最近我们研制成功一种新型高功率密度的电热小元件(以下简称小元件,见图1),并将投入生产。该小元件特点是外形小,其最小直径为6.35毫米,最短的长度为45毫米。外壳是不锈钢管,其椭圆度在0.02毫米之内,直度每100毫来不超过0.15毫来。共功率密度是电烙铁芯子的4倍以上,当加热静止空气时,表面负荷为10瓦/厘米~2而且不会烧毁, Recently, we successfully developed a new type of high power density small electric components (hereinafter referred to as small components, see Figure 1), and will be put into production. This small component features a small form factor with a minimum diameter of 6.35 mm and a minimum length of 45 mm. Shell is stainless steel tube, the ovality within 0.02 mm, straightness no more than 0.15 milligram per 100 milli. The total power density is more than 4 times of the electric iron core. When the still air is heated, the surface load is 10 watts / cm ~ 2 and will not be burned down.