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    • 5. 发明授权
    • Method and apparatus for producing microshells
    • 用于生产微壳的方法和装置
    • US5055240A
    • 1991-10-08
    • US858054
    • 1986-04-30
    • Mark C. LeeChristopher H. SchillingTaylor G. Wang
    • Mark C. LeeChristopher H. SchillingTaylor G. Wang
    • B01J13/04
    • B01J13/043
    • A method is described for forming hollow particles, or shells, of extremely small size. The shell material is heated to a molten temperature in the presence of a gas that is at least moderately soluble in the shell material, to form a solution of the molten shell material and the soluble gas. The solution is atomized to form a multiplicity of separate droplets that are cooled while in free fall. Cooling of a droplet from the outside traps the dissolved gas and forces it to form a gas bubble at the center of the droplet which now forms a gas-filled shell. The shell is reheated and then cooled in free fall, in an environment having a lower pressure than the gas pressure in the shell. This causes expansion of the shell, to form a shell having a small wall thickness compared to its diameter.
    • 描述了形成极小尺寸的中空颗粒或壳的方法。 壳体材料在至少适度溶解于壳材料的气体存在下加热至熔融温度,形成熔融壳材料和可溶性气体的溶液。 该溶液被雾化以形成多个独立的液滴,其在自由落体时被冷却。 来自外部的液滴的冷却捕获溶解的气体并迫使其在液滴的中心处形成气泡,其现在形成充气的壳体。 在壳体被再加热然后在具有比壳体中的气体压力低的压力的环境中自由下落中冷却。 这导致壳的膨胀,形成与其直径相比具有小的壁厚的壳。