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用热炕干燥室、湿式干燥室和隧道干燥室干燥陶瓷坯体,干燥周期较长(约在24～26小时以上),质量较差,破损率较高。如果采用分段干燥法,可以得到良好的效果。众所周知,陶瓷坯体的干燥,是以对流、幅射的传热方式进行的。当坯体表面受热后,经热传导作用,将热量传递到坯体内部。随着坯体的受热,表面层水分向四周空间扩散。这时,若坯体表面层的蒸气压小于内部的蒸气压,则坯体内外的湿度平衡被破坏,从而形成了一定的湿度梯度。为了建立新的平衡,坯体内部的水分就向坯体表面移动,并通过表面向空间扩散,
The ceramic green body is dried in a hot crucible drying room, a wet drying room, and a tunnel drying room. The drying cycle is long (about 24 to 26 hours), the quality is poor, and the breakage rate is high. If you use a piecewise drying method, you can get good results. It is known that the drying of the ceramic body is performed by convection and radiation heat transfer. When the surface of the blank is heated, heat is transferred to the interior of the blank through heat conduction. As the green body is heated, the surface layer moisture diffuses into the surrounding space. At this time, if the vapor pressure of the surface layer of the green body is lower than the vapor pressure inside, the humidity balance inside and outside the green body is destroyed and a certain humidity gradient is formed. In order to establish a new balance, the water inside the blank moves toward the surface of the blank and diffuses through the surface to the space.