The invention relates to a heating unit of an
infrared electric
hot plate and a preparation method thereof. The
infrared electric
hot plate is made up of conductive material
ranging from 1 percent to 30 percent, heat conduction material
ranging from 30 percent to 92 percent,
polymer adhesive ranging from 5 percent to 50 percent and toughener ranging from 2 percent to 10 percent.The preparation method is as followings: the front part of the heating unit is made through thermofixation or
hot press molding, then under the protection of
nitrogen or
inert gas, the front part is carbonized for 3 to 12 hours at a high temperature ranging from 900 DEG C to 2200 DEGC, thus obtaining the heating unit of an
infrared electric
hot plate. The preparation is simple with low cost.The infrared electric hot plate, using 6-380V alternating or direct currents, can directly produce infrared
radiation with high efficiency of energy conversion. Being a heating unit, the infrared electric hot plate can produce infrared
radiation both on the upper surface and the lower surface dispensing with a substrate, which greatly increases
radiation area and improves
heating efficiency. As a novel infrared heating unit material, the invention not only can be extensively applied to technics such as heating, baking and heat treatment in
agriculture and industry, but also can be applied to
medical care and heating in winter, etc., with important application value and extensive application prospect.