high frequency electromagnetic field meaning in English

高频电磁场

As well - known , there is an induced current on the surface when metal material is in the high frequency electromagnetic field , since tending to skin heating effect to make the temperature of metal material surface go up promptly , surface beginning melt when temperature reaches the melting point of metal , metal material is heated up continuously by surface to core till the metal droplet of melting
自悬浮定向流技术制备金属纳米微粒与一般的蒸发冷凝法有所不同，其原理是：金属材料在高频电磁场中产生表面感生电流，由于趋肤加热效应使得金属材料表面的温度迅速升高，当温度达到金属的熔点时表面开始熔化，通过热传导作用金属材料由表面到芯部不断加热直至熔化成金属液滴。