Currently, I am working on incorporation of heating through electronic sources. I have made a sample that contains 20 guage nichrome wire from Jacobs. The data on the wire is given below:
From this data, I used Mathematica to curve fit to a second order polynomial. The equation for the polynomial is given as: Amps = 7.55359*10^-6*T^2+0.00549092*T+2.47994. An image of the curve fit data is given below:
For the 20 guage nichrome wire, a temperature of 30 deg C can be obtained with the application of 2.65 Amps. The sample with the nichrome wire, as well as, a sample that contains carbon black, and a sample that contains embedded shape memory alloy is seen in the picture below:
Note that the weight percentage of carbon black is too high, and the sample created was a gummy consistency.