What is the material with the largest thermal expansion?
I've looked many places online, but none seem to give me the Solid with the largest thermal expansion. It shouldn't be too expensive or hard to come by and it would be great if it could be purchased pre-cut into a square or at least could be cut by hand. This is very important for my upcoming project that I would love to share with you! Thank you so very much!
PS: in the length of 6cm and a temperature difference of 41 degrees Celsius (or Kelvin) this material needs to expand by at least 2mm