Abstract: Baking household appliances with Nickel-chromium alloy heating tube have slow heating speed and mediocre baking effect. Graphite can solve these problems from the heat source itself with fast heating rate and short wavelength. Firstly, the graphite sheet with thickness of 170 μm~200 μm was obtained by controlling the calendering process. Then, graphite resistors from 7.94 Ω to 9.26 Ω were prepared by theoretical calculation. Finally, the graphite heating tube obtained by optimizing the packaging and gas filling process can shorten the oven baking time by about 30%, and improve the color and aroma of food. Because the infrared radiation wavelength of graphite heating tube is better matched with food and the heating tube heats up faster.

Key words: Graphite, Heat, Infrared radiation