Induction heating of loaded materials
    96.
    发明授权
    Induction heating of loaded materials 失效
    负载材料的感应加热

    公开(公告)号:US5378879A

    公开(公告)日:1995-01-03

    申请号:US49900

    申请日:1993-04-20

    摘要: A system for employing induction heating to heat a non-magnetic, electrically non-conductive material in situ quickly, uniformly, selectively and in a controlled fashion. Particles which are essential to the improved use of induction heating for this type of application are added to the host material and exposed to high frequency alternating electromagnetic fields such as those produced in an induction coil. The particles are ferromagnetic, having high magnetic permeability and high electrical conductivity. The heat-generating efficiency of these particles when exposed to alternating magnetic fields, permits a smaller volume fraction of these particles in the host material such that the desired properties of the article remain essentially unchanged. Overheating of the article may be prevented by selecting the particle Curie point such that the particle autoregulates at a temperature about equal to the temperature to which the article is to be heated. These particles preferably have the configuration of a flake, i.e., a thin disk-like configuration. This configuration includes a first, second and third orthogonal dimension, wherein the first and second orthogonal dimensions are each greater than the skin depth of the particle and are each at least about 5 times the third orthogonal dimension.

    摘要翻译: 一种采用感应加热来快速,均匀,有选择地并以受控方式加热非磁性,非导电材料的系统。 将用于这种类型的应用的改进使用感应加热所必需的颗粒添加到主体材料中并暴露于高频交变电磁场,例如在感应线圈中产生的那些。 颗粒是铁磁性的,具有高导磁率和高导电性。 当暴露于交变磁场时,这些颗粒的发热效率允许这些颗粒在主体材料中的体积分数较小,使得制品的期望性质基本保持不变。 可以通过选择颗粒居里点来防止制品的过热,使得颗粒在大约等于制品被加热的温度的温度下自动调节。 这些颗粒优选具有片状构造,即薄盘状构造。 该配置包括第一,第二和第三正交尺寸,其中第一和第二正交尺寸均大于颗粒的表层深度,并且分别为第三正交尺寸的至少约5倍。