| 摘要 |
<p>A thick film, large area resistance heater including a substrate having an electrically non-conductive surface on which is deposited a film electrical resistor such as a thermal sprayed, photo resist etched foil or sol-gel graphite based material. A combination of an electrically conductive film coat backer board substrate composed of the Portland cement, sand, cellulose fibers and other selective additives. A mica substrate heater can be cemented to cement backer board or a vinyl adhesive backing.</p> |
