The results show that the main factor is the heat transferring to the material,the conglomeration and growing of the cobalt powder on different material bed is effected by the temperature gradient.

• 认为对物料的传热是生产过程中的主要控制因素,由于料层中温度梯度的存在,影响到物料床中不同层次分解的钴粉聚集长大过程。