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Originally Posted by jaydee
That is looking good. I am planning a similar version and was also going to use lexan being it is all I have other than wood.
Are you still going to use the resistor for the heater?
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Yes I am Jaydee, the
Arcol 2.2ohm 200W.
The material needs to be fairly strong, I don't think expanded foams would cut it. I have considered wood, oak would not be totally unsuitable in my opinion, it's thermal properties are rather good considering but I worry about fire and water.
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Originally Posted by Cather
"High Temperature Insulator Sheets"
"Asbestos Free Glass Reinforced Polymer Composite"
...
Thermal Conductivity: 1.9 BTU/hr/ft2/in-F @ 75F, and 2.1 @ 225F
550F maximum working temp.
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So 287°C Max temp and 0.274W/m*°C
Lexan starts softening about 160-170°C has thermal conductivity of 0.21W/m*°C. Mechanically this sounds interesting Cather. One disadvantage is that materials containing glass tend to wear tools out, but thats not a huge deal. If I can find some of this I'll probably use it. Until then I'm going with Lexan.