Ether 0.130 Ethyl acetate 0.137 Ethylene Glycol 0.258 Freon refrigerant R-11 0.093 Freon refrigerant R-12 0.071 Glycerine 0.285 n-Heptane 0.140 Hexane 0.124 Isobutyl alcohol 0.134 Kerosene 0.145 Methyl alcohol 0.212 n-Octane 0.147 n-Pentane 0.136 Phenol 0.190 Propylene glycol 0.147 Transformer oil 0.110 Toluene 0.151 Turpentine 0.128 Water, Fresh 0.609
Problem with the ordering
There seems to be some problem when ordering by Thermal conductivity. When trying to order from least to most conductor the Polyethylene foam goes nearly the end of the list where it should be at the start. I have tried formating the values differently but it doesn't seem to have helped. —Preceding unsigned comment added by 126.96.36.199 (talk) 12:06, 21 October 2010 (UTC)
Clean up idea
Reference no. 7 just links to Hukseflux sensors. I assume Hukseflux once published a table containing thermal conductivity values of different materials. This information is no longer accessible and the link to Hukseflux looks more like product advertisement. — Preceding unsigned comment added by 188.8.131.52 (talk) 16:02, 1 December 2014 (UTC)